Question

4. The pale blue precis
5. The gas which reacts with oxygen to give a neutral liquid.
Q.2 Give a word equation for each of the following reactions.
1. Two solids which combine on heating, to give a liquid.
2. Two gases which combine to give a solid.
3. A compound which on heating shows - colour change from brown to yellow,
4. A salt which reacts with ammonium hydroxide to give a reddish brown precipit
5. An exothermic reaction where both the reactants are gases, one of which is oxy
Q.3 Name the following:
1. The silvery residue obtained on heating mercury [II] oxide.
2. The gas evolved when a dilute acid is added to chalk ſlimestone)
3. Two non-metals which react explosively when brought in close contact.
4. Two gases which react under pressure in presence of a catalyst at elevated
temperatures to give a gaseous product.
5. A catalyst which increases the rate of a chemical reaction.
Q.4 Give reasons for the following:
1. Even though rusting is an exothermic reaction, the heat evolved when an in
rusts is unnoticeable.
2. Electrolytic decomposition of water is a reaction involving change of state.​

Answer 1

Answer:

what the questions bro