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Karnataka Board PUCPUC Science 2nd PUC Class 12

PUC Science 2nd PUC Class 12 - Karnataka Board PUC Important Questions for Chemistry

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Chemistry
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Write the main product(s) in each of the following reactions:

Appears in 3 question papers
Chapter: [7] Alcohols, Phenols and Ethers
Concept: Chemical Reaction of Ethers - Cleavege of C-O Bonds

Write the main product(s) in each of the following reactions:

Appears in 3 question papers
Chapter: [7] Alcohols, Phenols and Ethers
Concept: Methods of Preparation of Alcohols

Write the main product(s) in each of the following reactions:

Appears in 3 question papers
Chapter: [7] Alcohols, Phenols and Ethers
Concept: Chemical Properties of Phenol

Account for the following :

Ozone is thermodynamically unstable.

Appears in 3 question papers
Chapter: [7] P - Block Elements
Concept: Group 16 Elements - The Oxygen Family >> Ozone

Account for the following : Solid PCl5 is ionic in nature.

Appears in 3 question papers
Chapter: [7] P - Block Elements
Concept: Group 15 Elements - The Nitrogen Family >> Phosphorus Halides

Account for the following:

Fluorine forms only one oxoacid HOF.

Appears in 3 question papers
Chapter: [7] P - Block Elements
Concept: Group 17 Elements - The Halogen Family >> Oxoacids of Halogens

Draw the structure of BrF5

Appears in 3 question papers
Chapter: [7] P - Block Elements
Concept: Group 17 Elements - The Halogen Family >> Interhalogen Compounds

Compare the oxidizing action of F2 and Cl2 by considering parameters such as bond dissociation enthalpy, electron gain enthalpy and hydration enthalpy.

Appears in 3 question papers
Chapter: [7] P - Block Elements
Concept: Group 17 Elements - The Halogen Family

Write the conditions to maximize the yield of H2SO4 by contact process.

Appears in 3 question papers
Chapter: [7] P - Block Elements
Concept: Group 16 Elements - The Oxygen Family >> Sulphuric Acid

Write the structures of A, B, C, D and E in the following reactions:

Appears in 3 question papers
Chapter: [7] Alcohols, Phenols and Ethers
Concept: Chemical Properties of Phenol

What is the basicity of H3PO4?

Appears in 3 question papers
Chapter: [7] P - Block Elements
Concept: Group 15 Elements - The Nitrogen Family >> Oxoacids of Phosphorus

Name the reagents used in the following reactions:

Appears in 3 question papers
Chapter: [7] Alcohols, Phenols and Ethers
Concept: Methods of Preparation of Alcohols

How do you convert the following : Propan-2-ol to 2-methylpropan-2-ol

Appears in 3 question papers
Chapter: [7] Alcohols, Phenols and Ethers
Concept: Methods of Preparation of Alcohols

Write the mechanism of the following reaction :

Appears in 3 question papers
Chapter: [7] Alcohols, Phenols and Ethers
Concept: Chemical Reactions of Alcohols and Phenols >> Reactions Involving Cleavage of Carbon–Oxygen (C–O) Bond in Alcohols

Write the equation involved in the acetylation of Salicylic acid.

Appears in 3 question papers
Chapter: [7] Alcohols, Phenols and Ethers
Concept: Chemical Reactions of Alcohols and Phenols >> Reactions Involving Cleavage of O-H Bond

Account for the following :

Acidic character increases from HF to HI.

Appears in 3 question papers
Chapter: [7] P - Block Elements
Concept: Group 17 Elements - The Halogen Family

Account for the following : There is large difference between the melting and boiling points of oxygen and sulphur.

Appears in 3 question papers
Chapter: [7] P - Block Elements
Concept: Group 16 Elements - The Oxygen Family

Draw the structures of the following : ClF3

Appears in 3 question papers
Chapter: [7] P - Block Elements
Concept: Group 17 Elements - The Halogen Family >> Interhalogen Compounds

Which allotrope of phosphorus is more reactive and why?

Appears in 3 question papers
Chapter: [7] P - Block Elements
Concept: Group 15 Elements - The Nitrogen Family >> Phosphorus - Allotropic Forms

How the supersonic jet aeroplanes are responsible for the depletion of ozone layers?

Appears in 3 question papers
Chapter: [7] P - Block Elements
Concept: Group 16 Elements - The Oxygen Family >> Ozone
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