Question

1) What is combination reaction? 2) what is decomposition reaction? 3) what is displacement reaction? 4) what is double displacement reaction?

I want this all 4 answers ​

Answer 1

Answer:

combination reaction (also known as a synthesis reaction) is a reaction where two or more elements or compounds (reactants) combine to form a single compound (product.

decomposition reaction is a reaction in which a compound breaks down into two or more simpler substances. The general form of a decomposition reaction is: AB→A+B. Most decomposition reactions require an input of energy in the form of heat, light, or electricity.

displacement reaction is the one wherein the atom or a set of atoms is displaced by another atom in a molecule. , when iron is added to a copper sulphate solution, it displaces the copper metal. A + B-C →A-C + B. The above equation exists when A is more reactive than B.

double displacement reaction is a type of chemical reaction in which the reactant ions exchange places to form new products. Usually, a double displacement reaction results in precipitate formation.

Answer 2

Answer:

1.       COMBINATION REACTION:    the reaction  in which  two or more element or  compound  combine together  to form  a single compound are called  combination reaction .

2.    DECOMPOSITION REACTION :   the reaction  in which  a single  compound  breaks  down  to give  two or  more  simpler substances are called  decomposition reaction

3.  DISPLACEMENT REACTION :    those reaction  in which more  reactive displaces  a  less reactive   element  from  its compound  ( or salt solution )  are called displacement reaction .

4.  DOUBLE  DISPLACEMENT  REACTION :  the reactions in which  two  or  different  atoms or group  of atoms  are exchanged  are called  double displacement  reaction  

                                  or

the reaction in which  two ionic compounds in the solution react by  exchange  of their   ions  two  form  new compounds are called double displacement reactions .