Question

Match List-I with List-II.

List-I (Name of the test)	List-II (Reaction sequence involved) [M is metal]
(A) Borax bead test	I
(B) Charcoal cavity test	II
(C) Cobalt nitrate test	III
(D) Flame test	IV

Choose the correct answer from the options given below:

• A. A-III, B-I, C-IV, D-II
• B. A-III, B-II, C-IV, D-I
• C. A-III, B-I, C-II, D-IV
• D. A-III, B-IV, C-I, D-II

Answer 1

The Correct Option is D

To address the question, each test from List-I must be accurately aligned with its corresponding reaction sequence from List-II.

1. Borax Bead Test:
   This test identifies specific metals. The associated equation is:This sequence utilizes Na₂B₄O₇ in the reaction. Therefore, (A) Borax bead test corresponds to III.
2. Charcoal Cavity Test:
   This test identifies metal salts that yield a distinctive residue in the cavity upon reduction. The relevant equation is:This involves reactions occurring on charcoal, thus, (B) Charcoal cavity test corresponds to IV.
3. Cobalt Nitrate Test:
   This test detects compounds yielding cobalt or its oxides. The pertinent equation is:The sequence incorporates cobalt nitrate, hence, (C) Cobalt nitrate test corresponds to I.
4. Flame Test:
   This test determines the presence of certain metal ions by observing the flame's color. The reaction is:This involves the combustion of the sample, so, (D) Flame test corresponds to II.

The correct pairings are therefore: A-III, B-IV, C-I, D-II.