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प्रश्न
Distinguish by heating the following in dry test tubs.
Ammonium Chloride and iodine.
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उत्तर
| Ammonium Chloride | Iodine | |
| Residue left | No residue | No residue |
| Colour of residue | The colour of the residue is white sublimate. | The colour of the residue is Violet sublimate. |
| Gas produced | Hydrogen chloride and ammonia gas are produced.(HCl + NH3) | Iodine vapours are produced. |
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संबंधित प्रश्न
Fill in the blank
A change in which the substance can be brought back to its original state is called a _______ change.
Give reason for the following:
Blue solution of copper sulphate changes to green when a piece of iron is added to this solution.
State the following reaction represent oxidation or reduction.
\[\ce{H->H+}\]
State whether the following reaction is oxidation or reduction.
\[\ce{Na->Na+}\]
Select the correct answer from the options given below:
State the gaseous product formed, when
An ammonium salt reacts with an alkali.
Match the following:
| 1. | Sodium Chloride | a. | CaSO41/2H2O |
| 2. | Calcium sulphate dihydrate | b. | C2H5Oh |
| 3. | Magnesium sulphate hydrate | c. | CaSO4.2H2O |
| 4. | Calcium sulphate hemihydrate | d. | NaCl |
| 5. | Phenol | e. | MgSO4.H2O |
Arrange the following statements in correct sequence:
- One side is water-loving and other water-hating molecules.
- When you agitate the cloth, the dirt is surrounded by many molecules and taken away from the cloth.
- The dirt surrounded by the detergent molecules floats in the water making it dirty.
- Finally, the cloth is clean.
- The detergent molecules have two sides.
- Water hating goes and joins with dirt and oil in the cloth while the water-loving joins with the water molecules.
Is the conversion of milk into ice cream a chemical change?
______ is the chemical name of slaked lime.
Define the following term:
Chemical change
