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Total  structural isomers for C₄H₈ are
1. 3
2. 5
3. 4
4. 2 

Which hydrocarbon is most acidic?

The most stable carbocation is

The aromatic compound is

Which alkene is most stable?
1. ${\mathrm{CH}}_2=\mathrm{CH}-{\mathrm{CH}}_2-{\mathrm{CH}}_3$
2. $\left({\mathrm{CH}}_3\right)C-CH=C{H}_2$
3. ${\mathrm{CH}}_3-\mathrm{CH}=\mathrm{CH}-{\mathrm{CH}}_3$
4. ${\left({\mathrm{CH}}_3\right)}_{2}C=C{\left(C{H}_3\right)}_2$

In the above compound, the correct order of
hydrogen as H⁺ is
1. 1 > 2 > 3
2. 2 > 3 > 1
3. 2 > 1 > 3
4. 3 > 2 > 1

Consider the following resonating structures of
HCOOH

The order of stability is
1. I > II > III > IV
2. IV > I > II > III
3. I > III > II > IV
4. II > I > III > IV

Which compound is most reactive towards
electrophilic substitution reaction?
1. Phenol
2. Aniline
3. Toluene
4. Methoxy benzene

C₄H₆ may have
1. One triple bond
2. Two double bonds
3. Two cycles
4. All of these

Consider the following carbocations.

The correct order of stability is
1. II > III > I > IV
2. III > I > II > IV
3. III > I > IV > II
4. II > IV > I > III

The most stable free radical is

in the above compound, at which bond proton
(H⁺) attacks fastest?
1. A
2. B
3. C
4. D

The correct order of abstraction of hydrogen
towards homolytic fission is
1. 2 > 4 > 3 > 5 > 1
2. 4 > 2 > 5 > 3 > 1
3. 4 > 2 > 3 > 5 > 1
4. 4 > 3 > 2 > 5 > 1

The strongest acid is
1. HCOOH
2. C₆H₅COOH
3. ${\mathrm{CH}}_3-{\mathrm{CH}}_2-\mathrm{COOH}$
4. ${\left({\mathrm{CH}}_3\right)}_{2}CH-COOH$

Which of the following is the strongest base in
water?