Chemistry Questions

Q:

Dried fruit like raisins when soaked in water, bulge and get filled with water. What is the scientific reason that explains this daily life event?

 

A) Osmosis B) Active Transport
C) Diffusion D) Passive Transport
 
Answer & Explanation Answer: A) Osmosis

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Q:

___________ gases absorb long wave (infrared) radiation from the earth and emit it again towards the earth.

A) Carbon dioxide B) Methane
C) Greenhouse D) Ozone
 
Answer & Explanation Answer: C) Greenhouse

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Q:

When large quantities of ___ are consumed, it tends to slow metabolic processes and to depress the central nervous system.

A) Butanol B) Propanol
C) Methanol D) Ethanol
 
Answer & Explanation Answer: D) Ethanol

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Q:

______ bond holds the atoms together within a water molecule.

A) Nonpolar covalent B) Polar covalent
C) Ionic D) Co­-ordinate
 
Answer & Explanation Answer: B) Polar covalent

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Q:

Which among the following is not a characteristic of oxidation reaction?

A) It involves addition of hydrogen B) It involves addition of oxygen
C) It involves loss of electrons D) 4) It involves addition of electronegative element
 
Answer & Explanation Answer: A) It involves addition of hydrogen

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Q:

The nitrogenous waste of Human Beings is

A) Ammonia B) Urea
C) Ammonium Nitrate D) Uric Acid
 
Answer & Explanation Answer: B) Urea

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Q:

What is the percentage of methane in biogas?

A) 90% B) 80%
C) 60% D) 75%
 
Answer & Explanation Answer: D) 75%

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Q:

What is the common name of the solution of calcium hydroxide?

A) Lime water B) Diet soda
C) Salt solution D) Vinegar
 
Answer & Explanation Answer: A) Lime water

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