HSC Science (Electronics) १२ वीं कक्षा - Maharashtra State Board Important Questions

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.

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?