Question

What do you mean bv endothermic and exothermic reactions? Give examples.
ང
What happens when potassium iodide solution is added to lead nitrate
solution? Give equation of reaction and mention the type of reaction involved?
How can we make a chemical equation more informative?
Write one chemical equation to show:
Combination reaction
Decomposition reaction
Double Displacement Reaction
Write shon potes on:
Corrosion
b. Rancidity
29.
A substance X when mixed with water is used for white washing. The
substance X is also formed when a substance Y decomposes.
2.
Identifv X and Y and write their formula.
30.
Define oxidation and reduction Give an example of a Redox reaction.
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Answer 1

endothermic means in which the heat is not evolved and in endothermic heat is exposed or evolved out