Chemistry Past Paper Questions

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Q 1131:For the reaction between PCl3 and Cl2 to form PCl5 the units of Kc are:
A
mol-1dm-3
B
mol-1dm3
C
mol dm-3
D
mol dm3
Sargodha, 2017
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Q 1132:For the reaction H2 + I2 ⇌ 2HI, the expression for the equilibrium constant is:
A
Kc = [HI]2 / [H2][I2]
B
Kc = [H2][I2] /[HI]2
C
Kc = [2HI] / [H2][I2]
D
Kc = [H2][I2] / [2HI]
Sargodha, 2017
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Q 1133:Glucose is a:
A
Hexahydroxy Aldehyde
B
Pentahydroxy aldehyde
C
Pentahyroxy ketone
D
Hexahydroxy keton
Sargodha, 2017
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Q 1134:If Kw = [H+][OH-] = 1.0 x 10-14 at 25 °C. What is the concentration of H+ in pure water at 25oC?
A
1.0 x 107 mol dm-3
B
1.0 x 10-7 mol dm-3
C
1.0 x 10-14 mol dm-3
D
1.0 x 1014 mol dm-3
Sargodha, 2017
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Q 1135:Rickets disease is caused by the deficiency of:
A
Vitamin D
B
Vitamin A
C
Vitamin E
D
Vitamin C
Sargodha, 2017
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Q 1136:In periodic table the first period is called:
A
Long period
B
Normal Periods
C
Short period
D
Very long periods
Sargodha, 2017
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Q 1137:Industrial chemistry deals with the manufacturing of compounds:
A
In the laboratory
B
On micro scale
C
On commercial scle
D
On economic scale
Sargodha, 2017
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Q 1138:Melting point of Sodium is:
A
650°C
B
97°C
C
496°C
D
100°C
Sargodha, 2017
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Q 1139:How many times liquids are denser than gases?
A
100 Times
B
1000 times
C
10000 times
D
100000 times
Sargodha, 2017
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Q 1140:Ice float on water because:
A
Ice is denser
B
Ice is crystalline in nature
C
Water is denser than ice
D
Water Molecules move Randomly
Sargodha, 2017
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Total MCQs: 1548Page 114 of 155
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