Match the following List-1 Acid List-2 Ka(ionization constant) A) HCN I) 6.8×10-4 B) H2C2O4 II) 8.9×10-8 C) H2S III) 4.9×10-10 D) Niacin IV) 5.6×10-2 V) 1.5×10-5 The correct match is

TS EAMCET · Chemistry · Ionic Equilibrium

Match the following

List-1
Acid List-2
Ka(ionization constant)

A) $HCN$ I) $6.8 \times 10^{- 4}$

B) $H_{2} C_{2} O_{4}$ II) $8.9 \times 10^{- 8}$

C) $H_{2} S$ III) $4.9 \times 10^{- 10}$

D) Niacin IV) $5.6 \times 10^{- 2}$

V) $1.5 \times 10^{- 5}$

The correct match is

A

A B C D

I II IV V
B

A B C D

V II III IV
C

A B C D

II III IV V
D

A B C D

III IV II V

Verified Solution

Answer & Solution

Correct Answer

(D)

A	B	C	D
III	IV	II	V

Step-by-step Solution

Detailed explanation

The acidity is directly proportional to the acid dissociation constant. The inorganic acid are more acidic than the organic acids. Niacin is stronger acid than the hydrocyanic acid because niacin conjugate base is more stable. The acid dissociation constant of HCN is…

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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List-1 Acid		List-2 Ka(ionization constant)
A)	$HCN$	I)	$6.8 \times 10^{- 4}$
B)	$H_{2} C_{2} O_{4}$	II)	$8.9 \times 10^{- 8}$
C)	$H_{2} S$	III)	$4.9 \times 10^{- 10}$
D)	Niacin	IV)	$5.6 \times 10^{- 2}$
		V)	$1.5 \times 10^{- 5}$