GENERAL KNOWLEDGE

GK

CHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The molecule which has the highest percentage of ionic character among the following is
A
HF
B
HI
C
HBr
D
HCI
Explanation: 

Detailed explanation-1: -Answer: Option B Solution: HF has the highest percentage of ionic character because F has the greatest electronegativity.

Detailed explanation-2: -HF has the highest percentage of ionic character because F has the greatest electronegativity.

Detailed explanation-3: -Hence, the highest % of ionic character is exhibited by CsF.

Detailed explanation-4: -Thus, both H-F and H-I bonds are polar covalent bonds. But, electronegativity values decrease down a group and fluorine and iodine belong to the same group (Group 17) of the periodic table. Thus, fluorine is more electronegative than iodine and so H-F bond will be more polar than H-I bond.

Detailed explanation-5: -BaCl2 has the greatest ionic character, due to greater electronegativity difference between cation and anion and large size of cation.

There is 1 question to complete.