Statement 1: Acid strength increases in the order given as `HFltltHClltltHBrltltHI`.
Statement 2: 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

A. Both Statement I and Statement II are false
B. Statement I is correct but Statement II is false
C. Statement I is incorrect but Statement II is true
D. Both Statement I and Statement II are true

Answer

D

Explanation

In the modern periodic table, on going down the group as the size of halogen atom increases, the H – X bond length also increases as a result the bond enthalpy decreases. Hence, the acidic strength also increases. So, the correct order of acidic strength is
`HI gt HBr gt HClgt HF `