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

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Vitamin ‘C’ belongs to the class of—

(a) Vitamins of aliphatic series

(b) Vitamins of aromatic series

(c) Vitamins of alicyclic series

(d) Vitamins of heterocyclic series

 

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Chapter: [14.03] Vitamins
Concept: Biomolecules in the Cell > Vitamins >> Classification of Vitamins

Inflammation of the tongue is due to the deficiency of:

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Chapter: [14.03] Vitamins
Concept: Biomolecules in the Cell > Vitamins >> Important Vitamins, Their Sources and Their Deficiency Diseases

Which of the following vitamins is the vitamin of alicyclic series?

(A) Vitamin C

(B) Vitamin K

(C) Vitamin B

(D) Vitamin A

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Chapter: [14.03] Vitamins
Concept: Biomolecules in the Cell > Vitamins >> Important Vitamins, Their Sources and Their Deficiency Diseases

What are the sources of Vitamin C and Vitamin K?

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Chapter: [14.03] Vitamins
Concept: Biomolecules in the Cell > Vitamins >> Classification of Vitamins

Give scientific reasons:

α-Amino acids have high melting points compared to the corresponding amines or carboxylic acids of comparable molecular mass.

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Chapter: [14.03] Vitamins
Concept: Biomolecules in the Cell > Proteins

Write industrial application of enzyme catalysis.

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Chapter: [14.03] Vitamins
Concept: Biomolecules in the Cell > Proteins

Define α-amino acids.

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Chapter: [14.03] Vitamins
Concept: Biomolecules in the Cell > Proteins

Give scientific reasons:

On complete hydrolysis DNA gives equimolar quantities of adenine and thymine.

Appears in 1 question paper
Chapter: [14.04] Nucleic Acids
Concept: Biomolecules in the Cell > Nucleic Acids

The sugar component of nucleotide unit in RNA is _________________

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Chapter: [14.04] Nucleic Acids
Concept: Biomolecules in the Cell > Nucleic Acids

In which of the following structure of DNA carries genetic information of the organism?

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Chapter: [14.04] Nucleic Acids
Concept: Biomolecules in the Cell > Nucleic Acids

Draw structure of following.

2-Deoxy-D-ribose

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Chapter: [14.04] Nucleic Acids
Concept: Biomolecules in the Cell > Nucleic Acids

Give names of the purines.

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Chapter: [14.04] Nucleic Acids
Concept: Biomolecules in the Cell > Nucleic Acids

How are polythene and neoprene prepared?

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Chapter: [15] Polymers
Concept: Types of Polymerisation Reactions - Addition Polymerisation or Chain Growth Polymerisation

Amongst the followings, identify a copolymer?

(a) Orion                            

(b) PVC

(c) PHBV

(d) Teflon

Appears in 1 question paper
Chapter: [15] Polymers
Concept: Types of Polymerisation Reactions - Copolymerisation

0.1 mole of Buckminster fullerene contains how many kg of carbon? [Atomic mass of carbon = 12]

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Chapter: [15] Polymers
Concept: Classification of Polymers> Based on Source or Origin

What is natural rubber?

(A) Cis-1,4-polyisoprene

(B) Neoprene

(C) Trans-1,4-polyisoprene

(D) Butyl rubber

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Chapter: [15] Polymers
Concept: Types of Polymerisation Reactions - Rubber

Which of the following is polyamide ?

(a) Teflon

(b) Nylon  6,6

(c) Terylene

(d) Bakelite

 

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Chapter: [15] Polymers
Concept: Introduction to Polymers >> Nylon 66

Write any ‘two’ uses of terylene.

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Chapter: [15] Introduction to Polymer Chemistry
Concept: Some Important Polymers

Write any ‘two’ uses of terylene.

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Chapter: [15] Polymers
Concept: Some Important Polymers

Write the reactions involved in the preparation of Orlon

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Chapter: [15] Polymers
Concept: Introduction to Polymers >> Preparation of Polyacrylonitrile
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