InterviewSolution
Saved Bookmarks
| 1. |
Read the following and answer any four questions from 2(i) to 2(v). A compound, X of sodium forms a white powder. It is a constituent of baking powder and is used in some antacids. When heated it gives a compound, Y which is anhydrous and absorbs water to become a hydrated salt. When this salt is kept in open air, it loses water molecules in a process called efflorescence. When dissolved in water it forms a strong base and a weak acid, Z.(i) What is the compound, X?(a) NaHCO (b) Na₂CO(c) NOH (d) NaCl(ii) The compound, Y is(a) NaHCO,(b) Na₂CO,(c) Na₂CO, 10H₂0(d) NaCl(iii) What is the nature of the solution formed by dissolving Y in water?(a) Alkaline(b) Acidic(c) Neutral(d) It remains insoluble.(iv) Identify the compound, Z.(a) CO₂(b) H₂CO,(C) NaOH(d) H₂O(v) Sodium carbonate is a basic compound because it is a salt of a(a) strong acid and strong base(b) weak acid and weak base(c) strong acid and weak base(d) weak acid and strong base. |
|
Answer» Compound X is Sodium Hydrogen Carbonate (NAHCO)(ii) (b) Compound Y is Anhydrous Sodium CARBONITE Na2CO (iii) (a) Alkaline(iv) (b) Compound Z is Carbonic Acid H2CO.(V) (d) weak acid and STRONG base. |
|