Chemistry Past Paper Questions

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Q 1051:Night blindness is caused due to the deficiency of which vitamin?
A
Vitamin C
B
Vitamin E
C
Vitamin D
D
Vitamin A
Rawalpindi, 2017
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Q 1052:Nitrogen and hydrogen react together to make ammonia. What will be present in equillibrium mixture? N2+3H2 ⇌ 2NH3
A
only NH3
B
N2, H2, and NH3
C
only N2 and H2
D
only H2
Rawalpindi, 2017
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Q 1053:Reactions which have comparable amounts of reactants and products at equillibrium state have _______ Kc value.
A
Very small
B
Very large
C
Moderate
D
None
Rawalpindi, 2017
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Q 1054:The Nitrogen present in Urea is used by Plants to Synthesize:
A
Sugar
B
Proteins
C
Fats
D
DNA
Rawalpindi, 2017
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Q 1055:Thousands of amino acids polymerize to form
A
Carbohydrates
B
Lipids
C
Protein
D
Vitamins
Rawalpindi, 2017
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Q 1056:The oxidation number of oxygen in OF2 is
A
+1
B
+2
C
-1
D
-2
Rawalpindi, 2017
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Q 1057:The boiling point of sodium chloride is
A
1313oC
B
1413oC
C
2313oC
D
2413oC
Rawalpindi, 2017
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Q 1058:The concept of orbit was used by
A
Rutherford
B
Bohr
C
J.J Thomson
D
Doberiener
Rawalpindi, 2017
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Q 1059:The densities of gases are expressed in term of
A
kg dm-3
B
g dm-3
C
kg cm-3
D
g cm-3
Rawalpindi, 2017
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Q 1060:One amu (atomic mass unit) is equivalent to:
A
1.66 x 10-24 mg
B
2.66 x 10-24 gm
C
3.66 x 10-24 gm
D
4.66 x 10-24 gm
Rawalpindi, 2017
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Total MCQs: 1548Page 106 of 155
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