Chemistry Past Paper Questions

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Q 641:Photosynthesis process produces:
A
Starch
B
Cellulose
C
Sucrose
D
Glucose
Multan, 2018
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Q 642:Temporary hardness of water can be removed by adding:
A
Limestone
B
Slaked lime
C
Quick lime
D
Washing soda
Multan, 2018
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Q 643:Temporary hardness of water is because of:
A
Ca(HCO₃)₂
B
CcCO3
C
MgCO₃
D
MgSO₄
Multan, 2018
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Q 644:The element is found in most abundance in earth's crust:
A
Oxygen
B
Aluminium
C
Silicon
D
Argon
Multan, 2018
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Q 645:The isotopic C-12 is present in abundance of:
A
96.9 %
B
97.6 %
C
99.7 %
D
98.9 %
Multan, 2018
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Q 646:The most common example of Corrosion is:
A
Chemical Decay
B
Rusting of Iron
C
Rusting of aluminium
D
Rusting of tin
Multan, 2018
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Q 647:The oxidation number of Chromium in K2Cr2O7 is:
A
+2
B
+6
C
+7
D
+14
Multan, 2018
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Q 648:Nelson's cell is used to prepare Caustic Soda along with gases. ______ gas is produced at Cathode from the ggiven.
A
Cl2
B
H2
C
O3
D
O2
Multan, 2018
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Q 649:Of the following non-metals ________ is extremely hard.
A
graphite
B
Phosphorus
C
Iodine
D
Diamond
Multan, 2018
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Q 650:One atmospheric pressure is equal to _______ pascals.
A
101325
B
10325
C
106075
D
10523
Multan, 2018
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Total MCQs: 1548Page 65 of 155
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