HSC Science (Computer Science) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions

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’.

Complete the following reaction sequence by writing the structural formulae of the organic compound 'A', 'B' and 'C'.

\[\ce{2-Bromobutane->[Alc.KOH]A->[][Br2]B->[][NaNH2]C}\]

Complete the following reaction sequence by writing the structural formulae of the organic compound 'A', 'B' and 'C'.

\[\ce{Isopropyl alcohol ->[\triangle][PBr3] A ->[][NH3 excess] B}\]

Observe the following and answer the question given below.

Name the type of halogen derivative.

Observe the following and answer the question given below.

Comment on the bond length of C–X bond in it.

Observe the following and answer the question given below.

Can it react by S_N1 mechanism? Justify your answer.

Answer the following in one sentence.

What is formalin?

Answer the following in one sentence.

Arrange the following compounds in the increasing order of their boiling points:

Formaldehyde, ethane, methyl alcohol.