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प्रश्न
Give a chemical test to distinguish between the following gases.
H2 and CO2
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उत्तर
| Hydrogen | Carbon dioxide |
| Litmus test: Neutral | Litmus test: Moist blue litmus faint red |
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संबंधित प्रश्न
Complete and balance the following chemical equations
NaCI + `AgNO_3` `→`
Complete and balance the following chemical equations:
Ba`"CI"_2` + `"H"_2"SO"_4` `→`
(aq.) (aq.)
Select the correct answer for the following options:
The black residue obtained on heating copper carbonate.
Select the correct answer for the following options:
The pale blue precipitated obtained when copper [II] sulphate reacts with sodium hydroxide.
Complete the table given below.
| Heat on iodine crystals | Colour of vapours evolved |
State the following reaction represent oxidation or reduction.
\[\ce{H->H+}\]
What is the role of a catalyst in a chemical reaction?
Silver metal can displace hydrogen gas from nitric acid.
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.
Photosynthesis is a chemical charge. Justify your answer.
