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NAT II Physical Science Chemistry MCQs With Answers
Question # 1
Calcium acetate when dry distilled gives
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Formaldehyde
Acetaldehyde
Acetone
Acetic anhydride
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Question # 2
Pollutant of automobile exhausts that affects nervous system/produces mental diseases is
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Mercury
Lead
Nitrogen oxide
Sulphur oxide
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Question # 3
A clathrate may be defined as a
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Cage compound
Liquid crystal
Mixture
Solid solution
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Question # 4
In N.W.F.P the phosphate fertilizers are produced at
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D.I.Khan
Haripur
Nowshera
Dargai
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Question # 5
Sulphure dioxide affects
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Cell wall
Plasmodesmata
All membrane systems
Nucleus
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Question # 6
Hess's law deals with
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Changes in heat or reaction
Rate of reaction
Equilibrium constant
Influence of pressure on volume of a gas.
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Question # 7
Water (H
2O
) is liquid while hydrogen sulphide (H
2
S) is a gas because
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Water has higher molecular weight
Hydrogen sulphide is a weak acid
Sulphure has high electronegativity than oxygen
Water molecules associate through hydrogen
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Question # 8
The digestion of fats in the intestines is aided by
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Diffusion
Protection
Peptization
Emulsification
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Question # 9
Which is the most volatile compound?
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HI
HCl
HBr
HF
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Question # 10
Aluminothermy used for on the spot welding of large iron structure is based upon the fact that
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As compared to iron, aluminium has greater affinity for oxygen
As compared to aluminium, iron has greater affinity for oxygen
Refraction between aluminium and oxygen is endothermic
Reaction between iron and oxygen is endothermic.
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Question # 11
An electrolyte
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Forms complex ions in solution
Gives ions only when electricity is passed
Possesses ions even in solid state
Gives ions only when dissolved in water
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Question # 12
Detergents are
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Synthetic products
Natural products
Both A and B
None of the above
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Question # 13
Atmosphere of big/metropolitan cities is polluted most by
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Automobile exhausts
Pesticide residue
Household waste
Radio-active fall out
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Question # 14
By using the fluted filter paper rate of filtration is
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Increased
Decreased
Filtration is constant
Having no effect
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Question # 15
2 g of oxygen contains number of atoms equal to that in
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0.5 g of hydrogen
4 g of sulphur
7 g of nitrogen
2.3 g of sodium
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Question # 16
Which inorganic precipitate acts as semipermeabale membrane?
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Calcium sulphate
Barium oxalate
Nickel phosphate
Copper ferrocyanide
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