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

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Convert the following :

cumene to phenol.

Appears in 1 question paper
Chapter: [11] Alcohols, Phenols and Ethers
Concept: Preparation of Alcohols and Phenols

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

Appears in 1 question paper
Chapter: [11.01] Alcohols
Concept: Addiction > Alcohol >> Mechanism of Dehydration of 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+

Appears in 1 question paper
Chapter: [11.01] Alcohols
Concept: Addiction > Alcohol >> Methods of Preparation

How are the following compounds prepared?

Benzyl alcohol from benzyl chloride.

Appears in 1 question paper
Chapter: [11.01] Alcohols
Concept: Addiction > Alcohol >> Methods of Preparation

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

(A) n-propyl chloride

(B) Propanamine

(C) n-propyl alcohol

(D) Isoproply alcohol

Appears in 1 question paper
Chapter: [11.01] Alcohols
Concept: Addiction > Alcohol >> Methods of Preparation

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

(A) LiAlH4

(B) 

(C) H2/Ni, 453 K

(D) Zn-Hg+HCl(con)

Appears in 1 question paper
Chapter: [11.01] Alcohols
Concept: Addiction > Alcohol >> Methods of Preparation

How is ethanol prepared from methanal by using Grignard reagent?

Appears in 1 question paper
Chapter: [11.01] Alcohols
Concept: Addiction > Alcohol >> Methods of Preparation

`CH_3-CH_2-Br"Alcoholic KOH"/""> B " HBR"/"">C"Na/Eather"/"">D`, the Compound D is

(A) ethane

(B) propane

(C) n-butane

(D) n-pentane

Appears in 1 question paper
Chapter: [11.01] Alcohols
Concept: Chemical Properties of Alcohols and Phenols

Which of the following is the first oxidation product of secondary alcohol?

(A) Alkene

(B) Aldehyde

(C) Ketone

(D) Carboxylic acid

Appears in 1 question paper
Chapter: [11.01] Alcohols
Concept: Addiction > Alcohol >> Secondary and Tertiary Alcohols

How will you prepare ethanol, propan-2-ol and 2-methylpropan-2-ol from Grignard’s reagent?

Appears in 1 question paper
Chapter: [11.01] Alcohols
Concept: Addiction > Alcohol >> Methods of Preparation

How are the following compounds prepared?

Propan-1-ol from propanal

Appears in 1 question paper
Chapter: [11.01] Alcohols
Concept: Addiction > Alcohol >> Methods of Preparation

Propene on oxidation with diborane in presence of alkaline hydrogen peroxide gives

(a) propane-1- ol

(b) propane-2-ol

(c) allyl alcohol

(d) propane-1, 2-diol

 

Appears in 1 question paper
Chapter: [11.01] Alcohols
Concept: Addiction > Alcohol >> Methods of Preparation

Write resonance structures of aniline. What is the action of benzene diazonium chloride on ethanol? 

Appears in 1 question paper
Chapter: [11.01] Alcohols
Concept: Commercially Importance Alcohols

Identify A and B respectively in the following reaction:
\[\ce{tert-butyl alcohol ->[20‰H2SO4][363K] A + H2O ->[HBr][H2O2] B}\]

Appears in 1 question paper
Chapter: [11.01] Alcohols
Concept: Addiction > Alcohol >> Methods of Preparation

Write chemical reactions to prepare ethanamine from:

Acetonitrile

Appears in 1 question paper
Chapter: [11.01] Alcohols
Concept: Addiction > Alcohol >> Methods of Preparation

Write chemical reactions to prepare ethanamine from:

Nitroethane

Appears in 1 question paper
Chapter: [11.01] Alcohols
Concept: Addiction > Alcohol >> Methods of Preparation

Write chemical reactions of following reagents on methoxyethane:

dilute H2SO4

Appears in 1 question paper
Chapter: [11.01] Alcohols
Concept: Commercially Importance Alcohols

Convert the following:

acetaldehyde to isopropyl alcohol.

Appears in 1 question paper
Chapter: [11.01] Alcohols
Concept: Chemical Properties of Alcohols and Phenols

Identify the weakest acidic compound amongst the following

(a) p-nitrophenol                 

(b) p-chlorophenol

(c) p-cresol                         

(d) p-raminophenol

Appears in 1 question paper
Chapter: [11.02] Phenols
Concept: Phenols >> Physical and Chemical Properties

Phenelzine is used as an

(a)  analgesic                      

(b) antiseptic

(c) antipyretic

(d) antidepressant

Appears in 1 question paper
Chapter: [11.02] Phenols
Concept: Phenols >> Uses of Phenols
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