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NAT II Physical Science Chemistry MCQs With Answers
Question # 1
The osmotic pressure of solution increases if
Choose an answer
Temperature is decreased
Solution constant is increased
Number of solute molecules are increased
Volume is increased
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Question # 2
Which of the following has linear shape?
Choose an answer
SP
SP
2
SP
3
None of the above
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Question # 3
Which of the following is a colligative property?
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Melting point
Osmotic pressure
Freezing point
Sublimation temperature
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Question # 4
A cell constant is generally found by measuring the conductivity of aqueous solution of
Choose an answer
BaCl
2
KCl
NaCl
MgCl
2
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Question # 5
According to MO theory, the species O
+
2
Choose an answer
Bond order of 2.5
Three unpaired electrons
Diamagnetic character
Stability lower then O
2
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Question # 6
The addition of HBr is easiest with
Choose an answer
CH2 = CHCl
CICH = CHCl
CH3 - CH = CH2
(CH3)2 C = CH2
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Question # 7
Addition of iron fillings to CuSO
4
solution caused precipitation of Cu owing to the
Choose an answer
Reduction of Cu
2+
Oxidation of Cu
2+
Reduction of Fe
Reduction of Fe
3+
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Question # 8
Aluminothermy used for on the spot welding of large iron structure is based upon the fact that
Choose an answer
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 # 9
Ionic solids with defects, contain
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Equal number of cation and anion vacancies
Interstitial anions and anion vacancies
Cation vacancies only
Cation vacancies and interstitial cations
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Question # 10
What quantity of limestone (CaCO
3
) on heating will give 56 kg of CaO?
Choose an answer
1000 kg
56 kg
44 kg
100 kg
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Question # 11
For most of the chemical reactions the rate of reaction
Choose an answer
Increase as the reaction proceeds
Decrease as the reaction proceeds
May increase or decrease during the reaction
Remains constant as the reaction proceeds
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Question # 12
The dimension of rate constant of second order reaction involves
Choose an answer
Neither time nor concentration
Only time
Time and concentration
Time and square of concentration
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Question # 13
Magnesium keeps on burning in
Choose an answer
N
2
CO
2
N
2
O
N
2
as well as CO
2
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Question # 14
Dolomite has the composition
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KCL.MgCL
2
.6H
2
O
Na
3
AIF
6
CaCO
3
.MgCO
3
CaCL
2
.MgCl
2.
6H
2
O
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Question # 15
Which is not a a colligative property?
Choose an answer
Osmotic pressure
Lowering of vapour pressure
Depression of freezing point
Elevation of boiling point
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Question # 16
The pure crystalline substance on being heated gradually first forms turbid liquid at constant temperature and still at higher temperature turbidity completely disapp-ears. The behaviour is a characteristic of substance forming
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Allotropic crystal
Liquid crystals
Isomeric crystals
Isomorphous crystals
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