Question

Two chemical species $X$ and $Y$ combine together to form a product $P$ which contains both $X$ and $Y$

$X+Y\to P$

$X$ and $Y$ cannot be broken down into simpler substances by simple chemical reactions. Which of the following concerning the species $X,Y$ 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: (D)

(i), (iii) and (iv)

X and Y are elements as they can not be broken down into simpler substances. They combine in fixed proportion to give compound P.

Hence it is (i), (iii) and (iv).