I > II > III > IV
IV > III > I > II
IV > III > II > I
II > I > IV > III

Solution

Triangular planar
Square pyramidal
Trigonal bipyramidal
Tetrahedral

Solution

The number of isomers of the compound C₂BrFCl is

Solution

Taking any two halogens, the possible structural isomers for the alkene can be three.

Directing influence of the methyl group can be explained on the basis of

inductive effect
electromeric effect
resonance effect
no-bond resonance

Solution

Methyl group can’t produce electromeric and resonance effects. Inductive effect affects all the three positions of the ring in decreasing order of ortho >meta >para. It shows hyper conjugation (no-bond resonance) which explains beautifully the o, p-directing influence of the CH₃ group

Z > X > Y
Y > Z > X
Z< X > Y
X > Y > Z

Solution

Carboxylic acids are stronger acids than NH₃ because the corresponding conjugate base (–COO^-) is more stable than –NH₃. Hence Y is the strongest acid.Since –COOH has –I effect which decreases with distance, therefore, effect is more pronounced in Z than in X. As a result, Z is more acidic than X. Hence the true option is Y > Z > X

In Carius method 0.099 g organic compound gave 0.287 g AgCl. The percentage of chlorine in the compound will be

28.6
71.7
35.4
64.2

Solution

C – H bond energy is about 101 kcal/mol for methane,ethane and othera lkanes but is only 77 kcal/mol for C – H bond of CH₃ in toluene. This is because :