Question

give answers of these questions​

Answer 1

Answer:

Q1]When two or more reactant combine together to form single product is called combination reaction.

E.g.:-

a)C+O2=CO2 b) Mg+O2=MgO2

Q2]Mg + O2 =====>MgO + O[released]

Q3] A chemical reaction in which heat is given out is known as exothermic reaction.

Q4] A reaction is "completed" when it has reached equilibrium — that is, when concentrations of the reactants and products are no longer changing. If the equilibrium constant is quite large, then the answer reduces to a simpler form: the reaction is completed when the concentration of a reactant falls to zero.

Q5] a) Decomposition reaction.

b)A decomposition reaction is a type of chemical reaction in which a single compound breaks down into two or more elements or new compounds. Or A decomposition reaction is a reaction in which we get two products from a single reactant.

c)H2O======>H2 + O

Q6] a)A thermal decomposition reaction can be defined as a decomposition reaction which is activated by thermal energy. The reaction is generally endothermic as energy is required to break chemical bond in order to separate the constituent elements.

b)Yes, Hydrogen peroxide (H2O2)

c)Silver chloride is stored in dark coloured bottles because it reacts with sunlight and decomposes to form silver and chlorine gas. So to prevent this it is stored in dark coloured bottles. the type of reaction is photolytic decomposition reaction.

hope it's helpful