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Model Paper 10 — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETModel Paper 104 Marks
MCQ
Which of the following compounds readily decomposes on heating to give ionic compound with higher value of lattice energy as compare to corresponding reactant?
i. $Li _2 CO _3$
ii. $LiBF _4$
iii. $BeSO _4$
iv. $Na _2 O _2$
v. $BeCO _3$
  • A
    All of these
  • B
    i, iii, iv, v
  • C
    i, iv, v
  • D
    i, v
✓

Answer

A. All of these
Explanation :
$Li _2 CO _3 \xrightarrow{\Delta} Li _2 O + CO _2$
$LiBF _4 \xrightarrow{\Delta} LiF + BF _3$
$BeSO _4 \xrightarrow{\Delta} BeO + SO _2+\frac{1}{2} O _2$
$Na _2 O _2 \xrightarrow{\Delta} Na _2 O +\frac{1}{2} O _2$
$BeCO _3 \xrightarrow{\Delta} BeO + CO _2$
In all of these above reactions, the lattice energy of the product is higher as compared to the reactant.

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