1
JEE Advanced 2021 Paper 2 Online
MCQ (Single Correct Answer)
+3
-1
The amount of energy required to break a bond is same as the amount of energy released when the same bond is formed. In gaseous state, the energy required for homolytic cleavage of a bond is called Bond Dissociation Energy (BDE) or Bond Strength. BDE is affected by s-character of the bond and the stability of the radicals formed. Shorter bonds are typically stronger bonds. BDEs for some bonds are given below :

Cl $$-$$ Cl (g) $$\to$$ Cl$$_{(g)}^ \bullet $$ + Cl$$_{(g)}^ \bullet $$ $$\Delta$$H$$^\circ$$ = 58 kcal mol$$-$$1
H3C $$-$$ Cl (g) $$\to$$ H3C$$_{(g)}^ \bullet $$ + Cl$$_{(g)}^ \bullet $$ $$\Delta$$H$$^\circ$$ = 85 kcal mol$$-$$1
H $$-$$ Cl (g) $$\to$$ H$$_{(g)}^ \bullet $$ + Cl$$_{(g)}^ \bullet $$ $$\Delta$$H$$^\circ$$ = 103 kcal mol$$-$$1

Cl $$-$$ Cl (g) $$\to$$ Cl$$_{(g)}^ \bullet $$ + Cl$$_{(g)}^ \bullet $$ $$\Delta$$H$$^\circ$$ = 58 kcal mol$$-$$1
H3C $$-$$ Cl (g) $$\to$$ H3C$$_{(g)}^ \bullet $$ + Cl$$_{(g)}^ \bullet $$ $$\Delta$$H$$^\circ$$ = 85 kcal mol$$-$$1
H $$-$$ Cl (g) $$\to$$ H$$_{(g)}^ \bullet $$ + Cl$$_{(g)}^ \bullet $$ $$\Delta$$H$$^\circ$$ = 103 kcal mol$$-$$1
For the following reaction
CH4(g) + Cl2(g) $$\buildrel {light} \over \longrightarrow $$ CH3Cl(g) + HCl (g)
the correct statement is
CH4(g) + Cl2(g) $$\buildrel {light} \over \longrightarrow $$ CH3Cl(g) + HCl (g)
the correct statement is
2
JEE Advanced 2021 Paper 1 Online
MCQ (Single Correct Answer)
+3
-1
Among the following, the conformation that corresponds to the most stable conformation of meso-butane-2,3-diol is
3
JEE Advanced 2020 Paper 1 Offline
MCQ (Single Correct Answer)
+3
-1
Newman projections P, Q, R and S are shown below :

Which one of the following options represents identical molecules?

Which one of the following options represents identical molecules?
4
JEE Advanced 2020 Paper 1 Offline
MCQ (Single Correct Answer)
+3
-1
Which of the following structures has the IUPAC name
3-ethynyl-2-hydroxy-4-methylhex-3-en-5-ynoic acid?
3-ethynyl-2-hydroxy-4-methylhex-3-en-5-ynoic acid?
Questions Asked from Basics of Organic Chemistry (MCQ (Single Correct Answer))
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