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प्रश्न
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 |
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उत्तर
| Carbonate | Colour of residue on cooling |
| Zinc Carbonate | Yellow when hot, white on cooling |
| Lead carbonate | Yellow on cooling |
| Copper carbonate | Light green amorphous powder changes to black on cooling. |
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संबंधित प्रश्न
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]
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CuSO4.5H2O or CuSO4
Name the salt which is used as preservative in pickles, and in curing meat and fish.
How would you show that blue copper sulphate crystals contain water of crystallisation?
What happens when a few drops of water are added to anhydrous copper sulphate? Explain with the help of an equation.
What is meant by 'a family of salts'? Explain with examples.
What is meant by 'hydrated' and 'anhydrous' salts? Explain with examples.
The aqueous solution of one of the following salts will turn red litmus to blue. This salt is:
(a) potassium sulphate
(b) sodium sulphate
(c) sodium chloride
(d) potassium carbonate
P and Q are aqueous solutions of sodium chloride and sodium hydroxide, respectively. Which of these will turn:
red litmus blue?
Name a salt whose solubility decreases with temperature.
name two salts which are basic.
State one observation for each of the following :
Lead nitric is heated strongly in a test tube.
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.
State what would you observe when :
The salt ferric chloride is exposed to the atmosphere.
Name a colourless gas which bleaches.
Name the anion present in the following compound:
Compound A, when warmed with concentrated sulphuric acid, gives a gas which fumes in moist air and which gives dense white fumes with ammonia.
Differentiate hydrate and anhydrous salts with examples.
Many salts absorb water from the atmosphere. This property is called:
Salt is ______ in nature.
You are provided with the list of chemicals mentioned below in the box:
| Sodium hydroxide solution, copper carbonate, zinc, hydrochloric acid, copper, dilute sulphuric acid, chlorine, iron |
Using suitable chemicals from the list given, write a balanced chemical equation for the preparation of the salt mentioned below:
Copper sulphate
