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SCIENCE
SCIENCE MOCK TEST SET 9
January 14, 2016
0

1. Sodium thiosulphate is used in photography because

1. It is an oxidising agent
2. It is a reducing agent
3. It reacts with light
4. It helps in fixing the photograph

Answer

4

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2. When milk is churned, the cream is separated from it due to

1. Frictional force
2. Cohesive force
3. Gravitational force
4. Centrifugal force

Answer

4

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3. The water in an open pond remains cool even in hot summer because

1. Of continuous evaporation of water
2. Water radiates heat more rapidly than the atmosphere
3. Water absorbs heat less rapidly than the atmosphere
4. None of these

Answer

1

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4. Distribution of electric power from one place to another is done at high A.C. voltage because

1. Wastage of electricity is minimized
2. Stealing of electric wires is prevented
3. Electricity spreads in very short time
4. It adds brightness

Answer

1

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5. Nights are cooler in the deserts because

1. Sand radiates heat less quickly as compared to earth
2. The sky is generally clear
3. Sand radiates heat more quickly as compared to earth
4. The sky is generally cloudy

Answer

3

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6. Which one of the following pairs is correctly matched?

1. Madam Curie – X – ray
2. Albert Einstein – Photoelectric effect
3. Linus Pauling – Electron
4. C. V. Raman – Stark effect

Answer

2

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7. The Red Data Book is famous for

1. Extinct plants and animals
2. Extinct plants only
3. Endangered plants and animals
4. Endangered plants only

Answer

3

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8. The AIDS virus affects the growth of

1. Haemoglobin
2. RBCs in blood
3. T- cells in blood
4. Grey cells in brain

Answer

3

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9. Thalassaemia is a hereditary disease affecting

1. Kidney
2. Lungs
3. Blood
4. Brain

Answer

3

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10. The vector of the microbes which causes the dengue fever is

1. A mosquito
2. Housefly
3. Sandfly
4. None of these

Answer

1

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