Question

Mark the correct statement:

(I) Two elements combine in more than a way to give a number of compounds.
(II) Compounds are heterogeneous.
(III) It is obtained by a chemical combination of two or more elements in a definite proportion by mass.

• A. I is correct
• B. I, II are correct
• C. II, III are correct
• D. I, III are correct

Answer 1

The correct option is D I, III are correct

Statement-I is correct. For Example- Compounds such as Nitrous oxide ($N_{2}O$), Nitrogen dioxide ($N{O}_2$), and Nitric oxide ($NO$) all are produced from two elements Nitrogen ($N$) and Oxygen ($O$). Based on the given example statement-III is also correct Compounds are homogeneous i.e. their properties are the same throughout. Hence Statement-II is incorrect.

(D) I, III are correct.