Combination and decomposition reaction — task. Chemistry CBSE Live product, Class 10 (2026-27).

Choose the correct answer:

Which of the following is a decomposition reaction?

\(NaOH + HCl → NaCl + H_2O\)
\(2H_2O → 2H_2 + O_2\)
\(Zn + H_2SO_4 → ZnSO_4+ H_2\)
\(H_2 + Cl_2 → 2HCl\)

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