Question

At noon, the Sun appears white as *

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(a) blue colour is scattered the most

(b) red colour is scattered the most

(c) light is least scattered

 

(d) all the colours of the white light are scattered away

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4. The air layer of atmosphere whose temperature is less then the hot layer behave as optically *

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(a) denser medium

 

(b) rarer medium

(c) inactive medium

(d) either denser or rarer medium

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5. The splitting of white light into different colours on passing through a prism is called----- ----- *

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Dispersion

 

 

6. What causes advance sunrise and delayed sunset? *

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Phenomenon

 

Correct answers

ATMOSPHERIC REFRACTION

REFRACTION

REFRACTION OF LIGHT

atmospheric refraction

Atmospheric refraction

refraction

 

7. In a chemical reaction between sodium sulphate and barium chloride solution the white precipitates formed are of: *

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a. Hydrochloric acid

b. Barium sulphate

 

c. Chlorine

d. Sulphur

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8. The respiration process during which glucose undergoes slow combustion by combining with oxygen in the cells of our body to produce energy, is a kind of: *

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a. Exothermic process

b. Endothermic process

c. Reversible process

 

d. Physical process

Correct answer

a. Exothermic process

 

9. If a substance -------------------- during a reaction, it is said to be oxidized. *

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a. gains oxygen and loses hydrogen

b. gains oxygen or loses hydrogen

 

c. gains hydrogen and loses oxygen

d. gains hydrogen or loses oxygen.

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10. A chemical reaction does not involve: *

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a. Formation of new substances having entirely different properties than that of the reactants

b. Breaking of old chemical bonds and formation of new chemical bonds

c. Rearrangement of the atoms of reactants to form new products

d. Changing of the atoms of on element into those of another element to form new products

 

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11. One of the following processes does not involve a chemical reaction. *

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a. Melting of candle wax when heated

b. Burning of candle wax when heated

c. Digestion of food in our stomach

d. Ripening of banana

 

Correct answer

a. Melting of candle wax when heated

 

12. White silver chloride turns grey in sunlight. It is an example of ----------- reaction. *

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Decomposition

 

 

13. A solution of substance X is used for white washing. Name X. *

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Calcium oxide

 

 

14. Blood pressure is measured by an instrument called *

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(a) barometer

(b) sphygmomanometer

 

(c) photometer

(d) manometer

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15. The mode of nutrition found in fungi is: *

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(a) Parasitic nutrition

(b) Holozoic nutrition

(c) Autotrophic nutrition

(d) Saprophytic nutrition

 

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16. Here, the maximum exchange of material between blood and surrounding cells takes place *

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(a) Veins

(b) Heart

(c) capillaries

 

(d) arteries

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The respiratory pigment in human beings is *

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(a) insulin

(b) enzymes

 

(c) haemoglobin

(d) none of these

Correct answer

(c) haemoglobin

 

18. Bile juice is secreted by *

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(a) stomach

(b) pancreas

(c) small intestine

(d) liver

 

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19. Proteins after digestion are converted into-------- *

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Amona

 

Correct answers

AMINO ACIDS

amino acids

 

20. The rhythmic contraction of linings of alimentary canal is called------- *

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Perispalsis

 

Correct answers

PERISTALTIC MOVEMENTS

PERISTALSIS

PERISTALTIC

peristaltic movements

peristaltic movement

peristalsis

Peristaltic movements

Correct answer

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Answer 1

Explanation:

1)a,2.b,3.c,4.a,5.d,6.b,7.b

Answer 2

LIVER OPTION (D)

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Explanation:

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