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NAT I Engineering Chemistry MCQs With Answers
Question # 1
Dilute hydrochloric acid solution cannot be concentrated by boiling beyond
Choose an answer
11%
33%
44%
22%
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Question # 2
Dehydration of glycerol give
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Propane
Propene
Acrolein
Benzene
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Question # 3
Ammonia gas used directly as a fertilizer is injected into the soil at a depth of about
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Two inches
Three inches
Five inches
Six inches
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Question # 4
Heating a mixture of sodium benzoate and soda lime gives
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Methane
Benzene
Sodium benzene
Calcium benzoate
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Question # 5
The digestion of fats in the intestines is aided by
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Diffusion
Protection
Peptization
Emulsification
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Question # 6
In which of the following elements +1 oxidation state is more stable than +3
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B
AI
Ga
Ti
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Question # 7
In a reversible chemical reaction having two reactants in equilibrium if the concentration of the reactants are doubled then the equilibrium constant will
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Also be doubled
Be halved
Becomes one fourth
Remains the same
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Question # 8
The bond angle H - O - H in ice is closest to
Choose an answer
120° , 28°
60°
90°
109°
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Question # 9
When electricity is passed through molten AI
2
O
3
+ Na
3
AIF
6
and 13.5 gms AI are deposited,the number of faraday must be
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0.5
1.0
1.5
2.0
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Question # 10
Calcium cyanamide on treatment with steam under pressure gives NH
3
and
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Calcium carbonate
Calcium hydroxide
Calcium oxide
Calcium bicarbonate
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Question # 11
When KCIO
3
is heated it decomposes into KCI and O
2
if some MnO
2
is added the reaction goes much faster because
Choose an answer
MnO
2
decomposes to give O
2
MnO
2
provides heat by reacting
Better contact is provided by MnO
2
MnO
2
acts as a catalyst
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