631.

Among the given compound choose the two i.hat yield same carbocation on ionisation.

• (ii) and (iv)

• (i) and (ii)

• (ii) and (iii)

• (i) and (iii

An organic compound neither reacts neutral ferric chloride solution nor with Fehling solution. It however, reacts with Grignard reagent and gives positive iodoform test. The compound is:

The major product of the following reaction is:

The major product of the following reaction is:

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

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

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)