Match List - I with List - II.
| List - I | List - II | ||
|---|---|---|---|
| Metals/Non-metals (Compounds) | (Applications) | ||
| (A) | \(\mathrm{FeSO_4.4H_2O}\) | (I) | Lime and tooth paste |
| (B) | Iodine \((\mathrm{I_2})\) | (II) | Cement Industry |
| (C) | \(\mathrm{CaSO_4.2H_2O}\) | (III) | Antiseptic |
| (D) | \(\mathrm{CaCO_3}\) | (IV) | Dye Industry |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → (A)-(IV), (B)-(III), (C)-(II), (D)-(I)
Each compound is matched with the industry or use it is best known for.
(A) \(\mathrm{FeSO_4.4H_2O}\) — this matches (IV) Dye Industry. Hydrated ferrous sulphate (green vitriol) is used as a mordant in dyeing, to fix dyes on cloth, and in making inks.
(B) Iodine \((\mathrm{I_2})\) — this matches (III) Antiseptic. A solution of iodine in alcohol (tincture of iodine) is applied on wounds to kill germs.
(C) \(\mathrm{CaSO_4.2H_2O}\) — this matches (II) Cement Industry. This is gypsum, which is added to cement to slow down its setting.
(D) \(\mathrm{CaCO_3}\) — this matches (I) Lime and tooth paste. Calcium carbonate (limestone) is heated to make quicklime, and in fine powder it is the mild abrasive in tooth paste.