NEET2021Chemistryp Block Elements (Group 15, 16, 17 & 18)Actual
Statement I: Acid strength increases in the order given as HF < < HCl < < HBr < < HI Statement II: As the size of the elements F ,   Cl ,   Br ,   I increases down the group, the bond strength of HF ,   HCl HBr and HI decreases and so the acid strength increases. In the light of the above statements, choose the correct answer from the options given below.
Options
- ABoth Statement I and Statement II are true.
- BBoth Statement I and Statement II are false.
- CStatement I is correct but Statement II is false.
- DStatement I is incorrect but Statement II is true.
Correct answer
A. Both Statement I and Statement II are true.
Step-by-step solution
Acidic strength of hydracids increases in order HF ≪ HCl ≪ HBr ≪ HI So, statement-I is true The above order of acidic strength is due to decrease in bond strength. As the size of atom increases, bond length increases and bond strength decreases. Thus, statement I and statement II are true