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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
State whether the following statement is true or false. In case a statement is false, write the corrected statement.
Iron and rust are the same substances.
State the conditions necessary for a chemical change or reaction.
Write the chemical reaction where the following changes are observed.
Gas is evolved
Give reason for the following:
Silver nitrate solution is kept in coloured bottles.
Give reason for the following:
Molybdenum is used in the manufacture of ammonia.
What do you understand by 'chemical reaction'?
What do you observe when Cobalt chloride paper is introduced in water vapour.
Give balanced equation for the following conversion affected by heat alone on the substance:
Copper carbonate to copper oxide
Explain with the help of balanced equations, how precipitation reactions are used for identifying the positive radicals in three different salts, each having a different cation [positive ion].
Assertion (A): Cutting paper into very small pieces is an irreversible change.
Reason (R): Physical changes are always reversible.
