Question

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.

Answer 1

A) 2NaOH -> 2Na + O2 + H2
is not correct since Na is unstable

B) 2NaOH -> 2Na + H2O + 1/2O2
is not correct since Na is unstable

C) 2NaOH -> Na2O + H2O
is correct since N2O is stable

D) 2NaOH -> 2Na + H2O2
is not correct since Na is unstable

Answer 2

Answer: 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:

$2NaOH\rightarrow Na_2O+H_2O$

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.