Chemistry Past Paper Questions

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Q 1281:Normally rainwater is weakly acidic because of
A
SO2
B
CO2
C
NO2
D
SO3
Gujranwala, 2016
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Q 1282:Normally rainwater is weakly acidic because of
A
SO2
B
SO3
C
NO2
D
CO2 gas
Gujranwala, 2016
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Q 1283:Temporary hardness is because of
A
Ca(HCO₃)₂
B
CaCO3
C
MgCO₃
D
MgSO₄
Gujranwala, 2016
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Q 1284:The bond angle H-O-H in water is:
A
104.5o
B
104.6o
C
104.7o
D
104.8o
Gujranwala, 2016
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Q 1285:The chemical formula of chalcopyrite is
A
Cu2S
B
CuFeS2
C
CuS
D
FeS
Gujranwala, 2016
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Q 1286:The chemical formula of chloroform is
A
CH3Cl
B
Ch2Cl
C
CHCl3
D
CCl4
Gujranwala, 2016
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Q 1287:The Molar Mass of H2SO4 is:
A
98 gm
B
92 amu
C
9.8 gm
D
9.8 amu
Gujranwala, 2016
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Q 1288:The most abundant element occurring in the oceans is:
A
Oxygen
B
hydrogen
C
Nitrogen
D
Silicon
Gujranwala, 2016
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Q 1289:Oxidation number of all of the elements in free state is:
A
0
B
1
C
2
D
3
Gujranwala, 2016
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Q 1290:Oxidation number of hydrogen in metal hydrides is:
A
+1
B
-1
C
+2
D
-2
Gujranwala, 2016
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Total MCQs: 1548Page 129 of 155
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