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Chemistry General Science Test Hard Mode 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
One mole of a gas refers to
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The number of molecules in one litre of gas
The number of molecules in one gram of gas
The number of molecules contained in 12 grams of
12
C isotope
The number of molecules in 22.4 liters of a gas at S.T.P.
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Question # 3
Which of the following has linear shape?
Choose an answer
SP
SP
2
SP
3
None of the above
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Question # 4
Heating a micture of sodium benzoate and soda lime gives
Choose an answer
Benzene
Methane
Sodium benzoate
Calcium benzoate
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Question # 5
Setting of cement is an
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Exothermic reaction
Endothermic reaction
Neither exothermic nor endothermic
None
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Question # 6
The most reactive compound for electrophilic nitration will be
Choose an answer
Benzyl chloride
Benzoic acid
Nitrobenzene
Chlorobenzene
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Question # 7
The formula of nitre is
Choose an answer
KNO
3
NaNO
3
NaCI
Na
2
CO
3
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Question # 8
In a reversible chemical reaction having two reactants in equilibrium if the concentration of the reactants are doubled then the equilibrium constant will
Choose an answer
Also be doubled
Be halved
Becomes one fourth
Remains the same
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Question # 9
The substance used as a smoke screen in warfare is
Choose an answer
SiCI
4
PH
3
PCI
5
Acetylene
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Question # 10
The mass of the neutron is of the order of
Choose an answer
10
-23
kg
10
-24
kg
10
-26
kg
10
-27
kg
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Question # 11
Gooch crucible used to filter the solution of
Choose an answer
H
2
SO
4
HCI
KMnO
4
Both B & C
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Question # 12
The most reactive compound for electrophilic nitration will be
Choose an answer
Benzyl chloride
Benzoic acid
Nitrobenzene
Chlorobenzene
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Question # 13
Phenol is heated with CCl
4
and alkaline KOH when salicylic acid is produced. The reaction is known as
Choose an answer
Frledel-Craft reaction
Riemer-Tiemann's reaction
Rosenmund's reaction
Sommelet reaction
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Question # 14
A clathrate may be defined as a
Choose an answer
Cage compound
Liquid crystal
Mixture
Solid solution
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Question # 15
The order of reactivity of halogens in aliphatic substitution reactions is
Choose an answer
Br2 > C12 > F2
Cl2 > Br2 > F2
Cl2 C12 > Br2
F2 > Br2 > C12
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Question # 16
Which of the following is directly related to Qualitative analysis?
Choose an answer
Identification
Separation
Measurement
Calculation
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Question # 17
The formula of nitre is
Choose an answer
KNO
3
NANO
2
NaCl
Na
2
CO
3
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Question # 18
In cold countries ethylene glycol is added to water in radiators of cars during winter. It results in
Choose an answer
Lowering in b.pt.
Reducing viscity
Reducing specific heat
Lowering in freezing pt.
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Question # 19
Natural fertilizer provides phosphorus to plants in the form of P
2
O
5
Choose an answer
1.2 kg
2.2 kg
3.2 kg
4 kg
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Question # 20
2 g of oxygen contains number of atoms equal to that in
Choose an answer
0.5 g of hydrogen
4 g of sulphur
7 g of nitrogen
2.3 g of sodium
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Question # 21
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 # 22
1-Chloropropane has two isomers. It is an example of
Choose an answer
Chain isomerism
Position isomerism
Function group isomerism
Meramerism
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