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

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.

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}?

Write the environmental effects of DDT.

Explain only reaction mechanism for alkaline hydrolysis of tert-butyl bromide

Give balanced equations for the following reactions:

Acetic anhydride with phosphorus pentachloride.

Explain metamerism with suitable examples of ethers

Ethylidene dichloride when boiled with aqueous solution of NaOH yields _______.

(A) formaldehyde

(B) acetaldehyde

(C) acetone

(D) ethyl methyl ketone

Natalite is a mixture of

(a) diethyl ether and methanol

(b) diethyl ether and ethanol

(c) dimethyl ether and methanol

(d) dimethyl ether and ethanol

Which of the following compounds is NOT prepared by the action of alcoholic NI₃ on alkyl halide?

(a) CH₃NH₂

(b) CH₃- CH₂- NH₂

(c) CH₃ - CH₂ - CH₂ - NH₂

(d) (CH₃)₃ C- NH₂

Write the structure and IUPAC name of 'methyl-n-propyl ether'.

What is the action of hot HI on it?

3-Methylbutane-2-ol on heating with HI gives ______

How is phenol converted into the following?

picric acid

Choose the correct option.

Which of the following substrate will give ionic organic products on reaction?

Anisole on heating with concentrated HI gives ______.