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प्रश्न
Complete the table given below.
| Heat on copper carbonate | Test for gas evolved |
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उत्तर
| Heat on copper carbonate | Test for gas evolved | Colourless (CO2 Carbon dioxide) |
APPEARS IN
संबंधित प्रश्न
How do the following help in bringing about a chemical change?
pressure.
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Miscible liquids having slightly different boiling points can be separated by the
- evaporation
- distillation
- fractional distillation
- sedimentation
Write true or false :
When iron and sulphur are heated together a grey mass is formed which is attracted by a magnet .
Give an example of the following chemical changes.
A reaction involving
(i) Change of state
(ii) formation of precipitate
State the original colour of the following substance and colour of residue obtained after heating.
Copper carbonate
Select the correct answer for the following options:
The pale blue precipitated obtained when copper [II] sulphate reacts with sodium hydroxide.
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].
Silver metal can displace hydrogen gas from nitric acid.
Burning of paper is the best example of ______ change.
A student took a solution of copper sulphate in a beaker and put a clean iron nail into it and left it for about an hour.
What changes do you expect?
