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Q:

What is the ratio of masses of hydrogen and oxygen in the water?

A) 1 : 4 B) 1 : 8
C) 1 : 16 D) 1 : 64
 
Answer & Explanation Answer: B) 1 : 8

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Q:

Release of which among the following is the primary reason for depletion of the ozone layer?

A) Nitrous oxide B) Hydrogen dioxide
C) Chlorofluro carbon D) Carbon monoxide
 
Answer & Explanation Answer: C) Chlorofluro carbon

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Q:

The maximum fixation of solar energy is done by

A) Bacteria B) Protozoa
C) Fungi D) Green plants
 
Answer & Explanation Answer: D) Green plants

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Q:

Which of the following compounds is the strongest acid?

A) p-nitrophenol B) phenol
C) m-nitrophenol D) p-cresol
 
Answer & Explanation Answer: A) p-nitrophenol

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Q:

The series of processes by which nitrogen and its compounds are inter-converted in the environment and in living organisms is called _____ .

A) Absorption of Nitrogen B) Ammonification
C) Nitrogen Fixation D) Nitrogen Cycle
 
Answer & Explanation Answer: D) Nitrogen Cycle

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Q:

Which of the following statement is CORRECT?

A) Gold and Silver are not ductile. B) Phophorus and Nitrogen are ductile.
C) Copper and Platinum are ductile. D) Sulphur and Phophorus are sonorous
 
Answer & Explanation Answer: C) Copper and Platinum are ductile.

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Q:

Absolute Zero is defined as

A) The temperature at which all molecular motion ceases B) At which water boils at 298K
C) At which liquid Helium boils D) At which the volume becomes zero
 
Answer & Explanation Answer: A) The temperature at which all molecular motion ceases

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Q:

By which of the following processes are metals of high reactivity extracted from purified molten ore?

A) Reduction by an appropriate reducing agent B) Roasting
C) Electrolysis D) Calcination
 
Answer & Explanation Answer: C) Electrolysis

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