General Science Questions

Q:

Which gas in the atmosphere is essential for respiration?

A) Argon B) Carbon dioxide
C) Oxygen D) Nitrogen
 
Answer & Explanation Answer: C) Oxygen

Explanation:

Inhaling of oxygen and releasing of carbon dioxide to make our living is the process called as respiration. We know that, air is a mixture several gases like 78% of nitrogen, 21% of oxygen and several other gases with watervapour.

 

Hence, Oxygen is essential for respiration process.

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Q:

Hormone that helps regulate calcium balance

A) endocrine B) parathyroid
C) pancreas D) None of the above
 
Answer & Explanation Answer: B) parathyroid

Explanation:

PTH - Parathyroid hormone which balances calcium levels if they are low.

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Q:

Which of the following is known as thinnest layer of the earth?

A) Core B) Mantle
C) Crust D) None of the above
 
Answer & Explanation Answer: C) Crust

Explanation:

The thinnest layer is crust. It is about 100km. Where as mantle ranges upto 2900 km and the inner most core ranges upto 6300km.

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Q:

The transfer of minerals from top soil to subsoil through soil­water is called?

A) Percolation B) Conduction
C) Leaching D) Transpiration
 
Answer & Explanation Answer: C) Leaching

Explanation:
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Q:

The shape of our Milky way galaxy is

A) Spherical B) Oval
C) Circular D) None of the above
 
Answer & Explanation Answer: A) Spherical

Explanation:

The shape of our Milky way galaxy is Spherical.

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Q:

An enzyme speeds up a reaction by

A) raising the activation energy B) absorbing energy
C) lowering the activation energy D) None of the above
 
Answer & Explanation Answer: C) lowering the activation energy

Explanation:

An enzyme speeds up a reaction by lowering the activation energy which is done by catalysts to increase the rate.

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Q:

Activation of the receptors by stimuli is called

A) Perception B) Habituation
C) Adaptation D) Sensation
 
Answer & Explanation Answer: D) Sensation

Explanation:
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Q:

Which one of the following is not a type of coal?

A) Anthracite B) Lignite
C) Peat D) Siderite
 
Answer & Explanation Answer: D) Siderite

Explanation:
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