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प्रश्न
The pH values of three solutions A, B and C are given in the table. Answer the folloiwng questions:
| Solution | pH value |
| A | 12 |
| B | 2 |
| C | 7 |
Which solution will liberate CO2 when reacted with sodium carbonate?
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उत्तर
Solution B with acidic pH liberates CO2 with sodium carbonate.
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संबंधित प्रश्न
The property by which certain hydrated salts, when left exposed to the atmosphere, lose their water of crystallization and crumble into powder.
The salt whose aqueous solution will have no effect on either red litmus or blue litmus is
(a) potassium sulphate
(b) sodium carbonate
(c) ammonium sulphate
(d) sodium acetate
Give one example of a salt which gives an aqueous solution having:
pH more than 7
The pH values of three solutions A, B and C are given in the table. Answer the folloiwng questions:
| Solution | pH value |
| A | 12 |
| B | 2 |
| C | 7 |
Which solution will have no effect on litmus solution?
Fill in the blank
___________ is the phenomenon by which hydrated salts on exposure to dry air, lose their water of crystallization and crumble to powder.
Outline the steps required to convert hydrogen chloride to anhydrous iron (III) chloride. Write the equations for the reactions.
Distinguish by a chemical test sodium chloride and sodium sulphide.
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.
What are hygroscopic substances?
Name the salt formed when sulphuric acid is added to sodium hydroxide and write its pH.
