Preparation and Properties of Hydrogen, Oxygen, Nitrogen and Carbon dioxide, Oxidation and Reduction NDA Questions

NDA Chemistry

Preparation and Properties of Hydrogen, Oxygen, Nitrogen and Carbon dioxide, Oxidation and Reduction MCQ Questions


7.
In the laboratory, hydrogen gas is commonly prepared by the reaction of granulated zinc with:
A.
Concentrated nitric acid
B.
Distilled water at room temperature
C.
Sodium hydroxide solution only
D.
Dilute hydrochloric acid or dilute sulphuric acid
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ANSWER :
D. Dilute hydrochloric acid or dilute sulphuric acid
8.
Dilute nitric acid is generally avoided for the laboratory preparation of hydrogen gas by reaction with a metal because:
A.
It does not react with metals at all
B.
It reacts too slowly to be useful
C.
It produces only oxygen gas instead
D.
Nitric acid is a strong oxidising agent and reduces the liberated hydrogen further to oxides of nitrogen or water
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ANSWER :
D. Nitric acid is a strong oxidising agent and reduces the liberated hydrogen further to oxides of nitrogen or water
9.
On an industrial scale, hydrogen is manufactured in large quantities by passing steam over hot coke. This process is commonly known as:
A.
The Solvay process
B.
The Contact process
C.
The Bosch process (steam-coke reaction producing water gas)
D.
The Haber process
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ANSWER :
C. The Bosch process (steam-coke reaction producing water gas)
10.
Electrolysis of acidified/alkaline water produces hydrogen gas at the:
A.
Cathode
B.
Both electrodes equally
C.
Neither electrode
D.
Anode
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ANSWER :
A. Cathode
11.
During the electrolysis of water, hydrogen and oxygen gases are liberated in the volume ratio of:
A.
1:1
B.
2:1
C.
3:1
D.
1:2
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ANSWER :
B. 2:1
12.
The commercial process in which hydrocarbons/natural gas (methane) react with steam in the presence of a nickel catalyst at high temperature to produce hydrogen is called:
A.
Steam reforming
B.
Fractional distillation
C.
The Ostwald process
D.
Fermentation
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ANSWER :
A. Steam reforming