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प्रश्न
Complete and balance the following chemical equation:
\[\ce{NaCl + NH3 + H2O + CO2 ->}\]
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उत्तर
\[\ce{NaCl + NH3 + H2O + CO2 -> NaHCO3 + NH4Cl}\]
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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
The salt prepared by the method of direct combination is _______.
Give any two uses of common salt (sodium chloride).
What name is given to the common salt which is mined from underground deposits? How was this salt formed?
What happens when a few drops of water are added to anhydrous copper sulphate? Explain with the help of an equation.
The number of molecules of water of crystallisation present in washing soda crystals is ______.
Write the name and formula of one salt which contains:
Two molecules of water of crystallisation.
Name a salts whose solubility increases with temperature.
name two salts which are acidic.
Name two salts which are neutral when dissolved in water.
You are asked to prepare hard water in your laboratory. Select a group from the following groups of salts, any salt of which you may dissolve in distilled water to obtain hard water.
(A) NaCl; Na2SO4; KCl
(B) NaCl; CaCl2; KCl
(C) CaCl2; CaSO4; MgSO4
(D) Na2SO4; CaSO4; MgSO4
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
State one observation for each of the following :
Lead nitric is heated strongly in a test tube.
The pH values of three solutions A, B and C are given in the table. Answer the following questions:
| Solution | pH value |
| A | 12 |
| B | 2 |
| C | 7 |
- Which solution will have no effect on litmus solution?
- Which solution will liberate CO2 when reacted with sodium carbonate?
- Which solution will turn red litmus solution blue?
Taking sodium carbonate as an example, give the meaning of the following terms:
Water of crystallization
State what would you observe when :
Washing soda crystals are exposed to the atmosphere.
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.
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.
Many salts absorb water from the atmosphere. This property is called:
