Question

In a gaseous reaction of the type, $aA+bB\to cC+dD$, which is wrong?

• A. a litres of A combines with b litres of B to give C and D
• B. a mol of A combines with b mol of B to give C and D
• C. a g of A combines with b g of B to give C and D
• D. a molecules of A combines with b molecules of B to give C and D

Answer 1

Answer: (C)

a g of A combines with b g of B to give C and D

The option C which states, "$a$ g of A combines with $b$ g of B to give C and D" is incorrect.
The correct statement is "$a\times M_A$ g of A combines with $b\times M_B$ g of B to give C and D".
Here, $M_A$ and $M_B$ are the molar masses of A and B.