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प्रश्न
On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.
A white solid which evolves two colourless gases which on cooling combine and condense on the cooler parts of the test tube.
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उत्तर
Ammonium chloride [NH4Cl].
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संबंधित प्रश्न
The chemical name of baking soda is ______.
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Reduction reaction is the exact opposite of
- displacement reaction
- decomposition reaction
- oxidation reaction
- none of these
What are chemical reactions?
Name three reducing agents ?
Balance the following equation :
Fe + H2O → Fe3O4 + H2
Explain the following reaction with one suitable example of Double decomposition reaction.
State the original colour of the following substance and colour of residue obtained after heating.
Zinc carbonate
When lithium metal is placed in hydrochloric acid, _______ gas is evolved.
Magnesium + oxygen → magnesium oxide.
2Mg + O2 → 2Mg O
Match the following:
| Column I | Column II | ||
| 1. | Burning of coal | a. | Rusting |
| 2. | Painting of a surface | b. | Evaporation |
| 3. | Dipping iron in the water | c. | Chemical change |
| 4. | Salt from seawater | d. | Prevention of rusting |
