Which of the following is/are aromatic structure(s)?

a.		b.
c.		d.

 

1.	a and b	2.	b and c
3.	c and d	4.	a and c

The dihedral angle of the least stable conformer of ethane is:

The major product of the following chemical reaction is:

1.
2.
3.
4.

What reagents are used to convert ethanoic acid into ethane?

The correct reagent that is used for the following reaction is: 

${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_3\stackrel{?}{⟶}{\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{CHO}$

1. Manganese acetate

2. Copper at high temperature and pressure

3. Molybdenum oxide

4. Potassium permanganate

Which of the following is a free radical substitution reaction?

1. Benzene with Br₂/AlCl₃

2. Acetylene with HBr

3. Methane with Br₂/hv

4. Propene with HBr/(C₆H₅COO)₂

Among the following reactions, the incomplete combustion of methane is:

Arrange the following alkyl halides in decreasing order of the rate of $\mathrm{\beta }$-elimination reaction with alcoholic KOH.

A.
B.	CH3-CH2-Br
C.	CH3-CH2-CH2-Br

1. A > B > C

2. C > B > A

3. B > C > A

4. A > C > B

Match the reagent from Column I which on reaction with CH₃-CH=CH₂ gives the same product given in Column II as per the codes given below

Codes:

The correct order of decreasing reactivity of the following compounds:

Chlorobenzene, 2,4-Dinitrochlorobenzene, and p-Nitrochlorobenzene

with an electrophile (E⁺)  is :