Advertisements
Advertisements
Question
Salts A, B, C, D and E undergo reactions (i) to (v) respectively. Identify the anion present in these salts on the basis of these reactions.
- When silver nitrate solution is added to a solution of A, a white precipitate, insoluble in dilute nitric acid, is formed.
- The addition of dilute hydrochloric acid to B produces a gas which turns lead acetate black on paper.
- When a freshly prepared solution of ferrous sulphate is added to a solution of C and concentrated sulphuric acid is gently poured from the side of the test tube, a brown ring is formed.
- When dilute sulphuric acid is added to D, a gas is produced which turns acidified potassium dichromate solution from orange to green.
- The addition of dilute hydrochloric acid to E produces effervescence. The gas produced turns lime water milky but does not affect acidified potassium dichromate solution.
Advertisements
Solution
| Salt | Anion |
| A | Chloride (Cl−) |
| B | Sulphide (S2−) |
| C | Nitrate \[\ce{(NO^-3)}\] |
| D | Sulphite \[\ce{(SO^{2−}3)}\] |
| E | Carbonate \[\ce{(CO^{2-}3)}\] |
RELATED QUESTIONS
State what would you observe when Washing Soda Crystals are exposed to the atmosphere
Write a balanced chemical equation for Action of dilute hydrochloric acid on magnesium sulphite.
Which of the following salt has a blue colour and why?
CuSO4.5H2O or CuSO4
Give the names and formulae of any two salts. Also name the acids and bases from which these salt may be obtained.
Which of the following salts will give an aqueous solution having pH of almost 7?
(a) NH4NO3
(b) NH4Cl
(c) CaCl2
(d) KCl
Define the following term:
Water of crystallization
Answer the questions below relating your answers only to salts in the following list: Sodium chloride, anhydrous calcium chloride, copper sulphate-5-water?
- What name is given to the water in the compound copper sulphate-5-water?
- If copper sulphate-5-water is heated, anhydrous coppersulphate is formed. What is its colour?
- By what means, other than healing, could you dehydrate copper sulphate-5-water and obtain anhydrous coppersulphate?
- Which one of the salts in the given list is deliquescent?
Copy and complete the following table which refers to the action of heat on some carbonates:
| Carbonate | Colour of residue on cooling |
| Zinc Carbonate | |
| Lead carbonate | |
| Copper carbonate |
Distinguish by a chemical test sodium hydroxide solution and ammonium hydroxide solution.
How is normal salt obtained? Give a suitable reaction.
