An astronaut inside a spacecraft is in a state of weightlessness. This implies that?

A: Gravity inside the spacecraft ceases to act

B: The mass of the astronaut is reduced to zero

C: The astronaut is outside the influence of the earth's gravitational force

D: The astronaut and the spacecraft are both in a free-failing state

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The astronaut and the spacecraft are both in a free-failing state

Biopsy is done on tissues taken from_____?

A: Animal body

B: Human body

C: Living body

D: Dead body

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Living body

Rusting of Iron involves_____?

A: Oxidation

B: Reduction

C: Decomposition

D: Displacement

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Oxidation

Water has maximum density at_______?

A: 4°C

B: 0°C

C: 4° K

D: 4.8°C

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4°C

Places where the temperature of air is below freezing point of the water, the precipitation will be in the form of _____ ?

A: Lightning

B: Snow

C: Hailstorms

D: Thunders

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Snow

Deficiency diseases are caused due to the deficiency of______?

A: Vitamins

B: Proteins

C: Carbohydrates

D: Fats

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Vitamins

The study of X-rays and their medical applications is called ____ ?

A: Raciology

B: Radiology

C: Rheumatology

D: Rheology

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Radiology

What is the molecular formula for Ammonia?

A: NH2

B: NH

C: NH3

D: NH4

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NH3

Most drugs are excreted through________?

A: Skin

B: Kidney

C: Gallbladder

D: Lungs

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Kidney

Which variety of glass is heat resistant?

A: Flint glass

B: Bottle glass

C: Hard glass

D: Pyrex glass

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Pyrex glass

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