ANIL TUTORIALS Page 2 of 16 SUMMATIVE ASSESSMENT – II, 2012 II, 2012 SCIENCE / Class – X / X Time allowed : 3 hours Maximum Marks : 80 3 80 General Instructions : (i) The question paper comprises of two Sections, A and B. You are to attempt both the sections. (ii) All questions are compulsory. (iii) There is no overall choice. However, internal choice has been provided in all the five questions of five marks category. Only one option in such questions is to be attempted. (iv) All questions of Section-A and all questions of Section-B are to be attempted separately. (v) Question numbers 1 to 4 in Section-A are one mark questions. These are to be answered in one word or in one sentence. (vi) Question numbers 5 to 13 in Section-A are two marks questions. These are to be answered in about 30 words each. (vii) Question numbers 14 to 22 in Section-A are three marks questions. These are to be answered in about 50 words each. (viii) Question numbers 23 to 25 in Section-A are five marks questions. These are to be answered in about 70 words each. (ix) Question numbers 26 to 41 in Section-B are multiple choice questions based on practical skills. Each question is a one mark question. You are to select one most appropriate response out of the four provided to you. (i) (ii) (iii) (iv) (v) 1 4 (vi) 5 13 30 (vii) 14 22 50 (viii) 23 25 70 (ix) 26 41 67027 ANIL TUTORIALS, DEVENDRA NAGAR, SECTOR-5, D/156, RAIPUR, C.G, HELPLINE : 97525-09261, Visit Us : www.aniltutorials.com
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ANIL TUTORIALS
Page 2 of 16
SUMMATIVE ASSESSMENT – II, 2012
II, 2012
SCIENCE /
Class – X / X
Time allowed : 3 hours Maximum Marks : 80
3 80
General Instructions :
(i) The question paper comprises of two Sections, A and B. You are to attempt both the
sections.
(ii) All questions are compulsory.
(iii) There is no overall choice. However, internal choice has been provided in all the five
questions of five marks category. Only one option in such questions is to be attempted.
(iv) All questions of Section-A and all questions of Section-B are to be attempted separately.
(v) Question numbers 1 to 4 in Section-A are one mark questions. These are to be answered in
one word or in one sentence.
(vi) Question numbers 5 to 13 in Section-A are two marks questions. These are to be answered
in about 30 words each.
(vii) Question numbers 14 to 22 in Section-A are three marks questions. These are to be
answered in about 50 words each.
(viii) Question numbers 23 to 25 in Section-A are five marks questions. These are to be answered
in about 70 words each.
(ix) Question numbers 26 to 41 in Section-B are multiple choice questions based on practical
skills. Each question is a one mark question. You are to select one most appropriate
10. “The time difference between actual sunset and the apparent sunset is about 2 minutes”.
Explain this fact with the help of diagram.
11. A person suffering from defect in vision can see nearby objects clearly but cannot see distant
objects distinctly.
(i) Name the defect of vision he is suffering from. State one cause of this defect.
(ii) With the help of diagram, show how this defect can be corrected with the help of a suitable lens.
(i)
(ii)
12. Write any two environmental friendly practices that should be adopted at school level so that
consumption of fossil fuels is minimised.
13. Mention two reasons to explain why forests and wild-life should be conserved.
14. (a) Write a test to distinguish between Ethyl alcohol and Ethanoic acid.
(b) Write structural formula of the functional group present in Propanal.
(c) Explain why soaps are not effective cleansing agents in hard water ?
(a)
(b)
(c)
15. The positions of five elements in the periodic table are shown below :
Group - 1 Group - 2 Group - 15 Group - 16
Period II A B
Period III C D E
(a) What are the number of valence electrons in B ? Identify the element (s) which : (b) will have the smallest atomic radius ? (c) will be the most metallic ?
(d) will form basic oxide ? (e) will show valency three ? (f) will show greatest tendency to gain electron ?
- 1 - 2 - 15 - 16
II A B
III C D E
(a) B
(b)
(c)
(d)
(e)
(f)
16. (a) Name the thread like structure found in the bread mould. Draw a diagram to show
spore formation in (Rhizopus). (b) Write features of its reproductive cells.
(a)
(b)
17. “Only variations that confer advantage to an individual organism will survive in a population.”
Do you agree with this statement ? Why or why not ? Explain with an example in a population of red beetle.
18. (a) Explain how is sex determination controlled by environmental factors in some animals ?
(b) Sex is genetically determined in human beings. Justify this statement.
(a)
(b)
19. Explain various factors which could lead to the formation of new species.
20. (i) Define (a) Focal length, (b) optical center of a concave lens with the help of ray iagrams.
(ii) A point sized image of an distant object is formed at the principal focus of a concave lens. If the object starts moving towards the lens, how will the position of the image change ? Illustrate it with a suitable ray diagram.
21. (i) What is meant by lateral displacement of light when it passes through a glass slab ?
Draw a clear labelled diagram to illustrate it. (ii) What will be the lateral displacement of a ray of light incident normally on the face of glass slab ? Draw a clear diagram to show it.
(i)
(ii)
22. (a) Draw a diagram to illustrate dispersion of light by a prism.
(b) Mention the colours for which each letter in the word VIBGYOR stands for. (c) Write the colours which get deviated most and least respectively after passing through
prism.
(a)
(b) VIBGYOR
(c)
23. (i) Complete the following equation and answer the questions given below :
2 43 2CH CH OH
Hot conc. H SO
(a) Name the products of the reaction. (b) What is the role of hot conc. H2SO4 in the above chemical change ? (ii) Draw electron dot structure for a molecule of methane. (iii) Name the following compounds (a) CH3-CH2-Cl (b) HCOOH
(i)
2 4 H SO3 2CH CH OH
(a)
(b) H2SO4
(ii)
(iii)
(a) CH3-CH2-Cl (b) HCOOH OR (i) What happens when a piece of sodium metal is dropped in ethanol ? Write the
chemical reaction involved. (ii) When do the bottoms of cooking vessels get blackened ? (iii) Write the structure of Cyclohexane and benzene.
(i)
(ii)
(iii)
24. Give reasons for the following :
(a) Placenta has villi on embryo‟s side. (b) Oral pills are hormonal preparations. (c) Uterine linings are thick and spongy. (d) Sperms have a long tail.
(e) Prenatal sex determination has been prohibited by laws.
(a)
(b)
(c)
(d)
(e)
OR (i) Draw a neat diagram of human male reproductive system and label the parts :
(a) the glands from which the secretion of fluid occurs for nourishment of sperms. (b) the tube which delivers the sperms formed. (c) the tube which forms common passage for both sperms and urine. (d) the cavity where testes are located. (ii) Name the organ that secretes testosterone hormone. Write its two functions.
(i)
(a)
(b)
(c)
(d)
(ii)
25. (i) Identify the type of spherical mirror in each of the following case :
(a) Object is placed between infinity and mirror and image formed is virtual, erect, diminished and on the other side of the mirror. (b) Object is placed between the focus and mirror, image formed is virtual, erect enlarged and on the other side of the mirror. Draw ray diagram for each case. (ii) The radius of curvature of a convex mirror used on a bus is 2.0 m. A car coming behind
it is at a constant distance of 3.0 m from it. Calculate : (a) the position and (b) the relative size of image of the car. What will be the nature of image ?
(i)
(a)
(b)
(ii) 2.0 m
3.0 m
(a)
(b)
OR (i) Draw ray diagrams to represent the nature, position and relative size of the image
formed by a convex lens for the object placed : (a) at 2 F1 (b) between F1 and 2F1 of lens.
(ii) The image of a needle formed by a convex lens is obtained on the other side of the lens. If the image is three times the size of the needle and the distance between lens and image is 60 cm, at what distance should the needle be placed from the lens ? What is the nature of image ? Also calculate the focal length of the lens.
(i)
(a) 2F1 (b) F1 2F1
(b)
60 cm
SECTION - B /
26. The colour of a freshly prepared solution filled in a test tube is pale green. The solution could be of : (a) Zinc sulphate (b) Ferrous sulphate (c) Copper sulphate (d) Aluminium sulphate
(a) (b)
(c) (d)
27. A student put a strip of Zn, Fe and Cu in three test tubes containing freshly prepared solution
of aluminium sulphate. After about one hour he observed that : (a) each test tube becomes hot (b) a brown mass is deposited on the surface of each metal (c) the solution changes from colourless to light green (d) no change occurs
Zn, Fe Cu
(a)
(b)
(c)
(d)
28. A student adds a pinch of sodium hydrogen carbonate to acetic acid taken in a test tube and
makes the following observations. (A) A brisk effervescence is produced with the liberation of a colourless and odourless gas. (B) The gas extinguishes the burning splinter. (C) The gas burns with explosion when a burning candle is brought near it. (D) The gas turns the lime water milky. The observation which needs correction is. (a) A (b) B (c) C (d) D
29. Four students observed the colour and odour of acetic acid and its reaction with sodium hydrogen carbonate. They tabulated their observation as given below.
Student Colour of acetic acid
Odour of acetic acid Action with sodium hydrogen carbonate
A B C D
colourless colourless colourles colourless
Fruity Smell of Vinegar
Odourless Smell of rotten egg
Gas evolves without bubbles Brisk effervescence
gas evolves without bubbles Brisk effervescence
The correct set of observation is that of student : (a) A (b) B (c) C (d) D
A
B
C
D
(a) A (b) B (c) C (d) D
30. 5 mL of ethanoic acid was taken in two test tubes I and II each. Blue and red litmus paper were dipped into test tube I and solid sodium hydrogen carbonate was added to test tube II. The following observations were reported : (A) Red litmus turned blue in I and no change was observed in II. (B) Blue litmus turned red in I and brisk effervescence was observed in II. (C) Red litmus turned blue in I and a gas of odour like vinegar evolved in II. (D) Blue litmus turned red in I and a gas which supports combustion evolved in II. The observation which correctly represents the characteristics of ethanoic acid is : (a) A (b) B (c) C (d) D