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प्रश्न
What do you observe? When
Lead nitrate is heated.
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उत्तर
Lead nitrate decomposes on heating, leaving a yellow residue of lead monoxide, and brown nitrogen dioxide and colourless oxygen gases are evolved.
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संबंधित प्रश्न
Define exothermic reactions. Give two examples of each.
Define endothermic reactions. Give two examples of each.
State the effect of an exothermic reaction on the surroundings.
FILL IN THE BLANK
In a................ reaction heat energy is absorbed.
State which type of chemical reaction proceeds with evolution of heat energy.
State which type of chemical reaction proceeds with the absorption of heat energy.
Supply of energy may be required to initiate a reaction. State the different forms with a suitable example of reactions initiated by the supply of energy.
Select the correct answer from the options given below:
State the gaseous product formed, when
Two gases one of them neutral combines by absorption of light energy.
True or False. If false, give the correct answer.
Tarnishing of silver is an example of endothermic change.
Give a scientific reason.
While preparing dilute sulphuric acid from concentrated sulphuric acid in the laboratory, the concentrated sulphuric acid is added slowly to water with constant stirring.
