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Chemistry General Science Test Medium Mode MCQs With Answers
Question # 1
Styrene has empirical formula CH, and there is 92.2%C and 7.75% hydrogen. If molar mass is 104g mol¯, what will be integral multiple (n) to get molecular formula:
Choose an answer
2
4
6
8
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Question # 2
The largest item which is recycled is
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newspaper
plastic
aluminium
oil
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Question # 3
The B.P of H2O at Murree Hills is
Choose an answer
99.8C
98°C
100C°
89°C
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Question # 4
The amount of heat absorbed when one mole of a liquid is changed into vapours at its boiling point is called
Choose an answer
Heat of sublimation
Heat of vaporization
Heat of fusion
Enthalpy change
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Question # 5
Choose the example having hexagonal system:
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graphite
sugar
sulphur
diamond
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Question # 6
At which oxidation state Cu achieves electronic configuration of Zn+2
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0
+2
+1
+3
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Question # 7
One mole of SO2 contains
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6.022 x 10(23) atoms of oxygen
6.022x 10 ê23 atoms of sulfur
18.1x 10 (23) molecules of SO2
4 g molecule of SO2
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Question # 8
At higher temperature isotherm of Boyle's law moves away from both axis, is due to increase in
Choose an answer
pressure
No. of moles
Volume
all of these
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Question # 9
Anline is a derivative of:
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alkane
alkene
aromatic hydrocarbon
alicyclic
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Question # 10
Boiling point of H
2
O is higher than that of HF although F is more electronegative than O. It is due to
Choose an answer
stronger dipole dipole forces in H
2
O
H
2
O is neutral HF is acidic
H
2
O is angular, but HF is linear
number of hydrogen bonds more in H
2
O
than in HF
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Question # 11
All gases liquefly before reaching at
Choose an answer
273
°K
373
°K
0 K
73
°C
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Question # 12
Which is the chain isomer of n-pentane
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Isopentane
Neopentene
N-pentene
Isopentene
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Question # 13
The percentage of methane in natural gas is
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50%
60%
85%
90%
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Question # 14
Which of the following solution have zero pH
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1 M HCI
MH
2
SO
4
0.1 M HNO
3
1 M CH
3
COOH
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Question # 15
Which of the following oxides is peroxide?
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Na
2
O
2
MnO
2
BaO
SO
2
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Question # 16
Which one of the following is (m-xylene)
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1,2 dimethyl benzene
1,3 dimethyl benzene
1,5 dimethyl benzene
1,4 dimethyl benzene
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Question # 17
Purines include
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Adenine
Guanine
Both a and b
None
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Question # 18
Which of the following in an example of reversible reaction
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Question # 19
The Zwitter ion is also called
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International salt
Internal salt
No salt
None of these
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Question # 20
Enthalpy of neutralization of all the strong acids and strong bases has the same value because
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Neutralization leads to the formation of salt and water
Strong acids and bases are ionic substances
Acid always give rise to H
+
ions and bases always furnish OH
-
ions
The net chemical change involve the combination of H
+
and OH
-
ions to form water
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Question # 21
Phosphide ion has the electronic structure similar to that of
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Nitride ion
Fluoride ion
Sodium ion
Chloride ion
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Question # 22
Dehydration of glycerol give
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Propane
Propene
Acrolein
Benzene
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