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Question: In the gaseous reaction of type, \(aA+bB\to cC+dD\), which is wrong? (A) a liters of A combines wi...

In the gaseous reaction of type, aA+bBcC+dDaA+bB\to cC+dD, which is wrong?
(A) a liters of A combines with b liters 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 molecule of A combines with b molecule of B to give C and D

Explanation

Solution

To solve this type of question we have to analyze each and every option i.e. by eliminating the options which are correct. A reaction is expressed in many ways in terms of number of moles, volume etc.

Complete solution:
Let’s check each of the following statements whether they are correct or incorrect.

The first statement is a liters of A combines with b liters of B to give C and D- this statement is true as from the given equation aA+bBcC+dDaA+bB\to cC+dD we can say that a liters of A combine with b liters of B to given c liters of C and d liters of D.
The second statement is a mol of A combines with b mol of B to give C and D this statement is true as from the given equation aA+bBcC+dDaA+bB\to cC+dD we can say that a mole of A combine with b mole of B to given c mole of C and d mole of D.
The third statement is a g of A combines with b g of B to give C and D this statement is incorrect as the correct statement will be a MA{{M}_{A}} g of A combines with b MB{{M}_{B}} g of B to give c Mc{{M}_{c}} g of C and d MD{{M}_{D}} g or D. where M is the molar mass of A, B, C and D respectively.

Hence, the correct answer is option C.

Note: Stoichiometric calculation is done involving the gases to be converted between mass, number of moles and the volume of the gas. For example 1 mole of any gas at the standard temperature and pressure i.e. STP occupies a volume of 22.4L.