Question

Q. Which of the following has maximum
pk :
(1) CH₂ F COOH
(2) CH₂Cl COOH
(3) CH3COOH
(4) HCOOH​

Answer 1

Answer:

Suppose you are using a meter scale (metalic) marked 0 to 100cm .Let the scale is graduated at 20°c & you are taking reading at 40°c . Let the scale becomes 101cm but you count it 100cm so measured reading is less than actual reading .metallic mercury and not its oxidedoes the roasting of cinnabar (Hgs), produce2^m+3×3^2m-n×5^m+n+3×6^n+1/(6^m+1×10^n+3×15^m

Answer 2

Answer:

Lowest pka

→ Highest ka

→ High acididty.

As R increases → Acidity decreases.

Where, R is length of alkyl chain.

So, HCOOH is more acidic and least value of pk

a