BITSAT SERIES Chemistry
Bond Energies
5 previous year questions.
Volume: 5 Ques
Yield: Medium
High-Yield Trend
1
2016 1
2014 1
2013 1
2012 1
2011 Chapter Questions 5 MCQs
01
PYQ 2011
medium
chemistry ID: bitsat-2
The correct bond order in the following species is:
1
O₂²⁻ < O₂ < O₂^+
2
O₂^+ < O₂ < O₂²⁻
3
O₂²⁻ < O₂^+ < O₂
4
O₂^+ < O₂²⁻ < O₂
02
PYQ 2012
medium
chemistry ID: bitsat-2
Bond enthalpies of , , and are in the ratio 2:1:2. If enthalpy of formation of is -50 kJ/mol , the bond enthalpy of is:
1
100 kJ/mol
2
300 kJ/mol
3
200 kJ/mol
4
400 kJ/mol
03
PYQ 2013
medium
chemistry ID: bitsat-2
For the dissociation reaction, , , heat of atomisation of H is
1
81 Kcal
2
162 Kcal
3
162 Kcal
4
218 Kcal
04
PYQ 2014
medium
chemistry ID: bitsat-2
The correct order of increasing C–O bond length in CO, CO , CO is:
1
CO < CO < CO
2
CO < CO < CO
3
CO < CO < CO
4
CO < CO < CO
05
PYQ 2016
medium
chemistry ID: bitsat-2
Given the following data: l c
Reaction & Energy change (kJ)
Li(s) → Li(g) & 161
Li(g) → Li⁺(g) & 520
(1)/(2)F₂(g) → F(g) & 77
F(g) + e⁻ → F⁻(g) & ?
Li⁺(g) + F⁻(g) → LiF(s) & -1047
Li(s) + (1)/(2)F₂(g) → LiF(s) & -617 Based on the data provided, the value of electron gain enthalpy of fluorine would be:
Li(s) → Li(g) & 161
Li(g) → Li⁺(g) & 520
(1)/(2)F₂(g) → F(g) & 77
F(g) + e⁻ → F⁻(g) & ?
Li⁺(g) + F⁻(g) → LiF(s) & -1047
Li(s) + (1)/(2)F₂(g) → LiF(s) & -617 Based on the data provided, the value of electron gain enthalpy of fluorine would be:
1
-300kJ mol⁻1
2
-350kJ mol⁻1
3
-328kJ mol⁻1
4
-228kJ mol⁻1