Multiple Choice Question Answer IV — task. Science CBSE, Class 10.

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1. Decomposition reaction is

Mostly exothermic
Mostly endothermic
That reaction in which one substance get decomposed into simpler substances
Both endothermic and substance get decompose

2. Which of the following reaction is/are example of reversible reaction, in closed container.

\(PCl_5\)(g) → \(PCl_3\)(g) + \(Cl_2\)(g)
\(CaCO_3\)(s) → \(CaO\)(s) + \(CO_2\)(g)
2HI(g) → \(H_2\)(g) + \(I_2\)(g)
All of these

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