HARDMCQ SINGLEJEE Mains ChemistryInorganic Chemistryp -Block Elements (group 15-18)Achiever Section
Assertion: HNO₃ is a stronger acid than HNO₂. Reason: In HNO₃ there are two nitrogen to oxygen bonds whereas in HNO₂ there is only one.
A.A✓ Correct
B.B
C.C
D.D
Explanation
Among nitrous acid and nitric acid, nitric acid is a stronger acid. This is due to the fact that in nitric acid, the number of oxygen attached to nitrogen is 2 (whereas it is 1 for nitrous acid) and thus it can withdraw electron density from the O – H bond effectively making it weaker. Thus, it can lose a proton readily and is a stronger acid. Therefore, the correct answer is an option (a) i.e. (A) Both A and R are true and R is the correct explanation of A.
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