HSC Science (Electronics) १२ वीं कक्षा - Maharashtra State Board Question Bank Solutions

from the following pair would undergo S_N2 faster from the other?

from the following pair would undergo S_N2 faster from the other?

a. CH₃CH₂CH₂I      b. CH₃CH₂CH₂Cl

Complete the following reaction giving major products.

\[\ce{CH3 - CH = CH2 ->[HBr][peroxide] A ->[alc. KOH] B}\]

Complete the following reaction giving major products.

\[\begin{array}{cc}\ce{CH3 - CH = CH3 ->[Red P/Br2] A ->[Ag2O/H2O]B}\\|\phantom{.........................}\\
\ce{OH\phantom{.......................}}\end{array}\]

Complete the following reaction giving major product.

\[\begin{array}{cc}\ce{CH3\phantom{................}}\\
|\phantom{...................}\\
\ce{CH3 - C - CH2 - Cl ->[Na/dry ether] A}\\
|\phantom{...................}\\
\ce{CH3\phantom{................}}
\end{array}\]

Complete the following reaction giving major products.

Name the reagent used to bring about the following conversion.

Bromoethane to ethoxyethane

Name the reagent used to bring about the following conversion.

1-Chloropropane to 1-nitropropane

Name the reagent used to bring about the following conversion.

Ethyl bromide to ethyl isocyanide

Name the reagent used to bring about the following conversion.

Chlorobenzene to biphenyl

Arrange the following in the increasing order of boiling points.

1. 1-Bromopropane
2. 2- Bromopropane
3. 1- Bromobutane
4. 1-Bromo-2-methylpropane

Give reasons:

Haloarenes are less reactive than haloalkanes.

Distinguish between S_N1 and S_N2 mechanism of substitution reaction.

Convert the following:

Propene to propan-1-ol

Convert the following:

Benzyl alcohol to benzyl cyanide

Convert the following:

Ethanol to propane nitrile

Convert the following:

2-Chloropropane to propan-1-ol

Convert the following:

tert-Butyl bromide to isobutyl bromide

Choose the correct option.

Ethers are kept in air tight brown bottles because ______________.

HCl is added to a hydrocarbon ‘A’ \[\ce{(C4H8)}\] to give a compound ‘B’ which on hydrolysis with aqueous alkali forms tertiary alcohol ‘C’ \[\ce{(C4H10O)}\]. Identify ‘A’ ,‘B’ and ‘C’.