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NAT I Medical Chemistry MCQs With Answers

Question # 1

2 g oxygen contains number of atoms equal to that in

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0.5 g of hydrogen

4 g of sulphur

7 g of nitrogen

2.3 g of sodium

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Question # 2

Which of the following fluorides does not exist?

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NF₅

PF₅

AsF₅

SbF₅

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Question # 3

Natural fertilizer provides potassium in the form of K₂O (potash)

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1.5 kg

3 kg

4.5 kg

6.5 kg

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Question # 4

Water (H2O) is liquid while hydrogen sulphide (H₂S) is a gas because

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Water has higher molecular weight

Hydrogen sulphide is a weak acid

Sulphur has high electronegativity than oxygen

Water molecules associate through hydrogen bonding.

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Question # 5

AI is more reactive than Fe but AI is less easily corroded than Fe Because

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It is a noble metal

Oxygen forms a protective reaction easily with water

Iron undergoes reaction easily with water

Fe form mono and divalent ions.

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Question # 6

Which of the following is different from the other three oxides?

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MgO

SnO

ZnO

Cr₂O₃

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Question # 7

Bleaching action of bleaching powder is due to the liberation of

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O₂

OCI^-

CI₂

CI^-

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Question # 8

Which of the following metal exhibits more than one oxidation?

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Question # 9

Pollutant of automobile exhausts that affects nervous system/produces mental diseases is

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Mercury

Lead

Nitrogen oxide

Sulphur oxide

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