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प्रश्न
Name: A greenish-yellow gas.
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उत्तर
Chlorine
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संबंधित प्रश्न
Define electrolysis.
What is the reaction called when oxidation and reduction take place simultaneously? Explain with one example.
Give an example of the following chemical change.
A reaction where colour change is noticed
What is a chemical change? Give two examples of chemical change?
State the main characteristics of chemical reactions. Give at least one example in each case.
Name: Gas with rotten egg smell.
State the original colour of the following substance and colour of residue obtained after heating.
Ammonium dichromate
Give balanced equation for the following conversion affected by heat alone on the substance:
Copper carbonate to copper oxide
Complete the table given below.
| Heat on copper carbonate | Test for gas evolved |
Which of the following are chemical changes?
(i) Decaying of wood
(ii) Burning of wood
(iii) Sawing of wood
(iv) Hammering of a nail into a piece of wood
