Question
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+bB→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
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+bB→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+bB→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 g of A combines with b MB g of B to give c Mc g of C and d MD 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.