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LAKSHMI SCHOOL, MADURAI PRACTICE SHEET- ENGLISH – Class VIII
I. Read the given passage and answer the questions below:
Tintin, the comic Hero A comic is a magazine that tells stories
through pictures. A comic strip is a series of drawings that tell a
story, especially in a newspaper or weekly. Children as well as
adults enjoy reading comics like the Amar Chitra Katha, Tintin
stories, Superman and others.
THE ADVENTURES OF TINTIN continue to interest and fascinate his
fans many decades after this irrepressible comic hero first
appeared in print on January 10, 1929. The creation of the Belgian
author Herge, whose real name was Georges Prosper Remi, Tintin is
one of the most recognised and best-loved fictional characters and
perhaps Belgium’s most famous icon. Although essentially a
comic-strip character, Herge knew the importance of accurate
research and took care to place Tintin in a real and believable
world. Clippings from magazines, visits to museums, consultation
with experts, all contributed to the successful shaping of his
lovable character. An adolescent with no known family, this
enduring character is a journalist, an adventurer and a detective
all rolled into one. The round-faced, dotty-eyed reporter has only
one distinctive feature: the celebrated quaff. The Brussels
newspaper, Le Vingtieme Siecle introduced Tintin in a comic
supplement and he hasn’t looked back since. The intrepid, ageless
reporter has had an uncanny knack of surfacing at just the right
moment in international crises. Along with a supporting cast led by
his faithful dog Snowy, Captain Haddock, and the eccentric
Professor Calculus, Tintin battles good-for-nothings of all
stripes, spies, drug-runners, mad scientists and Latin American
guerrillas. The boy-reporter’s first adventure was Tintin in the
Land of the Soviets, and he exposed the Soviet propaganda and put
the communists in their place. From this debut, he went on to be
present at the Japanese invasion of China in the 1930s, to get
embroiled in an oil crisis in the Middle East. Before trekking to
the capital of crime, Chicago, he was in Belgian Congo in Africa.
He even went on a voyage to the moon, 15 years before Neil
Armstrong landed on the moon aboard Apollo. It is a familiar sight
in these comic strips to see Tintin grabbing his coat to chase
another adventure with his trusted Snowy in tow. From villainous
drug smugglers at sea to expeditions to the North Pole, and
searching for sunken treasures in the Caribbean, Tintin and his
gang have escaped the jaws of death many times. Courageous,
ingenious, modest and practical, Tintin never hesitates to confront
the forces of evil and protect the weak. The breathless career of
this young journalist, with his cowlick hair, has taken him all
over the world in 23 of his comic adventures. With his exploits,
the dashing reporter conquered the hearts of readers of comics and
generated a legion of Tintin fans across the world. The Tintin
books have been translated into more than sixty languages. The last
adventure was left unfinished on Herge’s death in 1983. This
favourite hero hasn’t chased any new adventure after the demise of
his creator, but Tintin lives on in an endless stream of Tintin
T-shirts, watches and mugs. The fact of the matter is that although
Tintin’s last completed adventure appeared in 1976, he is more
alive today than ever before. A silver 10-euro coin depicting
Tintin and Snowy was minted specially for the 75th anniversary in
2004, in honour of this endearing comic character. The American
director Steven
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Spielberg made the animated film The Adventures of Tintin in
2011, which became a hit across the world. I. Choose the correct
synonym for the given word; (5) 1.testimony a) trial b) belief c)
invent d) evidence 2.. Strike out what is not true. (1) a) Tintin
is essentially a comic-strip character. b) Tintin is one of the
most recognized and best-loved fictional characters. c) Tintin is
England’s most famous icon. d) Tintin is a journalist. 3. How did
Herge add a touch of realism to his comic character? (2) 4. Why do
you think people like Tintin? (2) 5. a) Use the appropriate
prefixes: - (3) 1. legal – ( de / il / in) 2. patient – (un / im /
anti) 3. understand – (ir / non /mis) 6. In not more than 50 words
summarize the character sketch of Tintin. (8) II. Choose any one of
the essays in not more than 300 words: - (10) 1. Describe an
incident in which you have learnt a lesson on the value of
punctuality. OR 2. Imagine that you have changed your school
recently Narrate your experience on your first day in the new
school. How did you feel at the end of the day? III. Choose any one
of the letters: - (10) 1. A friend of yours has been out of station
for a month and there was an important event / function held in the
school while he / she was away. Write him / her a letter describing
the event / function, and your role in it, and why your friend was
missed. OR 2. You have accidentally left your suitcase behind when
you got off the train. You only realised it after the train left
the platform. Write a letter to the station master reporting your
loss and request that the suitcase be located and kept till you
claim it. IV.GRAMMAR A. Choose the right article and fill in the
blank: - (1) a) A: What’s wrong? B: I have ________ bad headache.
(a / an /the) b) A: Why was today’s class cancelled? B: It was
cancelled because ________ teacher is sick. (a / an / the) B. Pick
out the correct preposition and fill in the blanks: - (1) a) You
shouldn’t pick _______ him just because he’s different. (on / to
/with)
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b) _______ the year, I’ve spoken to her five times. (in /during
/throughout) C. Change the following sentences according to the
given instruction: - (3) a) Shakespeare is the most famous of all
writers in English. (Use: more famous) b) Air is lighter than
water. (Use: light) c) Very few boys in the class are as strong as
Shyam. (Use: strongest) D. Do as directed: - (6) a) We had not even
walked one kilometre when they stopped us. (Begin: Hardly...when)
b) The memory is so vivid that I cannot forget it. (Use: too...to)
c) As soon as she sang a song, the audience applauded. (Use: No
sooner...than) d) He came late to school. He forgot to submit his
project. (Use: Not only...but also) e) No sooner does the bell ring
than the children run out. (Begin: As soon as…) f) Ravi was too
tried to travel. (Use: so...that) E. Choose the right option: - (3)
1. The child is eating cakes. Cakes ___________ by the child. a)
are eaten b) are being eaten c) have been eaten d) is eaten 2. The
master punished the servant. The servant ________ by the master. a)
is punished b) was punished c) has punished d) had punished 3. May
God bless you with happiness. ___________ with happiness. a) May
you blessed b) May you be blessed c) May blessed you be d) May you
are blessed F. Identify the speech of the given sentences and
convert each to the other : - 1. He said, “The film began at seven
o’clock.” 2. “Does she know Robert?” he wanted to know. 3. The
stuntman advised the audience not to try that at home. 4. She
exclaimed that the weather was too hot. G. Choose the correct verb
that agrees to the subject: - 1. Nobody (know /knows) the trouble
I’ve seen. 2. The committee (debates / debate) these questions
carefully. 3. The players, as well as the captain, (want / wants)
to win. 4. All of the photos, even the scratched one, (are / is) in
the case.
____________________________________________________________________________________
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0
10
20
30
40
50
60
70
80
90
100
1 2 3 4 5 6
mar
ks o
bta
ine
d
Tests
Marks obtained by Mohit and Rahul
Mohit marks
Rahul marks
LAKSHMI SCHOOL MATHEMATICS PRACTICE SHEET -1 CLASS - VIII
Question 1 a) Anchal bought a second hand car for ₹ 2,25,000 and
spent ₹ 25,000 for its repairs. If she sold it for ₹ 3,25,000.What
is her profit percent? b) (i) Find x and y in the given figure. 16
𝑐𝑚 . 2𝑥 18 𝑐𝑚 2𝑦 − 6
(ii) In a quadrilateral PQRS,50=P ,
50=Q , 60=R .Find .S
Is this quadrilateral concave or convex? c) The volume of a
cylinder is 6358 m3 and its height is 7m. Find its radius and
curved surface area. Question 2 a) Solve and find the value of a
:
1127
11
6
11
6
11
6−
=
a
b) Using identities, factorize the following polynomial:
(i) abba 4)( 2 −+ (ii) 24102 ++ xx
c) Construct a quadrilateral ABCD where AB=5 cm, BC=4.6 cm, CD=
3.9 cm, AD= 2.8 cm and AC= 6.2 cm Question 3
a) Calculate the amount on a sum of ₹ 30000 at the rate of 8%
per annum for 2 years, interest is compounded annually.
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b) The graph given above represents the marks obtained by Mohit
and Rahul in six different math tests conducted during a month.
(i) What was the mark obtained by Mohit in Test 4? (ii) In which
test did they score equal marks? (iii) Who has shown consistent
performance? Give reasons for your answers.
c) Solve and find the value of 𝑥: 2
1
5
3
2
5=
−−
− xx
Question 4
a) Simplify )2(3)4(2 2 ++− xyxyx and hence find its value for
5&0 == yx .
b) . 14m Find the area of the unshaded portion. 16 m c) The
types of vehicles visiting a petrol bunk during one day are given
below. Represent the given data in a pie chart.
Types of vehicles
Car Truck Bus Train
No. of vehicles
26 12 8 14
Question 5 a) (i) Two sticks each of length 7cm are crossing
each other such that they bisect each other at right angles. What
shape is formed by joining their end points? Give reason. (ii) How
many non- overlapping triangles can we make in a pentagon by
joining its vertices?
b) If A = zyx 15115 −+ , B = zyx 191312 −+ , C = zyx 2167 −+ .
Find A+B - C.
c) The sum of the present ages of a father and son is 66 years.
After 3 years, the father’s age will be thrice the son’s age. Find
their present ages. Question 6 a) The area of the base of a right
circular cone is 525 sq.m and its height is 8cm. Find its
volume.
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b) Verify 22 )85(160)85( −=−+ xxx
c) Draw a linear graph for the following:
Question 7 a) Write the greatest common factor in each of the
following terms:
(i) aa 64,8 2−
(ii) )4(),16( 2 −− yy
(iii) )7(),426( −− xx
b) Lemons were bought at ₹ 48 per dozen and sold at the rate of
₹ 50 per 10.Find gain or loss percent.
c) A cuboidal tin opened at the top has dimensions 20 cm 16 cm
14 cm. What is the total area of metal sheet required to make 10
such boxes? Question 8
a) Find the third side of a triangle whose perimeter is )777( 2
−+ xx and the two sides are )565( +x
and )136( 2 −+ xx
b) Fill in the blanks.
(i) The multiplicative inverse of 10010− is ____
(ii) The standard form of 10000000
1 is ____
c) Compute the compound interest on ₹12,000 for 1½ years at 10%
per annum compounded half yearly.
Question 9 a) The perimeter of a rectangular garden is 38 m and
its area is 60 m2. What are the dimensions of the garden ?
A. 6m 10m B. 2m 30m C. 3m 20 m D.4m 15m
Side of equilateral triangle (in cm)
2 3 4 5 6
Perimeter (in cm)
6 9 12 15 18
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60=P
b) If we add
−
2
3to a number and multiply it by
2
5, we obtain
8
3. What is the number?
c) Evaluate 6.5
25.125.175.475.4 − using suitable identities
Question 10
a) Divide )4925(27 22 −yy by )75(9 2 +yy
b) Solve and find the value of m: 12
5
23
55
555=
−
−m
c) The marked price of an article is ₹ 500. The shopkeeper gives
a discount of 5% and still makes a profit of 25%. Find the cost
price of the article.
Question 11 a) A photo frame is in the shape of a quadrilateral.
If one diagonal is longer than the other, then what shape you get?
Give reason. b) Construct a parallelogram PQRS where PQ = 4 cm, QR
= 5 cm and c) The weight (in kg) of 30 students are given below.
Make a histogram for the given data using class intervals 30 - 35,
35 - 40 and so on .
Question 12 a) Which of these numbers is the largest? A) 4.2 ×
105 B) 2.568 × 106 C) 3.7 × 109 D) 3.89 × 107
b) Draw a circle of radius 3 cm and draw its diameter and label
it as AC. Construct its perpendicular bisector and let it intersect
the circle at B and D. What type of quadrilateral is ABCD? Justify
your answer. c) The pocket money of Ishan and Raghav are in the
ratio of 5 : 7. If the pocket money of both of them is increased by
₹ 225, the new ratio will be 3: 4. Find the pocket money they
get.
41 30 53 51 54 43 56 54 56 43
51 32 54 52 58 38 42 45 33 49
48 37 53 35 41 49 49 50 51 55
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LAKSHMI SCHOOL MATHEMATICS PRACTICE SHEET -2 CLASS - VIII
QUESTION - 1
(a) A brigadier wants to arrange 5776 soldiers in rows in such a
way that number of soldiers in each row is same as the number of
rows . Find the number of soldiers in each row. (b) Bananas are
bought at the rate of 4 for ₹.3. At what rate must they be sold to
gain 20%? (c) Find the product of (10x2 – 2x + 1) and (5x + 3).
QUESTION - 2
(a) In a boarding house, there are provisions for 90 boarders
for 40 days. If 10 boarders leave the boarding house, how many more
days will the provisions last ? (b) Shyama bought a watch on the
occasion of Diwali for ₹.728 at a discount of 9%. Find the marked
price of the watch. (c) Evaluate 4982 using identity.
QUESTION - 3
(a) Nikhil borrowed ₹. 64,000 from a bank for 1 ½ years at the
rate of 10 % per annum. Compute the compound interest payable by
Nikhil after 1 ½ years, If the interest is compounded half yearly.
(b) In a one day cricket match, M.S.Dhoni scored 40% of the runs
scored by his team. If he scored 128 runs, what was the score of
the team?. (c) (i) Evaluate : 9-1 + 30 + 6-1 (ii) Write the
standard form of 0.00000832
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QUESTION - 4
(a) A shopkeeper sells two sarees for ₹.1200 each. He earns a
profit of 20% on one and suffers a loss of 20% on the other. Find
his total profit % or loss % on the whole deal. (b) A rectangular
copper block of dimensions 45 cm x 20 cm x 15 cm is melted and made
into cubes of each having the edge 5 cm. Find the number of cubes.
(c) Factorise ax + bx – ay – by QUESTION - 5
(a) The population of a city increased from 80,000 to 85,400 in
1 year. What is the increase percent of the population of the city?
(b) If 711 ÷ 75 = 7-3 x 72p – 1 , find the value of p.
QUESTION - 6
(a) Find the product of ( )xyz9 and 2
3
1
xyz and verify the result for x=2, y=1, z=3.
(b) A trapezium whose parallel sides are 6cm and 11cm has an
area of 34cm2. Find the altitude of the trapezium. (c) 5 machines
together can make 250 garments in 18 hours. If 3 more such machines
are installed,
in how many hours can 250 garments made?
QUESTION - 7
(a) A number is selected randomly from the numbers
1,2,3,4,………..15. Find the probability of getting (i) an even
number. (ii) an odd number. (iii) a prime number. (iv) a two digit
number. (b) Two diagonals of a rhombus are 18cm and 24cm. Find the
area and side of the rhombus. (c) Divide 2a2 + 11a + 12 by (a +
4)
QUESTION - 8
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(a) A water reservoir is 22m long, 16m broad and 10m high. Find
the (i) cost of cementing its floor at a rate of ₹.30 per m2. (ii)
painting the four walls at the rate of ₹.19 per m2.
(b) Find the cube root of3375
343
(c) The perimeter of a parallelogram is 50cm. one side is 1 ½
times the other. Find the sides of the parallelogram QUESTION – 9
(a) The denominator of a fraction is 12 more than the numerator. If
16 is added to both the numerator and denominator, the new fraction
so obtained is 10/ 13 . Find the original fraction. (b) Find the
sum of interior angles of an octagon. Also find the measure of each
interior angle. (c) Find the product of 52 and 48 using identities.
QUESTION – 10 (a) The table below gives the weight of a man at
different ages.
Age(years) 4 6 8 10 12 14 16 18 20
Weight (kg) 20 25 35 40 45 55 60 65 70
Draw a line chart to represent the above data. Estimate from the
graph, the weight of the man when he was 9 years old. (b) Solve: 18
– 3(x – 2) = x + 8 QUESTION – 11 (a) Draw a pie chart to represent
the following data of a school.
Mode of transport Number of students
Train 120
Bus 160
Tram 40
Car 60
Bicycle 20
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QUESTION – 12 (a) Construct a Rhombus whose diagonals are of 6cm
and 7cm. (b) A man is five times as old as his son. In two years
time, he will be four times as old as his son. Find their present
ages. (c) Find the other 2 members of the Pythagorean triplet, one
of whose members is 20. QUESTION – 13 (a) Construct a quadrilateral
ABCD such that AB = 4.2cm, AD = 5cm, CD = 6cm, A = 600 and B = 1200
(b) In the given figure, ABCD is a trapezium ofD = 880 . Find the
values of x and y.
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REVISION
SUBJECT PHYSICS CLASS VIII
I. Choose the appropriate answer. 1. The light rays are get
----------------------------- by plane mirrors and
------------------- by a glass slab.
a) reflected , reflected b) refracted ,reflected c) reflected ,
refracted
2. When we polish a spherical mirror on the -------------- side,
do we get a convex mirror
a)inner b) outer c) both
3) When rays of light are refracted by a glass prism, they
are-------------------------
a) bent twice away from the its base b) bent twice towards the
base
c) once bent away from the base and once towards the base
4. Select the substance which does not undergo sublimation (a)
Common salt (b) Naphthalene (c) Ammonium chloride (d) Camphor
5 The external factor which do not affect vapourisation is
_______________
a). Temperature b). Humidity c). Wind Speed d). none of
these
6. The reverse process of evaporation is
-------------------------
a) fusion b) condensation c) solidification d) deposition
7) Sinking and floating depends on -------------
a) amount of water displaced b) density of an object c) density
of water d) all of these
8) Dense air move towards the surface of the earth due
to------------------
a) convection current b) wind in the atmosphere c)ocean current
d) both a and b
9) The scientist who invented the simple barometer
is-------------
a) Pascal b) Newton c) Torricilli d) Galileo
10) The device that does not use atmospheric pressure for its
working is -------------
a) syringe b) medicinal dropper c) crane d) water pump
11) Burning of meteors in the atmosphere is due to
---------------------- force
a) electrostatic b) magnetic c) gravitational d) frictional.
12. The pressure exerted at any point on an enclosed liquid is
transmitted equally in all directions is
stated by -----------------------
a) Alexander b) Pascal c) Boyle d) Charles
13. A body weighing 400g wt is dipped in water. Its weight in
water as indicated by the spring balance
is 350 g wt. The buoyant force acting on the body is
a) 400g wt b) 350 g wt c) 50 g wt d) 250 g
14. The image formed by a concave lens is ________.
a) always real and enlarged b) always real and diminished
c) always virtual and enlarged d)always virtual and
diminished
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15. Which form of electric discharge appears in nature?
a) rain b) ocean currents c) lightning d) volcanoes
16. A negatively charged body has -------------------
a) excess of electrons b) deficiency of electrons
c) no change in the number of electrons d) none of
17. The volume of irregular solids can be determined
using__________
a) Standard formulae b) water displacement method c) Lactometer
d)
density bottle
18 Density of an iceberg is __________ water.
a) more than b) less than c) double than d) equal to
19.Camels exert less pressure on the sand because they
______.
a) are light in weight b) cannot exert much force c)have broad
feet d) can
exert much force
20. Moment of force is calculated by
a) M=F+d b) M=F/d c) M=Fxd d) M = d/F
21. Which of the following is used as a rear view mirror in
automobiles?
a)concave mirror b) convex mirror c)plane mirror d)none
of the above
22 Which colour suffers maximum bending in the spectrum of white
light during dispersion?
a) Yellow b) Green c)Red d)Violet
23 joule= _______ calories.
a)1000 b)1/4.2 c)4.2 d)1/1.24
24. An alloy which expands very little on heating
is__________
a) invar b)steel c) nichrome d)brass
25. What helps in saving tall buildings from the harmful effects
of lightning?
a) Charging b)Earthing c) Electrification d) none of
the above
26. Which of the following protects the gold leaves from air
currents in a gold leaf electroscope?
a) Brass rod b)Wooden base c)Glass jar d) Insulator
plug
Fill in the blanks with a suitable word or words to complete it
properly:- 1. Charging by _______ is possible only for conductors
and not for insulators.
2. A solid made up of iron will expand ______ than the solid
made up of brass for the same rise in
temperature.
3. When the object is at infinity, its image is formed at the
______ of the concave mirror.
4. The force exerted by a force of 1 N acting over an area of 1
m2 is ________.
5.The buoyant force experienced by a body when floating in salt
water is __________ that when floating
in pure water.
6.The geometrical centre of a spherical mirror is called
----------------------- 7 If the focal length of a concave mirror
is 16cm , then its radius of curvature is ---------------- cm.
8.When a ray of light travel from a rarer medium to denser medium
it bends ---------------------- 9. Physical properties that
differentiates one substance from another is called _____
10. The density of a substance with respect to the density of
water at 4°C is called_____
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11. If the density of iron is 7.2 g/m3.Then its value in kg/m3
is ______
12.. A body partially or fully immersed in a liquid, experiences
an upward force that is equal to the
weight of the liquid displaced by it and this principle is known
as ______
Answer the following:- . 1 Name the medium A and B and trace the
path of the light ray when it travels from medium B to A. A 2.Give
reasons The sun is seen before the actual sun rise. 3.State the
laws of refraction. 4 Differentiate between refraction by a prism
and by a rectangular glass slab. 5. Convex mirror is used as a rear
view mirror in an automobile. Why?
6. State the principle of floatation.
7. Explain, how heavy objects are able to float in water.
8. Give reason. The lower end of hydrometer is filled with lead
shots. Why. ?
9. In new system of measurement, length is measured as ‘X’ and
mass is measured as ‘Y’. Find the unit
of density in that system.
10. How is convection current formed?
11. The boy ‘X’ weighs 600N sits 1.5 m away from the pivot of
see-saw. An another boy ‘Y’ weighs 500N sits 2m away on the other
side of the board. Find which side of see-saw will moves down.?
12. The pressure between the tyre and the road is 200000 Pa. If
the weight of the bus is 2000 N. Find the area of contact between
the tyre and road.
13. Distinguish between force and pressure.
14. Write any two characteristics of liquid pressure
15. Give reason. Deep sea divers have to wear special suits.
16. State the two factors which change the turning effect.
17 The mode of transfer of heat in liquid ..
18. An instrument used to measure atmospheric pressure.
19. The image that cannot be taken on a screen.
20. The method of charging an object without touching it with
another charged object.
21. The instrument that is used to find the type of charge
present in a body .
22 Draw a labelled diagram of gold leaf electroscope.
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23. Observe the images and answer the questions given below.
a) What kind of thermal expansion takes place in the above
diagram? b) Write the relationship between α, β, γ c) Give two
applications of thermal expansion you come across in daily life.
24. The diagram given below shows two parallel rays 1 and 2
incident on (a) concave mirror and (b)convex mirror. Draw the
reflected rays and mark the focus.
25 Trace the path of the ray of light as it gets refracted
through the prism after drawing the normal. Mark
the angle of incidence, the angle of emergence and the angle of
deviation.
2 6 Draw a ray diagram of a concave mirror when an object is
placed at C and write the position , size and the nature of the
image 27 Explain the term Principal focus of a concave lens with
the help of ray diagram.
28. Mr John is very fond of observing and studying about nature.
He decided to study the following.
i) A small leaf of a tall tree.
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ii) Organisms present in the human blood.
iii) A very old book on nature with very small –sized
writing
Which optical instrument should John use for each of the
above?
29 Draw a ray diagram to show refraction of light through a
rectangular glass prism. And state the laws of
refraction used in it.
30. What happens when a ray of light is incident normally on one
of the faces of a rectangular
glass slab? Support your answer with the help of diagram.
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LAKSHMI SCHOOL, MADURAI
PRACTICE SHEET
VIII- CHEMISTRY
I. Choose the correct answer:
1.The forms of carbon which can be used to produce water gas
is
a. Coke b. Bone charcoal
c. Lampblack d. Gas carbon
2. The mass no. of chlorine is 35, and its atomic no. is 17, the
electronic configuration is
a. 2,8 b. 2,8,7 c. 2,7,8 d. 2,6,9
3. Manu prepared an aqueous solution of CuSO4 and AgNO3 in
beakers X and Y. She then
dropped some Iron pieces in beaker X and Copper pieces in beaker
Y. After 10 hours she
observed that the solution in X and Y respectively appear.
a. Colorless and light blue b. Colorless and pale green
c. Greenish and Colorless d. Green and Blue
4. Nitrate is a ___________ ion.
a. Mono atomic anion b. Mono atomic cation
c. Poly atomic cation d. poly atomic anion
5. Copper oxide and Sulphuric acid reacts to form
a Sulphur –di-oxide, and oxygen b. Copper Sulphate and
Oxygen
c. Copper , hydrogen, oxygen d. Copper Sulphate and water
6. Which among the following represents Buckminster
fullerene
a. C32 b. C50 C. C60 D.C70
7. Hydrogen chloride gas is formed when hydrogen gas combines
with chlorine in the presence
of ____________
a. Direct Sunlight b. Diffused Sunlight c. In the dark d.
Oxygen
8. Which of the statements about the reaction below are
incorrect?
2CuO + H2 → 2Cu + H2O
i. Copper is getting reduced. ii. Water is getting oxidized
iii. Hydrogen is getting oxidized iv. Copper oxide is getting
reduced
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a. I and ii b. I and iii c. I, ii and iii d. All of these
9. Gas which is collected at anode when water is
electrolyzed
a. H2 b. O2 c. He d. Cl2
10. The form of carbon which is in Kajal
a. Gas carbon b. lampblack c. Charcoal d. Coke
II. Name the following :
1. The element that has two sub atomic particles.
2. A base that is soluble in water.
3. The compound formed by the reaction between haemoglobin and
carbon monoxide.
4. The reaction which involves addition of hydrogen and removal
of oxygen.
5. Electrons present in the outermost shell of an atom.
III. Complete the table
Element
Atomicnumber (Z)
Mass number (A)
No. of protons (p)
No. of electrons(e)
No of neutrons (n)
Carbon 6 --- 6 --- 6
Boron --- 11 5 5 ---
Aluminum 13 --- --- 13 14
Argon 18 40 18 --- ---
---------- 11 23 --- 12 11
IV. Answer the following
1. Valency of calcium is 2, write the formula for calcium
chloride, calcium phosphate, calcium
oxide, calcium hydroxide.
2. What is catenation?
3. a) What type of gas will be evolved when a carbon compound
undergoes incomplete
combustion. ?
b) How does it reduce zinc oxide to zinc?
4. Identify the acidic, basic, neutral and amphoteric oxides
from the following
K2O, CO2, CO, PbO,
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5. Arrange the following elements in the decreasing order of
reactivity
Al, Fe, Zn, Au, K, Mg, Cu, Ag
6. How will you obtain?
a. Ammonia from nitrogen b. Zinc chloride from zinc
7. Draw the electronic configuration of a. Nitrogen b.
Potassium
8. Why should not we use dilute H2SO4 in the preparation of
carbon dioxide from calcium
carbonate?
9. Why is graphite used in making crucibles?
10. Diamonds have extraordinary brilliance. Give reason.
11. What is the composition of bone charcoal?
12. Which allotrope of carbon is used as a catalyst in certain
chemical reactions?
13. What makes graphite to conduct electricity?
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5. Arrange the following elements in the decreasing order of
reactivity
Al, Fe, Zn, Au, K, Mg, Cu, Ag
6. How will you obtain?
a. Ammonia from nitrogen b. Zinc chloride from zinc
7. Draw the electronic configuration of a. Nitrogen b.
Potassium
8. Why should not we use dilute H2SO4 in the preparation of
carbon dioxide from calcium
carbonate?
9. Why is graphite used in making crucibles?
10.Diamonds have extraordinary brilliance. Give reason.
11. What is the composition of bone charcoal?
12. Which allotrope of carbon is used as a catalyst in certain
chemical reactions?
13. How is graphite diferrent from diamond in conducting
electricity
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14. Write the difference between adsorption and absorption.
15.Rahim was doing an experiment with hydrogen, he passed the
gas over a non metal
which is yellow in colour. After some time he noticed a rotten
egg smell.
a)Identify the non metal. b)What is the reason for the
smell?
c) Write the chemical reaction.
V. Balance the following equations
1. Zn + NaOH → Na2ZnO2 + H2
2. Pb(NO3)2 →PbO + NO2 + O2
3. KClO3 →KCl + O2
4. P + O2→ P2O5
5. Al + HCl → AlCl3 + H2
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
14. How to prepare bone charcoal?
15.Rahim was doing an experiment with hydrogen, he passed the
gas over a non metal
which is yellow in colour. After some time he noticed a rotten
egg smell.
a)Identify the non metal. b)What is the reason for the
smell?
c) Write the reaction.
V. Balance the following equations
1. Zn + NaOH → Na2ZnO2 + H2
2. Pb(NO3)2 →PbO + NO2 + O2
3. KClO3 →KCl + O2
4. P + O2→ P2O5
5. Al + HCl → AlCl3 + H2
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LAKSHMI SCHOOL,MADURAI – 20 . STD : VIII BIOLOGY
REVISION –PRACTICE SHEET
I. Name the following 1. The flower that bears both the male and
female part 2. The stage of life when the body becomes capable of
sexual reproduction after attaining sexual maturity. 3. A bundle of
neurons. 4. Mass of undifferentiated cells. 5. Male or female
reproductive sex cells 6. The period between fertilisation and
birth. 7. The chemicals secreted by the endocrine glands. 8. The
mental tension or worry caused by problems. 9. The valve present
between left auricle and left ventricle. 10. All animals
domesticated by human beings for their usefulness. II. How would
you describe the following : 1. Immunity 2. Organic farming 3.
Congenital disease. 4. Hybridization. 5. Implantation III. Choose
the correct answer: 1. Which of the following is not an underground
stem? (a) corm (b) bud (c) rhizome (d) bulb 2. Central canal is
surrounded by an H-shaped area called __________ (a) Meninges (b)
Vertebral column (c) Grey matter (d) Skull 3. Adolescent boys may
have a hoarse voice because of enlargement of the ______. (a)
Larynx (b) Pharynx (c) Thyroid gland (d)Pituitary gland 4.
Deficiency of which hormone during early infancy causes cretinism ?
(a) Thyroxine (b) Estrogen (c) Adrenaline (d) Insulin 5. Which type
of neuron carries impulses from the brain or the spinal cord to the
effectors? (a) cranial neuron (b) spinal neuron (c) motor neuron
(d) sensory neuron 6. Blood circulation takes the following course
in man’s heart (a) Left auricle → Left ventricle → Lungs → Right
auricle → Right ventricle. (b) Right auricle → Right ventricle. (c)
Left auricle → Left ventricle. (d) None of these. 7. An example of
milch animal is (a) bullock (b) mule (c) pig (d) buffalo 8. Which
of the following is not an example of a breed of buffalo? (a)
Frieswal (b) Mehsana (c) Surti
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(d) Murrah 9. ________ vaccine is used to build immunity against
tuberculosis (a) BCG (b) DPT (c) MMR (d) TT 10. Which of these
disease spreads through contact with infected rats? (a) Dengue (b)
Sleeping sickness (c) Filariasis (d) Plague. IV. Write the
differences between : 1. Cash crops and Food Crops 2. Congenital
and Acquired disease. 3. Menopause and Mensturation. 4. Budding and
Fragmentation. 5. Red blood cells and White blood cells. 6.
Receptors and Effectors. V .Give reasons: 1. Blood transfusion is
done very carefully by matching the blood group of the donor and
recipient . 2. Seeds should be sown at a proper depth and proper
distance 3. Adrenal gland is called gland of emergency. 4. Grains
must be completely dried before storing. 5. Pituitary gland is
called as master gland. VI .What would happen if : 1. We do not
cover our nose during sneezing? 2. One accidently steps on a
pointed nail? VII. Answer the following: 1. Adolescence is a
crucial stage . Justify. 2. What kind of first aid can be given to
second degree burns? 3. Pancreas is an endocrine as well as an
exocrine gland. comment 4. Observe the diagram and answer the
following
(i) Label the parts A – F
(ii) Part E has thick walls. Give reason.
(iii) Write the function of part ‘F’
(iv) How is mixing of oxygenated and deoxygenated blood
prevented in heart ?
(v) What is cardiac cycle?
5. Given below is the diagram of female reproductive system:
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a. Label the parts A—D. .
.b.Where does each of the following take place?
(I).Release of an egg.
(II).Fertilization
(III).Implantation
6. Why is it necessary to have iodized salt in the body?
7. A child has following symptoms
Alternate phases of chill and high fever in a day or 3 – 4 days,
vomiting and severe head
ache, fever with profuse sweating and the red blood cell count
drops.
(i) Identify the disease
(ii) Write the name of the pathogen and the vector that causes
the above said disease.
(iii) Write any 2 preventive measures for the disease.
8. How does excessive consumption of alcohol affect human
beings?
9. Why is SA node called as the pacemaker of the heart?
10. What are the benefits of Green Revolution in our
country?
11. What are biofertilisers?.
12. Draw a neat diagram of adrenal gland and label the following
parts:
VIII. Write the causative organisms for the following
diseases:
1. Amoebic dysentery
2. Malaria
3. Cholera
4. Tuberculosis
5. Typhoid.
6. Plague.
7. Sleeping sickness.
8. Filariasis
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9. Rabies
10.Influenza.
IX. Write the full form:
1. OPV
2. DPT
3 .MMR
4 .BCG
5 .AIDS
6. COVID-19
7. TT
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லக்ஷ்மி பள்ளி, மதுரை – 625 020 பயிற்சிக்குரிய வினாக்கள் இைண்டாம்
மமாழி – தமிழ்,
வகுப்பு: எட்டு
1. இக்காலத்தில் மக்களிடையய மனிதயேயம் குடைந்துவருவதால் ஏற்படும்
இன்னல்கடள விளக்கி, மனிதயேயத்டத வளர்க்க சில வழிமுடைகடள எடுத்துக்கூைி
ஒரு கட்டுடை எழுதுக. 2. ‘ோட்டுவளம் யவண்டின் காட்டுவளம் யவண்டும்‘
என்ை கருத்திடன ஆதரித்து ஒரு கட்டுடை வடைக. 3. ‘இயற்டகப் யபரிைர்
யமலாண்டமயில் மாணாக்கரின் பங்களிப்பு‘ என்ை தடலப்பில் ஒரு கட்டுடை
எழுதுக. 4. பள்ளியின் கடல, இலக்கிய ேிகழ்வுகளின் மாணவர்
ஒருங்கிடணப்பாளைான ேீ, அடுத்தமாதம் உன் பள்ளியில் ேடைபபைவுள்ள மாவட்ை
அளவிலான “இலக்கியத் பதன்ைல் - 2017” விழா பற்ைி எடுத்துக்கூைி, அதடன
ஒளிப்பைம் எடுத்துத் பதாடலக்காட்சியில் ஒளிபைப்பக்யகாரி,
பதாடலக்காட்சி ேிடலய இயக்குேருக்கு யவண்டுயகாள் விண்ணப்பம் எழுதுக. 5.
அண்டமயில் ேீ படித்த சிைந்த கடத ஒன்டை விவரித்து, அது உன்டன
ஈர்த்தவிதம் பற்ைி விளக்கி, அதடனப் படிக்குமாறு பரிந்துடைபசய்து உன்
யதாழன் அல்லது யதாழிக்குக் கடிதம் எழுதுக.
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Lakshmi School, Madurai
Practice Worksheet
Class – VIII (Hindi)