Department of Pre-University Education, KarnatakaPUC Karnataka Science Class 12
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Question Bank Solutions for PUC Karnataka Science Class 12 - Department of Pre-University Education, Karnataka - Chemistry

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Out of C and CO, which is a better reducing agent at the lower temperature range in the blast furnace to extract iron from the oxide ore?

[6] General Principles and Processes of Isolation of Elements
Chapter: [6] General Principles and Processes of Isolation of Elements
Concept: Occurrence of Metals

Write the names and structure of the monomers of the following polymers: Buna − S

[15] Polymers
Chapter: [15] Polymers
Concept: Introduction of Polymers

What use of drugs is used in sleeping pills?

[16] Chemistry in Everyday Life
Chapter: [16] Chemistry in Everyday Life
Concept: Drugs and Their Classification

How do you convert: Chlorobenzene to biphenyl

[10] Haloalkanes and Haloarenes
Chapter: [10] Haloalkanes and Haloarenes
Concept: Introduction of Haloalkanes and Haloarenes

What is the role of cryolite in the extraction of aluminium?

[6] General Principles and Processes of Isolation of Elements
Chapter: [6] General Principles and Processes of Isolation of Elements
Concept: Occurrence of Metals

What is the role of limestone in the extraction of iron from its oxides?

[6] General Principles and Processes of Isolation of Elements
Chapter: [6] General Principles and Processes of Isolation of Elements
Concept: Occurrence of Metals

Nitrogen does not form pentahalide.

[7] P - Block Elements
Chapter: [7] P - Block Elements
Concept: Concept of Group 15 Elements

Identify the monomers in the following polymer:

[15] Polymers
Chapter: [15] Polymers
Concept: Introduction of Polymers

Arrange the following polymers in the Increasing order of their intermolecular forces:

Terylene, Polythene, Neoprene

[15] Polymers
Chapter: [15] Polymers
Concept: Introduction of Polymers

Due to hectic and busy schedule, Mr Angad made his life full of tensions and anxiety. He started taking sleeping pills to overcome the depression without consulting the doctor. Mr Deepak, a close friend of Mr. Angad advised him to stop taking sleeping pills and suggested to change his life lifestyle by doing yoga, meditation and some physical exercise. Mr. Angad followed his friend’s advice and after few days he started feeling better.

After reading the above passage, answer the following

(i) What are the values (at least two) displayed by Mr. Deepak?

(ii) Why is it not advisable to take sleeping pills without consulting doctor?

(iii) What are tranquilisers? Give two examples.

[16] Chemistry in Everyday Life
Chapter: [16] Chemistry in Everyday Life
Concept: Drugs and Their Classification

Write two differences between an ideal solution and a non-ideal solution.

[2] Solutions
Chapter: [2] Solutions
Concept: Types of Solutions

What is the role of CO in the extraction of Iron?

[6] General Principles and Processes of Isolation of Elements
Chapter: [6] General Principles and Processes of Isolation of Elements
Concept: Occurrence of Metals

Write the names and structures of the monomers of the following polymers: Nylon-6

[15] Polymers
Chapter: [15] Polymers
Concept: Introduction of Polymers

Write the names and structures of the monomers of the following polymers: Novolac

[15] Polymers
Chapter: [15] Polymers
Concept: Introduction of Polymers

What is rate of reaction?

[4] Chemical Kinetics
Chapter: [4] Chemical Kinetics
Concept: Rate of a Chemical Reaction

Account for the following:

N2 is less reactive at room temperature.

[7] P - Block Elements
Chapter: [7] P - Block Elements
Concept: Concept of Group 15 Elements

Account for the following: Reducing character increases from NH3 to BiH3.

[7] P - Block Elements
Chapter: [7] P - Block Elements
Concept: Concept of Group 15 Elements

In the extraction of Al, impure Al2O3 is dissolved in conc. NaOH to form sodium aluminate and leaving impurities behind. What is the name of this process?

[6] General Principles and Processes of Isolation of Elements
Chapter: [6] General Principles and Processes of Isolation of Elements
Concept: Occurrence of Metals

What is the role of coke in the extraction of iron from its oxides?

[6] General Principles and Processes of Isolation of Elements
Chapter: [6] General Principles and Processes of Isolation of Elements
Concept: Occurrence of Metals

Identify the monomers in the following polymer:

[15] Polymers
Chapter: [15] Polymers
Concept: Introduction of Polymers
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Question Bank Solutions for PUC Karnataka Science Class 12 Department of Pre-University Education, Karnataka Chemistry. You can further filter Question Bank Solutions by subjects and topics. Solutions for most of the questions for Department of Pre-University Education, Karnataka can be found here on Shaalaa.com. You can use these solutions to prepare for your studies and ace in exams. Solving questions is a great way to practice and with Shaalaa.com, you can answer a question and then also check your answer with the solutions provided.
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