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

The correct option is D (i), (iii) and (iv)

$X+Y\to P$

As X and Y both can not be broken down into simpler substances so they both are elements.

Also, X and Y always react in a fixed proportion and forms a compound P which does not show properties of X and Y.