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Chemistry General Science Test Hard Mode MCQs With Answers
Question # 1
Vitamin A is present in
Choose an answer
Liver
Milk
Green vegetables
All
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Question # 2
Which one is primary alcohol?
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Buten-2-oI
Propan-2-oI
Butane-1-oI
2,3-Dimethylhexane-4-oI
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Question # 3
Sodium thiosulfate is used in photography because of its
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Oxidizing behaviour
Reducing behaviour
Complexing behaviour
Photochemical behaviour
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Question # 4
Detergents are
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Synthetic products
Natural products
Both A and B
None of the above
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Question # 5
Calcium acetate when dry distilled gives
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Formaldehyde
Acetaldehyde
Acetone
Acetic anhydride
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Question # 6
In a reversible chemical reaction having two reactants in equilibrium if the concentration of the reactants are doubled then the equilibrium constant will
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Also be doubled
Be halved
Becomes one fourth
Remains the same
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Question # 7
Which of the following is not present in RNA?
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Uracil
Thymine
Ribose
Phosphate
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Question # 8
Which of the following is an example of body centred cube?
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Magnesium
Zinc
Copper
Sodium
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Question # 9
The reference calomel electrode is made from which of the following?
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ZnCI
2
CuSO
4
Hg
2
CI
2
HgCI
2
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Question # 10
Addition of iron filling to CuSO
4
solution caused precipitation of Cu awing to the
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Reduction of Cu
2+
Oxidation of Cu
2+
Reduction of Fe
Reduction of Fe
3+
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Question # 11
Dehydration of glycerol give
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Propane
Propene
Acrolein
Benzene
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Question # 12
Which of these is the most widely used nitrogen fertilizer in Pakistan
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Urea
Ammonium nitrate
Ammonium Sulphate
Ammonium chloride
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Question # 13
For preparing an alkane, a concentrated aqueous solution of sodium or potassium salt of saturated carboxylic acid is subjected to
Choose an answer
Hydrolysis
Oxidation
Hydrogenation
Electrolysis
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Question # 14
Which of the following alcohols cannot be produced by treatment of aldehydes or ketones with NaBH
4
or LiAIH
4
?
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1-Propanol
2-Propanol
2-Methyl-2-propanol
Ethanol
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Question # 15
Phosphorus pentoxide finds use as
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An oxidizing agent
A reducing agent
a bleaching agent
A dehydration agent.
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Question # 16
Minamata disease is due to pollution of
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Organic waste
Oil spill in water
Industrial waste containing mercury into fishing water
Arsenic into the atmosphere
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Question # 17
1 mole of CH
4
contains
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6.02 x 10
23
atoms of H
4 g-atom of hydrogen
1.81 x 10
23
molecules of CH
4
3.0 g of carbon
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Question # 18
Saturated solution of NaCl on heating becomes
Choose an answer
Super saturated
Unsaturated
Remains saturated
None
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Question # 19
Among the alkaline earth metals the element forming predominantly covalent compounds is
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Be
Mg
Sr
Calcium
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Question # 20
Natural fertilizer provides phosphorus to plants in the form of P
2
O
5
Choose an answer
1.2 kg
2.2 kg
3.2 kg
4 kg
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Question # 21
Which of the substances Na, Hg, S, Pt and graphite can be used as electrodes in electrolytic cells having aqueous solution?
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Na, Pt and graphite
Na and Hg
Pt and graphite only
Na and S only
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Question # 22
Gooch Crucible used to filter the solution of
Choose an answer
H
2
SO
4
HCI
KMnO
4
Both B & C
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