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प्रश्न
Distinguish by a chemical test sodium carbonate and sodium sulphite.
Give a chemical test to distinguish between:
Sodium carbonate and sodium sulphite.
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उत्तर
Sodium chloride reacts with H2SO4 to produce HCl gas, while sodium sulphite reacts with H2SO4 to produce sulphur dioxide gas.
\[\ce{Na2CO3 + H2SO4 -> Na2SO4 + H2O + CO2}\]
Sodium sulphite when added to a dilute solution. Sulphuric acid releases a colourless gas with a burning sulphur odour and changes acidified potassium dichromate paper from orange to green.
\[\ce{Na2SO3 + H2SO4 -> Na2SO4 + H2O + SO2}\]
\[\ce{\underset{(Orange)}{K2Cr2O7} + 3SO2 + H2SO4 -> K2SO4 + \underset{(Green)}{Cr2(SO4)3} + H2O}\]
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संबंधित प्रश्न
Write a balanced chemical equation for the following:
Action of dilute hydrochloric acid on magnesium sulphite.
Complete and balance the following chemical equation:
\[\ce{NaCl + NH3 + H2O + CO2 ->}\]
What is meant by ‘hydrated’ salts? Explain with examples.
Give one example of a salt which gives an aqueous solution having:
pH equal to 7
What is a ‘salt’?
Hard water required for an experiment is not available in a school laboratory. However, following salts are available in the laboratory. Select the salts which may be dissolved in water to make it hard for the experiment.
|
(1) |
Calcium Sulphate |
(2) |
Sodium Sulphate |
|
(3) |
Calcium Chloride |
(4) |
Potassium Sulphate |
|
(5) |
Sodium Hydrogen Carbonate |
(6) |
Magnesium Chloride |
(A) 1, 2 and 4
(B) 1, 3 and 6
(C) 3, 5 and 6
(D) 2, 4 and 5
Differentiate hydrate and anhydrous salts with examples.
Write any five uses of salts.
The acid reacts with a base to form a neutral product called ______.
Name the salt formed when sulphuric acid is added to sodium hydroxide and write its pH.
