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प्रश्न
Melting of wax is a change where a solid changes to liquid state. Give one more such change which you observe in your surroundings
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उत्तर
Melting of ice, melting of butter
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संबंधित प्रश्न
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The new substances formed during a chemical reaction are called the ..................
TRUE \ FALSE
The evolution of a gas during a chemical reaction is shown by an arrow pointing downwards. True or false ?
Write true or false :
No new substance is formed during a chemical reaction.
Explain the following reaction with one suitable example of Combination reactions .
Explain the following reaction with one suitable example of Decomposition reaction
Give a word equation for the following reaction.
A compound which on heating shows – colour change from brown to yellow.
Complete the table given below.
| Addition of dil. H2SO4 to KHCO3 | Name of residue obtained |
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.
Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.
Lead nitrate.
