Question

1. Evolution of gas occurs in all chemical reactions.
2. The reaction in which heat is evolved is called endothermic reaction.
3. Dissolution of ammonium chloride in water is exothermic reaction.
4. Reduction reaction refers to hydrogen removal.
heat
5. The reaction, 2KCIO,(s)
2KCl(s) + 302(g), is a displacement reaction.
Encircle the odd-one from the lists given below.
1. Sodium chloride, Sodium hydroxide, Sulphuric acid, Acetic acid.
2. (i)
C +0.
CO
D. Write T for true and F for false statement​

Answer 1

1.A gas evolution reaction is a chemiceal reaction in which one of the end products is a gas such as oxygen or carbon dioxide. Gas evolution reactions may be carried out in a fume chamber when the gases produced are poisonous when inhaled or explosive

2.Endothermic reactions are chemical reactions in which the reactants absorb heat energy from the surroundings to form products. ... Physical processes can be endothermic as well – Ice cubes absorb heat energy from their surroundings and melt to form liquid water (no chemical bonds are broken or formed).

sorry....i dont know