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JEE Main 201912 AprilEvening Shift
Exam
JEE Main
Year
2019
Date
12 April
Shift
Evening Shift
Subject
Chemistry
Chapter
s Block Elements

JEE Main 2019 · 12 April · Evening Shift · Chemistry · s Block Elements

The incorrect statement is:

The incorrect statement is:

Options

  1. ALiNO3LiN{O}_{3} decomposes on heating to give LiNO2LiN{O}_{2} and O2.{O}_{2} .
  2. BLiClLiCl crystallises from aqueous solution as LiCl−2H2OLiCl - 2{H}_{2}O .
  3. CLithium is the strongest reducing agent among the alkali metals.
  4. DLithium is least reactive with water among the alkali metals.

Correct answer

A. LiNO3LiN{O}_{3} decomposes on heating to give LiNO2LiN{O}_{2} and O2.{O}_{2} .

Step-by-step solution

4LiNO3→Δ2Li2O+4NO2(g)+O2(g)4LiN{O}_{3}\overset{\Delta}{\to}2L{i}_{2}O + 4N{O}_{2}\left(g\right) + {O}_{2}\left(g\right)
Due to small size of Li+1,L{i}^{+ 1}, its hydration energy is high and forms hydrate salt undefined
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