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प्रश्न
Name the raw material used for the production of caustic soda.
उत्तर
Common salt (or sodium chloride) is the raw material for making caustic soda. The chemical formula of sodium chloride is NaCl.
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संबंधित प्रश्न
Identify the substance underlined, in the following case
A solid formed by reaction of two gases, one of which is acidic and the other basic in nature
From the list of the following salts choose the salt that most appropriately fits the
description is given in the following:
[AgCl, MgCl2, NaHSO4, PbCO3, ZnCO3, KNO3, Ca(NO3)2]
On heating, this salt gives a yellow residue when hot and white when cold
Write a balanced chemical equation for Action of dilute hydrochloric acid on magnesium sulphite.
How is common salt obtained from sea-water?
Give one example of a salt which gives an aqueous solution having:
pH less than 7
Name a salts whose solubility increases with temperature.
Name two carbonates do not produce carbon dioxide on heating.
Copy and complete the following table which refers to the action of heat on the carbonate:
| Carbonate | Colour of residue on cooling |
| Zinc Carbonate |
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 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.
Salt which is formed by the partial replacement of hydrogen ions of an acid by a metal is called ______.
