Question

Assertion (A) : Silver salts are used in black and white photography.

Reason (R) : Silver salts do not decompose in the presence of light.

(A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).

(B) Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).

(C) Assertion (A) is true, but Reason (R) is false.

(D) Assertion (A) is false, but Reason (R) is true.

Answer 1

Correct answer is (C) Assertion (A) is true, but Reason (R) is false.

Silver salt (AgCl) are used in black and white photography. silver salt (AgCl) is photo sensitive compound, it decomposes into elemental chlorine (Cl₂) and Ag(metal).

AgBr is also used as black and white photography.

2AgCl \(\overset{h\lambda}{\longrightarrow}\) 2Ag + Cl₂