Which of the following decomposition reactions is/are correct?
a) 2naoh 2na + o2 + h2
b) 2naoh 2na + h2o + 1/2o2
c) 2naoh na2o + h2o
d) 2naoh 2na + h2o2

both reactions a & b are correct.
only reaction a is correct.
only reaction d is correct.
only reaction c is correct.

The correct statement is only reaction C is correct.

Explanation:

Decomposition reaction is defined as the reaction in which one large compound breaks down into smaller compounds.

NaOH is a base known as sodium hydroxide. The decomposition reaction for sodium hydroxide follow the equation:

By Stoichiometry of the reaction:

2 moles of sodium hydroxide decomposes into 1 mole of sodium oxide and 1 mole of water.

Hence, the correct statement is only reaction C is correct.