HSC Science (Computer Science) इयत्ता १२ वी - Maharashtra State Board Important Questions

The reagents used to convert phenol to 2,4,6-tribromophenol is _____________

Draw intramolecular hydrogen bonding structure in o-nitrophenol.

What is the action of following reagents on pent-3-enal?

1. H₂/Ni
2. LiAlH₄/H₃O⁺

Write chemical equation of acetyl chloride with phenol

What is the action of following on phenol at low temperature?

1. dil. HNO₃
2. conc. H₂SO₄
3. Br₂/CS₂

How will you bring about the following conversions?

isopropyl alcohol to acetone

How will you bring about the following conversions?

2-methyl propan-2-ol to 2-methylpropene

How will you bring about the following conversions?

acetone to 2-methylpropan-2-ol

An organic compound gives hydrogen on reaction with sodium metal. It forms an aldehyde with molecular formula C₂H₄O on oxidation with pyridinium chlorochromate. Give the chemical equations in support of these observations.

Explain the fact that in alkyl aryl ethers, the alkoxy group is ring activating and ortho/para directing towards electrophilic aromatic substitution.

How will you prepare diethyl ether by dehydration of alcohol?

Write chemical reactions of following reagents on methoxyethane:

hot HI

Convert the following:

Ethyl alcohol into ethyl acetate.

Write preparation of diethyl ether.

Convert the following :

cumene to phenol.

Write the reactions involved in dehydration of 1°, 2° and 3° alcohols.

Which among the following reducing agents is NOT used to reduce acetaldehyde to ethyl alcohol?

(A) Na-Hg and water

(B) Zn-Hg and conc. HCl

(C) H2-Raney Ni

(D) LiAlH4/H+

How are the following compounds prepared?

Benzyl alcohol from benzyl chloride.

Identify the compound 'B' in the following series of reaction:

(A) n-propyl chloride

(B) Propanamine

(C) n-propyl alcohol

(D) Isoproply alcohol

Which of the following reagents is best for the following conversion?

(A) LiAlH₄

(B) 

(C) H₂/Ni, 453 K

(D) Zn-Hg+HCl_(con)