24. Select the right answers: NCERT- Exemplar questions - III

5 m.

Choose the best answer:

1. Which of the following gases can be used for storage of fresh sample of an oil for a long time?

2. Which of the following are combination reactions?

\(Zn\) + \(FeSO_4\) → \(ZnSO_4\) + \(Fe\)
\(MgO\) + \(H_2O\) → \(Mg(OH)_2\)
\(2KClO_3\) → \(2KCl\) + \(3O_2\)
\(4Al\) + \(3O_2\) → \(2Al_2O_3\)
\(2S_2H\) + \(3O_2\) → \(2H_2O\) + \(2SO_2\)

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