Advertisements
Advertisements
प्रश्न
Give a balanced equation for a reaction involving the evolution of gas on the addition of dilute acid to sodium sulphite.
Advertisements
उत्तर
Sodium sulphite when reacting with dil. `"H"_2"SO"_4` evolves gas `"SO"_2`.
\[\ce{Na2SO3 + H2SO4 [dil.]->Na2SO4 + H2O + SO2 (g)}\]
APPEARS IN
संबंधित प्रश्न
Complete and balance the following chemical equations:
Ba`"CI"_2` + `"H"_2"SO"_4` `→`
(aq.) (aq.)
Give a chemical test to distinguish between the following gases.
H2 and O2
Give a chemical test to distinguish between the following gases.
HCl and H2S
Complete the table given below.
| Heat on copper carbonate | Test for gas evolved |
State the following reaction represent oxidation or reduction.
\[\ce{Cu++->Cu}\]
Give two examples where a chemical reaction is accompanied by a change in colour of the reactants and products on completion of the reaction.
Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.
Calcium hydroxide.
State whether the following statement is true or false:
When a candle burns, both physical and chemical changes take place.
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.
We are advised to not to play with fireworks. Give reason.
