Increasing order of reactivity of the following compounds for S_N1 substitution is:

• (B) < (C) < (D) < (A)

• (A) < (B) < (D) < (C)

• (B) < (C) < (A) < (D)

• (B) < (A) < (D) < (C)

Which of the following potential energy (PE) diagrams represents the S_N1 reaction?

The major product of the following reaction is

CH₃C≡CH $\underset{(\mathrm{ii}0 \mathrm{Dl}}{\overset{\left(\mathrm{i}\right)\hspace{0.17em}\mathrm{DCl} (equilaterent.)}{\to }}$

• CH₃C (I) Cl CHD₂

• CH₃CD (Cl) CHD (I)

• CH₃CD₂CH(Cl) (I)

• CH₃CD(I)CHD (Cl)

The increasing order of reactivity of the following compounds towards aromatic electrophilic substitution reaction is

• D < A < C < B

• B < C < A < D

• D < B < A< C

• A < B < C < D

175.

The one that will show optical activity is: (en = ethane – 1,2, -diamine)

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Increasing rate of S_N1 reaction in the following compounds is :

• (B)<(A)<(C)<(D)

• (A)<(B)<(D)<(C)

• (B)<(A)<(D)<(C)

• (A)<(B)<(C)<(D)

The major product of the following reaction is :

Freon used as refrigerant is

• CF₂=CF₂

• CH₂F₂

• CCl₂F₂

• CF₄

2-Phenylethylbromide when heated with NaOEt, elimination takes place. No deuterium exchange takes place when the reaction is carried out in C₂H₅OD solvent. The mechanism will be

• E1 elimination

• E2 elimination

• E1 cB elimination

• E2 or E1cB

For the following reactions,

i) CH₃ CH₂ CH₂Br + KOH --> CH₃CH=CH₂ +KBr +H₂O

ii)  


iii) 

• (i) is elimination reaction, (ii) is substitution reaction, and (iii) is addition reaction.

• (i) is elimination reaction, (ii) is addition reaction, (iii) is substitution reactions.

• (i) is substitution, (ii) addition reaction (iii) is addition reactions

• (i) is substitution, (ii) addition reaction (iii) is addition reactions