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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]
On heating, this salt gives a yellow residue when hot and white when cold
Write a balanced equation for the preparation of the following salts:
Zinc carbonate from Zinc sulphate
Name the raw material used for the production of caustic soda.
What happens when a concentrated solution of sodium chloride (brine) is electrolysed? Write the equation of the reaction involved.
What will be the colour of litmus in an aqueous solution of ammonium chloride salt?
Which of the following salts will give an aqueous solution having pH of almost 7?
(a) NH4NO3
(b) NH4Cl
(c) CaCl2
(d) KCl
Give one example of a salt which gives an aqueous solution having:
pH equal to 7
Consider the following salts:
Na2CO3, NaCl, NH4Cl, CH3COONa, K2SO4, (NH4)2SO4
Which of salts will give:
acidic solutions?
Explain ‘salt hydrolysis’
name two salts which are acidic.
name two salts which are neutral, when dissolved in water.
State one observation for each of the following :
Lead nitric is heated strongly in a test tube.
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.
Write any five uses of salts.
The acid reacts with a base to form a neutral product called ______.
What are hygroscopic substances?
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:
Sodium zincate
Select the correct answer from A, B, C, D and E.
A compound which in the aqueous solution state, is neutral in nature.
