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प्रश्न
Write a balanced equation for the preparation of the following salt:
Zinc carbonate from zinc sulphate.
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उत्तर
\[\ce{ZnSO4 + (NH4)2CO3 -> (NH4)2SO4 + ZnCO3}\]
संबंधित प्रश्न
State one relevant observation for the following:
Anhydrous calcium chloride is exposed to air for some time.
Which of the following salt has a blue colour and why?
CuSO4.5H2O or CuSO4
Name three chemicals made from common salt (or sodium chloride).
Complete and balance the following chemical equation:
\[\ce{NaCl + NH3 + H2O + CO2 ->}\]
Write the names, formulae and colours of any two hydrated salts.
A salt is dissolved in water and the pH of this salt solution is measured with a universal indicator paper. If the pH of solution is less than 7, the salt is most likely to be ______.
Define the following term:
Efflorescence
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.
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?
