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प्रश्न
Write the chemical reaction where the following changes are observed.
Gas is evolved
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उत्तर
\[\ce{Zn + H2SO4 -> ZnSO4 + H2}\]
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संबंधित प्रश्न
Complete and balance the following chemical equations
NaCI + `AgNO_3` `→`
Give reason .
A person suffering from acidity is advised to take an antacid.
Explain,giving one example of the following chemical changes:
Reversible reaction
Give a chemical test to distinguish between the following gases.
NH3 and SO2
A chemical reaction is often accompanied by external indications or characteristics which include –
- Colour change
- Effervescence or gas evolved
- Evolution or absorption of heat
- Formation of a precipitate.
With reference to each of the above indications, state the external indication seen during – Addition of dilute acid to an active metal.
Select the correct answer from the options given below:
State the gaseous product formed, when
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Give an example of a chemical reaction for the following situation:
A change in colour is observed
If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
Can you change rust back into iron by some simple method?
Why is spoiling food a chemical change?
When milk is mixed with coffee decoction, the colour of milk and decoction changes due to ______.
