Chemistry MCQ Questions Answers – Practice Set Part 3


21) Which is not a type of elements ?

a)Metals

b)Non Metals

c)Metalloids

d)Gases

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Option – d)

22) Natural rubber is a polymer derived from ?

a)ethylene

b)propylene

c)isoprene

d)butadiene

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Option – c)

23) Which one is an organic Acid ?

a)Sulphuric

b)Citric

c)Nitric

d)Phosphoric

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Option – b)

24) Faraday’s Law is associated with

a)Reaction of gases

b)Pressure of gases

c)Electrolysis

d)Temperature and pressure

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Option – c)

25) Permanent hardness of water is due to the presence of ?

a)Magnesium bicarbonate

b)Calcium bicarbonate

c)Sodium bicarbonate

d)Calcium sulphate

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Option – d)

26) Mass number of a nucleus is

a) the sum of the number of neutrons and protons

b) always more than the atomic weight

c) always less than its atomic number

d) None of these

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Option – a)

27) The organic reaction represented by equation CH3 – CH = O + H2NOH gives CH3 – CH – NH + H2O is an example of

a) an addition reaction

b) a condensation reaction

c) an oxidation reaction

d) an elimination reaction

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Option – b)

28) The gas used in the manufacture of vanaspati from vegetable oil is

a) hydrogen

b) oxygen

c) nitrogen

d) carbon dioxide

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Option – a)

29) The first metal used by man was

a) iron

b) copper

c) gold

d) bronze

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Option – b)

30) The isomerism which exists between CH3CHCI2 and CH2CI. CH2CI is

a) chain isomerism

b) functional group isomerism

c) positional isomerism

d) metamerism

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Option – c)