Atoms and molecule, Structure of atom, Diversity in living living organisms, Why do we fall ill?, Natural Resources

Holiday Homework (2014 -

15)

MCQs Practical Questions based on following lessons:

Atoms and Molecules. (Chemistry)

Structure of Atom. (Chemistry)

Diversity in living organisms. (Biology)

Why do we fall ill ? (Biology)

Natural Resources. (Biology)

Atom and Molecules1) Name the Indian philosopher who found the “the smallest

invisible particles of matter” as parmanu:

(a) Pakudha Katyayama

(b) Maharishi Kanad

(c) Aryabhatt

(d) Democritus

Answer: (a) Pakudha Katyayama.

2) The number value 6.022 ×10²³ is also called

(a) Dalton’s number

(b) Avagadro’s number

(c) Atomic number

(d) Mass number

Answer: (b) Avagadro’s number.

3) The number of moles for 52g of ‘He’ is:

( Atomic mass of ‘He’: 4u)

(a) 6.022× 10²³

(b) 13

(c) 52

(d) 1

Answer: (b) 13.

4) Formula for Magnesium Chloride is:

(a) MgCl

(b) Mg2Cl

(c) MgCl2

(d) MgCl4

Answer: (c) MgCl2.

5) The percentage of Hydrogen in H2O molecule is:

(a) 5.55

(b) 11.11

(c) 44.45

(d) 88.89

Answer: (b) 11.11.

Structure of Atom

1) Proton was discovered by:

(a) Ruther ford

(b) Goldstein

(c) Chadwick

(d) J.J Thomson

Answer: (b) Goldstein.

2) Canal rays are:

(a) Negative charged particles

(b) Positive charged particles

(c) Beam of neutrons

(d) Gamma radiation.

Answer: (b) Positive charged particles.

3) ᾳ - particles are:

(a) Negative charged particles

(b) Positive charged particles Beam of neutrons

(c) Beam of neutrons

(d) Gamma radiation

Answer: (a) Negative charged particles.

4) ᾳ - particle is:

(a) A hydrogen nucleus

(b) A helium nucleus

(c) A proton

(d) A electron

Answer: (b) A helium nucleus.

5) Two elements ‘X’ and ‘Y’ have the same atomic mass but their atomic numbers are 20 and 21 respectively. ‘X’ and ‘Y’ are:

(a) Isobars

(b) Isotones

(c) Isomers

(d) Isotopes

Answer: (d) Isotopes.

Periodic Table Of Elements.

Diversity in living organisms1) Chloroplast in Spirogyra is:

(a) Spirally arranged or ribbon shaped with pyrenoids

(b) Spirally arranged without pyrenoids

(c) Circular

(d) Cup –Shaped

Answer: (a) Spirally arranged or ribbon shaped with pyrenoids.

2) Needle shaped structure in Pinus plant is:

(a) Leaf

(b) Shoot

(c) Stem

(d) Reproductive part

Answer: (a) Leaf.

3) Which among the following produce seeds?

(a) Thallophyta

(b) Bryophyta

(c) Pteridophytes

(d) Gymnosperms

Answer: (d) Gymnosperms.

4) Which of the following called “Amphibians of Plant kingdom”.:

(a) Bryophytes

(b) Algae

(c) Pteridophytes

(d) Gymnosperms

Answer: (a) Bryophytes.

5) Which one is a true fish?

(a) Jellyfish

(b) Starfish

(c) Dogfish

(d) Silverfish

Answer: (c) Dogfish.

(Note: Jellyfish is a coelenterate, Starfish is an echinoderm and Silverfish is an insect.)

Why do we fall ill?1) Which one of the following is an infectious disease?

(a) Diphtheria

(b) Diabetes

(c) Hypertension

(d) Cancer

Answer: (a) Diphtheria.

2) Elephantiasis disease can have

(a) Short-term affect on our health

(b) No affect on our health

(c) Long term affect on our health

(d) Some times bad affect on our health

Answer: (c) Long term affect on our health.

3) Ascaris worm lives in which part of human body?

(a) Kidneys

(b) Liver

(c) Small Intestine

(d) Large Intestine

Answer: (c) Small Intestine.

4) Microbes which enter the body through nose most likely affect:

(a) Liver

(b) Heart

(c) Brain

(d) Lungs

Answer: (d) Lungs.

5) Which of the following is a viral infection?

(a) Diphtheria

(b) Influenza

(c) Cholera

(d) Typhoid

Answer: (b) Influenza.

Natural Resource1) Corbett National park is famous for:

(a) Neel Gai

(b) Snakes

(c) Rhinoceros

(d) Tiger

Answer: (d) Tiger.

2) Green plants of an ecosystem are called:

(a) Producers

(b) Decomposers

(c) Consumers

(d) None of these

Answer: (a) Producers.

3) Energy flow in the ecosystem is:

(a) Unidirectional

(b) Bidirectional

(c) Multidirectional

(d) None of these

Answer: (a) Unidirectional.

4) Two important groups for detritivores are:

(a) Animal and plants

(b) Prokaryotes and Algae

(c) Prokaryotes and fungi

(d) None of these

Answer: (c) Prokaryotes and fungi.

5) In which sphere of the environment Ozone layer is located?

(a) Troposphere

(b) Stratosphere

(c) Mesosphere

(d) Thermosphere

Answer: (b) Stratosphere.

DNA