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Question
State why a direct combination reaction is called a – ‘synthesis reaction’.
Solution
When two or more substances [element with element or element with compound or compound with another compound] combine to form a new compound with new properties. Hence direct combination is called a ‘synthesis reaction’.
Example: Hydrogen (a gas) + Oxygen (a gas) combines to form water (liquid).
\[\ce{2H2 + O2->2H2O}\]
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