NEETChemistryPractical Chemistry
Match List-I with List-II concerning the preliminary tests of anions using dilute H ₂ SO ₄ . List-I (Anion) List-II (Observation) (A) Carbonate ( CO ₃²⁻ ) (I) Reddish-brown gas (B) Sulphide ( S ²⁻ ) (II) Suffocating smell of burning sulphur (C) Sulphite ( SO ₃²⁻ ) (III) Brisk effervescence (D) Nitrite ( NO ₂⁻ ) (IV) Rotten egg smell Choose the correct answer from the options given below:
Options
- A(A)-(III), (B)-(II), (C)-(IV), (D)-(I)
- B(A)-(III), (B)-(IV), (C)-(II), (D)-(I)
- C(A)-(I), (B)-(IV), (C)-(II), (D)-(III)
- D(A)-(IV), (B)-(III), (C)-(I), (D)-(II)
Correct answer
B. (A)-(III), (B)-(IV), (C)-(II), (D)-(I)
Step-by-step solution
When treated with dilute H ₂ SO ₄ : Carbonate ( CO ₃²⁻ ) gives CO ₂ gas which produces brisk effervescence. Sulphide ( S ²⁻ ) gives H ₂ S gas which has a characteristic rotten egg smell. Sulphite ( SO ₃²⁻ ) gives SO ₂ gas which has a suffocating smell of burning sulphur. Nitrite ( NO ₂⁻ ) gives NO ₂ gas which is a reddish-brown gas. Therefore, the correct match is (A)-(III), (B)-(IV), (C)-(II), (D)-(I). Answer: (A)-(III), (B)-(IV), (C)-(II), (D)-(I)