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प्रश्न
Complete the table given below.
| Addition of dil. H2SO4 to FeS | Odour of gas evolved |
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उत्तर
| Addition of dil. H2SO4 to FeS | Odour of gas evolved | Rotten eggs (H2S Hydrogen sulphide) |
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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 pipes coated with zinc do not get rusted easily.
Changes in which new substances are formed are called ______ changes.
Fill in the blanK
A .............is a substance which changes the rate of a chemical reaction without undergoing a chemical change.
Write true or false.
A chemical equation gives only qualitative information of a chemical reaction.
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].
A reaction between an acid and a base is called ______.
Rusting of Iron: undesirable change:: Dead plants turn into manure: ______.
Classify the following processes into physical or chemical changes:
- Beating of aluminium metal to make aluminium foil.
- Digestion of food.
- Cutting of a log of wood into pieces.
- Burning of crackers.
______ occurs in the absence of air and in the presence of micro-organisms such as yeast.
Define the following term:
Chemical change
