Chemistry Past Paper Questions

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Q 961:The molecular formula of Decane is:
A
C10H22
B
C10H20
C
C10H18
D
C10H21
Lahore, 2017
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Q 962:The oxidation of alkenes produce:
A
Glyoxal
B
Glycol
C
Oxalic acid
D
Formic acid
Lahore, 2017
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Q 963:The percentage of nitrogen in air is:
A
70%
B
78%
C
21%
D
20%
Lahore, 2017
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Q 964:The molecule which has triple covalent bond:
A
H2
B
O2
C
N2
D
C2H4
Lahore, 2017
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Q 965:The most reactive metal is :
A
Sodium
B
Zinc
C
Copper
D
Gold
Lahore, 2017
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Q 966:The oxidation number of chromium in K2Cr2O7 is:
A
+2
B
+6
C
+7
D
+14
Lahore, 2017
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Q 967:The oxidation number of Cl in KClO3 is:
A
+4
B
+5
C
+6
D
+7
Lahore, 2017
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Q 968:The isotope used to generate electricity in nuclear reactor is:
A
C-12
B
U-235
C
Co-60
D
P-32
Lahore, 2017
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Q 969:The mass of one molecule of water is:
A
18 amu
B
19 amu
C
20 amu
D
25 amu
Lahore, 2017
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Q 970:The molar mass of H2SO4 is:
A
98 g
B
98 amu
C
9.8 g
D
9.8 amu
Lahore, 2017
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Total MCQs: 1548Page 97 of 155
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