Question

define combination reaction Redox reaction and double displacement reaction​

Answer 1

Explanation:

Combination reaction : when two or more substance combined to form a single product are called combination reaction

redox reaction :If one substance gain oxygen and other reduced are called redox reaction

Double displacement reaction: Such reaction in which there is an exchange of ions in the reactant are called double displacement reaction

hope its help u dear mate....

Answer 2

In combination reactions, two or more substances combine to form a new compound. Only one product is obtained in such reactions. The reactants in such reactions can be elements as well as compounds.

For Example, Calcium oxide reacts with water to produce calcium hydroxide.

2. 2H2+O2->2H2O

Redox: The reactions in which both OXIDATION and REDUCTION takes place is called Redox reaction.

'--------------------;Loss of 2e-

2Na(s)+ Cl2 (g)--> 2Na+Cl-

,-------------------;Gain of 2e-

Displacement reaction is a chemical reaction in which a more reactive element displaces a less reactive element from its compound. Both metals and non-metals take part in displacement reactions.

Example : Reaction of iron nails with copper sulphate solution.