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

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What is the action of the following on ethyl bromide?

silver acetate

Appears in 2 question papers
Chapter: [10.01] Haloalkanes
Concept: Reactions of Haloalkanes - Nucleophilic Substitution Reactions

What is Grignard reagent?

Appears in 2 question papers
Chapter: [10.02] Haloarenes
Concept: Reactions of Haloarenes - Nucleophilic Substitution

What is metamerism? 

Appears in 2 question papers
Chapter: [11] Alcohols, Phenols and Ethers
Concept: Nomenclature of Alcohols, Phenols and Ethers

How is phenol converted into the following?

benzoquinone

Appears in 2 question papers
Chapter: [11] Alcohols, Phenols and Ethers
Concept: Nomenclature of Alcohols, Phenols and Ethers

Arrange the following in decreasing order of acid strength.

CH3OH, CH3–CH2–OH, CH3–CH(OH)–CH3, (CH3)3–C–OH

Appears in 2 question papers
Chapter: [11] Alcohols, Phenols and Ethers
Concept: Preparation of Alcohols and Phenols

Write the reaction involved in the preparation of phenol from benzene sulphonic acid.

Appears in 2 question papers
Chapter: [11] Alcohols, Phenols and Ethers
Concept: Preparation of Alcohols and Phenols

Compound ‘A’ with molecular formula C6H5Cl is fused with NaOH at high temperature under pressure to give compound ‘B’. Compound ‘B’ on treatment with dil.HCl gives compound C having characteristic carbolic odour. Write the chemical equations in support of this. Name the process and give uses of compound C.

Appears in 2 question papers
Chapter: [11] Alcohols, Phenols and Ethers
Concept: Uses of Alcohols, Phenols and Ethers

Write a chemical reaction for the following conversion:

Acetic acid into ethyl alcohol.

Appears in 2 question papers
Chapter: [11] Alcohols, Phenols and Ethers
Concept: Nomenclature of Alcohols, Phenols and Ethers

What is the action of bromine water on carbolic acid?

Appears in 2 question papers
Chapter: [11.02] Phenols
Concept: Phenols >> Methods of Preparation

How carbolic acid is prepared from benzene sulphonic acid ?

Appears in 2 question papers
Chapter: [11.02] Phenols
Concept: Phenols >> Phenols

How is phenol prepared from cumene?

Appears in 2 question papers
Chapter: [11.02] Phenols
Concept: Phenols >> Methods of Preparation

How will you obtain the following? (Give balanced equation.)

Ethyl chloride from diethyl ether.

Appears in 2 question papers
Chapter: [11.03] Ethers
Concept: Ethers >> Physical and Chemical Properties of ether

Write chemical equation for the following:
Gatterman - Koch formylation

Appears in 2 question papers
Chapter: [12] Aldehydes, Ketones and Carboxylic Acids
Concept: Preparation of Aldehydes and Ketones

Write chemical equation for the following :
Rosenmund reduction

Appears in 2 question papers
Chapter: [12] Aldehydes, Ketones and Carboxylic Acids
Concept: Preparation of Aldehydes and Ketones

Correct order of acid strength for

  1. acetic acid
  2. fluoroacetic acid
  3. 4-Nitrobenzoic acid 
  4. 4-Methyl benzoic acid is ______.
Appears in 2 question papers
Chapter: [12] Aldehydes, Ketones and Carboxylic Acids
Concept: Chemical Properties of Carboxylic Acids

Write the name of the product when ketones react with 1,2-diol in presence of dry HCl.

Appears in 2 question papers
Chapter: [12] Aldehydes, Ketones and Carboxylic Acids
Concept: Chemical Properties of Aldehydes and Ketones

Write a classification of aliphatic ketones with a suitable example.

Appears in 2 question papers
Chapter: [12] Aldehydes, Ketones and Carboxylic Acids
Concept: Classification of Aldehydes, Ketones and Carboxylic Acids

How acetone is converted into propane.

Appears in 2 question papers
Chapter: [12] Aldehydes, Ketones and Carboxylic Acids
Concept: Chemical Properties of Aldehydes and Ketones

Explain Aldol condensation of ethanal.

Appears in 2 question papers
Chapter: [12] Aldehydes, Ketones and Carboxylic Acids
Concept: Chemical Reactions of Aldehydes and Ketones - Reactions Due to α-hydrogen

Write mechanism of Aldol addition reaction.

Appears in 2 question papers
Chapter: [12.01] Aldehydes and Ketones
Concept: Concepts of Aldehydes, Ketones, and Carboxylic Acids >> Reactivity of Alpha Hydrogen in Aldehydes
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