HSC Science (General) 12th Standard Board Exam - Maharashtra State Board Important Questions for Chemistry

But-1-ene on reaction with HCl in the presence of sodium peroxide yields _______.

IUPAC name of is C₆H₅ − CH₂ − C − CH₂ − CH₂ − CH₂ − CH₃ is _______

(A) 1-Phenylhexan-2-one

(B) 6-Phenylhexan-5-one

(C) 1-Benzylhexan-5-one

(D) Dodecan-5-one

How is nitromethane prepared from the following?

alkyl halide

How is nitromethane prepared from the following?

α-nitroalkene

Draw a neat, labelled energy profile diagram for SN¹ reaction mechanism.

Identify 'A' in the following reaction -

(a) 2- Bromo-2 methylbutane

(b) 1 -Bromo-2,2-dimethylpropane

(c) 1 - Bromo - 3 -methylbutane

(d) 1 - Bromo- 2 -methylpropane

Complete and rewrite the balanced chemical equations

What is the action of the following on ethyl bromide
alcoholic solution of potassium hydroxide.

What is the action of the following on ethyl bromide:
moist silver oxide

Write a short note on Sandmeyer’s reaction. 

What are racemates?

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.

Why alkyl halides though polar are immiscible with water?

How is chlorobenzene converted into diphenyl/biphenyl?

Write a note on Friedel Craft’s acylation.

Draw structure of DDT.

Alkyl halides are -

(a) Mono halogen derivatives of alkanes 

(b) Di halogen derivatives of alkanes

(c) Tri halogen derivatives of alkanes

(d) Tetra halogen derivatives of alkanes

Write the structures of - 3-chloro-3-ethylhex-1-ene

which of the following carbocations is least stable?

(A) 

(B)

(C)

(D)

Why does p-nitrochlorobenzene undergo displacement reactions readily with attack of nucleophilic HO^{Θ ion}?