What is combination reaction in simple language jabardast concept +trick

What is the correct combination for the reaction :

What is Combination reaction ? Explain with the help of chemical reaction .

Reactions can be classified as follows: Direct combination, decomposition, simple displacement, double decomposition and neutralisation. State which of the above types takes place in the reactions given below. 2Mg+O_(2)to2MgO

Reactions can be classified as follows: Direct combination, decomposition, simple displacement, double decomposition and neutralisation. State which of the above types takes place in the reactions given below. NaOH+HCl toNaCl+H_(2)O

Reactions can be classified as follows: Direct combination, decomposition, simple displacement, double decomposition and neutralisation. State which of the above types takes place in the reactions given below. AgNO_(3)+HCl toAgCl+HNO_(3)

State why a direct combination reaction is called a-synthesis reaction.

Reactions can be classified as follows: Direct combination, decomposition, simple displacement, double decomposition and neutralisation. State which of the above types takes place in the reactions given below. Cl_(2)+2KIto2KCl+I_(2)

Reactions can be classified as follows: Direct combination, decomposition, simple displacement, double decomposition and neutralisation. State which of the above types takes place in the reactions given below. 4HNO_(3)to4NO_(2)+2H_(2)O+O_(2)

Differenctiate between,- a. Direct combination reaction & a decomposition reaction b. Displacement reaction & a neutralization reaction.

Why are decomposition reactions called the opposite of combination reactions? Write equations for these reactions.