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:D
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)
Explanation: Here X and Y cannot be further broken down into simpler substances, hence they are elements while P which made up of X and Y is a compound as it can be broken down to its elements. Compounds have a fixed composition.