Question

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


NCERT Class 10th Science Chapter 1 Chemical Reactions and Equations

Answer 1

in decomposition reaction, a single reactant split to form two product where as inn combination reaction two reactant split to form one product....that is why it is called opposite
     e.g combination-----c+o2---> c02
     decomposition-----
caco3 -----heat--> cao +c02