29. NCERT Exemplar II

Exercise condition:

2 m.

Choose all possible answers:

1. The following \(4NH_\)3(g) + \(5O_2\)(g) → \(4NO\)(g) + \(6H_2O\)(g) reaction is an example of__________.

combination reaction
redox reaction
neutralisation reaction
displacement reaction
displacement and combination

2. A dilute ferrous sulphate solution was gradually added to the beaker containing acidified permanganate solution. The light purple colour of the solution fades and finally disappears. Which of the following is the correct explanation for the observation?

\(KMnO_4\) is an oxidising agent, it oxidises \(FeSO_4\)
The colour disappears due to dilution; no reaction is involved
\(KMnO_4\) is an reducing agent, it oxidises \(FeSO_4\)
\(FeSO_4\) act as an oxidising agent,and oxidises \(KMnO_4\)
\(KMnO_4\) is an unstable compound and decomposes in presence of \(FeSO_4\) to a colourless compound

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