HSC Science (Electronics) 12th Standard Board Exam - Maharashtra State Board Important Questions

Give reason:

Reactions involving Grignard reagent must be carried out under anhydrous condition.

Give reason:

Alkyl halides are generally not prepared by free radical halogenation of alkanes.

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

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

The following will react faster by S_N1 mechanism

Name the reagent used to convert alkyl halide to ester.

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

Explain optical activity of 2-chlorobutane.

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

What is the action of following on ethyl bromide?

silver nitrite