Q.

Which of the following statements about a compound is/are incorrect?I. A molecule of a compound has atoms of different elements.II. A compound cannot be separated into its constituent elements by physical methods of separation. III. A compound retains the physical properties of its constituent elements.IV. The ratio of atoms of different elements in a compound is fixed.

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a

Only III

b

Only II

c

I and IV

d

III and IV

answer is A.

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Detailed Solution

A compound do not retain the physical properties of its constituent elements. It usually retains the chemical properties of its constituent atoms.
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Which of the following statements about a compound is/are incorrect?I. A molecule of a compound has atoms of different elements.II. A compound cannot be separated into its constituent elements by physical methods of separation. III. A compound retains the physical properties of its constituent elements.IV. The ratio of atoms of different elements in a compound is fixed.