2024 · Q19
Match List I with List II and select the correct answer using the code given below the Lists:
List I (Pigment in paint):
- ANatural pigment,
- BSynthetic pigment,
- CReactive pigment,
- DInert pigment
List II (Example):
- 1Chalk,
- 2White lead,
- 3Red lead,
- 4Titanium dioxide
general-sciencechemistry
- AA-1, B-2, C-3, D-4
- BA-1, B-3, C-2, D-4
- CA-4, B-3, C-2, D-1
- DA-4, B-2, C-3, D-1
Explanation
Chalk (calcium carbonate) is a naturally occurring mineral used as a natural pigment, so A matches 1. White lead (basic lead carbonate) is manufactured by the corrosion of metallic lead, making it a synthetic pigment, so B matches 2. Red lead (lead tetroxide) is a reactive anti-corrosive primer pigment used on steel, so C matches 3. Titanium dioxide is chemically very stable and is used as an inert white pigment and extender, so D matches 4. The correct code is therefore A-1, B-2, C-3, D-4.