sblock Elements - Result Question 6
####2. The incorrect statement is
(2019 Main, 12 April II)
(a) lithium is the strongest reducing agent among the alkali metals.
(b) lithium is least reactive with water among the alkali metals.
(c) $LiNO _3$ decomposes on heating to give $LiNO _2$ and $O _2$.
(d) $LiCl$ crystallise from aqueous solution as $LiCl \cdot 2 H _2 O$.
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Answer:
Correct Answer: 2. (b)
Solution:
- Statement (c) is incorrect. $LiNO _3$ (Lithium nitrate) on heating gives a mixture of $Li _2 O, NO _2$ and $O _2$.
$$ 4 LiNO _3 \stackrel{\Delta}{\longrightarrow} 2 Li _2 O+4 NO _2 \uparrow+O _2 \uparrow $$
Among the alkali metals, lithium is the strongest reducing agent.
