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

Complete the reaction:

\[\ce{CH3CH2Cl ->[AgCN][alc.\Delta]}\] ?

 How is propene converted into 1- bromopropane and 2 - bromopropane?

The preparation of alkyl fluoride from alkyl chloride, in presence of metallic fluorides is known as ______________.

Identify the product ‘D’ in the following sequence of reactions:

\[\ce{H3C - CH2 - CH2 - Cl \underset{KOH}{\overset{Alc}{->}} 'B' \overset{HBr}{->} 'C' \underset{Elther}{\overset{Na}{->}}'D'}\]

Identify ‘A’ and ‘B’ in the following reaction :

\[\ce{CH3 - CH = CH2 ->[HBr]'A' ->[alc.KOH]'B'}\]

Discuss the mechanism of alkaline hydrolysis of bromomethane.

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

State and explain Markownikoff's rule with suitable example

which of the following carbocations is least stable?

(A) 

(B)

(C)

(D)

What is the action of bromine in alkaline medium on

i. CH₃CH₂NO₂

ii. 

Write the structures of -1-Iodo-2, 3-dimethylbutane

Write the structures of - 1, 3, 5 - tribromobenzene

A gas when passed through K₂Cr₂O₇ and dil. H₂SO₄ solution turns it green, the gas is

(A) CO₂

(B) NH₃

(C) SO₂

(D) Cl₂

How is ethanoic acid prepared from dry ice?

The stability order for carbocation is _______.

(A) 2° > 3° > 1° 

(B) 3° > 2° > 1°

(C) 3° > 1° > 2°

(D) 1° > 3° > 2°

Identify A and B in the following reaction:

`CH_3-Br+Mg"dry ether"/""A+CO_2"dry ether"/(H^+/(H_2O))B+Mg(Br)OH`

How are the following conversions carried out?

2-methylbutan-1-ol into 2 -methylbutanoic acid.

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