Hydrocarbons

Among the following, the reaction that proceeds through an electrophilic substitution, is :

1. [figure]
2. [figure]
3. [figure]
4. [figure]

The most suitable reagent for the following conversion, is : [figure]

1. Zn / HCl
2. Hg2+/H+, H2O
3. Na / liquid NH3
4. H2, Pd/C, quinoline

An alkene “A” on reaction with O3 and Zn + H2O gives propanone and ethanal in equimolar ratio. Addition of HCl to alkene “A” gives “B” as the major product. The structure of product “B” is :

1. H3C-CH2- Cl | CH3 |C-CH3
2. H3C- Cl |CH- CH3 | CH3 |CH
3. Cl-CH2-CH2- CH3 | CH3 |CH
4. H3C-CH2- CH2Cl |CH-CH3

Hydrocarbon (A) reacts with bromine by substitution to form an alkyl bromide which by Wurtz reaction is converted to gaseous hydrocarbon containing less than four carbon atoms. (A) is

1. CH CH
2. CH2 = CH2
3. CH3 - CH3
4. CH4

Predict the correct intermediate and product in the following reaction : H3C-C CH [HgSO4]H2O, H2SO4 (A)Intermediate (B)Product

1. A : H3C- OH |C=CH2 B : H3C- SO4 |C=CH2
2. A : H3C- O \|C-CH3 B : H3C-C CH
3. A : H3C- OH |C=CH2 B : H3C- O \|C-CH3
4. A : H3C- SO4 |C=CH2 B : H3C- O \|C-CH3

Consider the nitration of benzene using mixed conc. H2SO4 and HNO3. If a large amount of KHSO4 is added to the mixture, the rate of nitration will be

1. unchanged
2. doubled
3. faster
4. slower

In the reaction H-C CH [(ii) CH3CH2Br](i) NaNH2/liq. NH3 X [(ii) CH3CH2Br](i) NaNH2/liq. NH3 Y, X and Y are

1. X = 2-Butyne, Y = 2-Hexyne
2. X = 1-Butyne, Y = 2-Hexyne
3. X = 1-Butyne, Y = 3-Hexyne
4. X = 2-Butyne, Y = 3-Hexyne

Which of the following can be used as halide component for Friedel-Crafts reaction?

1. Chlorobenzene
2. Bromobenzene
3. Chloroethene
4. Isopropyl chloride

Which of the following compounds shall not produce propene by reaction with HBr followed by elimination or direct only elimination reaction ?

1. [figure]
2. H3C- H2 |C-CH2OH
3. H2C=C=O
4. H3C- H2 |C-CH2Br

In the given reaction, [figure] the product P is

1. [figure]
2. [figure]
3. [figure]
4. [figure]