HSC Science (General) इयत्ता १२ वी - Maharashtra State Board Important Questions for Chemistry

Explain. Aryl halides are less reactive than alkyl halides towards nucleophilic substitution reactions.

Explain optical activity of 2-chlorobutane.

How are the following conversions carried out?

propene to 2-nitropropane

How are the following conversions carried out?

benzene to biphenyl

Write the equations for the preparation of ethyl chloride using

1. Hydrogen halide
2. ethene
3. Thionyl chloride

Which of these methods is preferred and why?

What is dehydrohalogenation? State the rule for the formation of the preferred product of dehydrohalogenation.

Observe the following compounds and answer the questions given below.

      (I)

\[\ce{\underset{\text{(II)}}{CH3 - CH2 - Br}}\]

1. Identify the type of halides.
2. Explain the nature of the C – Br bond in both of these halides.
3. Which of these compounds will undergo aqueous alkaline hydrolysis readily? Write the reaction in support of your answer.

Write the product formed when alkyl halide reacts with silver nitrite.

What is the action of following on ethyl bromide:

Na in dry ether

Write chemical reactions for the following conversions:

Bromobenzene to toluene.

Write IUPAC names of following compounds.

Write IUPAC names of following compounds.

The allylic halide, among the following, is ______.

Write the chemical reaction for the following:

Chlorobenzene is heated with fuming H₂SO₄.

Write the structure of the product formed when chlorobenzene is treated with sodium metal in the presence of dry ether.

Explain the dehydrohalogenation reaction of 2-chlorobutane.

Write use of CFC.

Write environmental effect of CFC.

Write the product formed by Chlorobenzene treated with a fuming H₂SO₄ reaction.

What is the action of following on ethyl bromide?

silver nitrite