Match List-I with List-II
| List-I | List-II | ||
|---|---|---|---|
| (A) | Heavy water | (I) | CaO |
| (B) | Quicklime | (II) | NH3 |
| (C) | Baking soda | (III) | D2O |
| (D) | Ammonia | (IV) | NaHCO3 |
Choose the most appropriate answer.
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → A-III, B-I, C-IV, D-II
Each common name is matched with the chemical formula of the substance.
(A) Heavy water — this matches (III) D2O. It is water in which hydrogen is replaced by deuterium (heavy hydrogen); it is used as a moderator in nuclear reactors.
(B) Quicklime — this matches (I) CaO. It is calcium oxide, made by heating limestone; with water it gives slaked lime.
(C) Baking soda — this matches (IV) NaHCO3. It is sodium hydrogen carbonate, which gives off carbon dioxide on heating and makes cakes rise.
(D) Ammonia — this matches (II) NH3. It is a compound of nitrogen and hydrogen, made by the Haber process.