Question

Two chemical substances X and Y combine together to form a product P which contains both X and Y X + Y â 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 ?
(i) P is a compound
(ii) X and Y are compounds
(iii) X and Y are elements
(iv) P has a fixed composition
(a) (i), (ii) and (iii)
(b) (i), (ii) and (iv)
(c) (ii), (iii) and (iv)
(d) (i), (iii) and (iv)

Answer 1

Answer is Option (d)

Explanation:

• X along with Y with the help of chemical reactions got broken into simpler substances, hence we can say X & Y as Elements or Option (d)

A compound is a substance made up of two or more elements chemically combined in a fixed proportion by mass, therefore, P is a compound, having a fixed composition.

For Example - $C + O_2 --> CO_2$

Carbon combines with oxygen to result in Carbon dioxide which is a compound and carbon, oxygen are elements.

Answer 2

Answer:

(i) X and Y are elements

(||) P has a fixed composition

(|||) P is a compound