Question

Two chemical substances X and Y combine together to form a product P which contains both X and Y X + Y 􀁯 P
X and Y cannot be broken down into simpler substances by simple chemical reactions. Which of the following  statements concerning X, Y and P are correct ?

1. P is a compound
2. X and Y are compounds
3. X and Y are elements
4. P has a fixed composition

विकल्प

• (i), (ii) and (iii)

• (i), (ii) and (iv)

• (ii), (iii) and (iv)

• (i), (iii) and (iv)

Answer 1

(i), (iii), and (iv)

Statements (i), (iii), and (iv) are correct. When two elements combine in a chemical reaction to give a product, the product is a compound. Composition of a compound has a fixed ratio and its properties are different from the elements participating in the reaction.