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Science (English Medium) इयत्ता १२ - CBSE Important Questions for Chemistry

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

Appears in 1 question paper
Chapter: [7] P - Block Elements
Concept: Concept of Group 15 Elements

which poisonous gas is evolved when white phosphorus is heated with conc. NaOH solution? Write the chemical equation involved.

Appears in 1 question paper
Chapter: [7] P - Block Elements
Concept: p-Block elements of Group 15 Elements >> Phosphine

Which noble gas has the lowest boiling point?

Appears in 1 question paper
Chapter: [7] P - Block Elements
Concept: P - Block Group 18 Elements >> Concept of Group 18 Elements

Fluorine is a stronger oxidising agent than chlorine. Why?

Appears in 1 question paper
Chapter: [7] P - Block Elements
Concept: Concept of Group 17 Elements

Complete the equation

PbS + O3

Appears in 1 question paper
Chapter: [7] P - Block Elements
Concept: P - Block Group 16 Elements >> Ozone

What is the basicity of H3PO3 ?

Appears in 1 question paper
Chapter: [7] P - Block Elements
Concept: p-Block elements of Group 15 Elements >> Oxoacids of Phosphorus

Complete the following equations : P4 + H2O →

Appears in 1 question paper
Chapter: [7] P - Block Elements
Concept: p-Block elements of Group 15 Elements >> Oxoacids of Phosphorus

Complete the following equations : XeF4 + O2F2

Appears in 1 question paper
Chapter: [7] P - Block Elements
Concept: P - Block Group 18 Elements >> Concept of Group 18 Elements

Draw the structures of the following molecules: H2S2O8

Appears in 1 question paper
Chapter: [7] P - Block Elements
Concept: P - Block Group 16 Elements >> Oxoacids of Sulphur

Why does NO2 dimerise?

Appears in 1 question paper
Chapter: [7] P - Block Elements
Concept: p-Block elements of Group 15 Elements >> Oxides of Nitrogen

Complete the following equations: Ag+PCl5 

Appears in 1 question paper
Chapter: [7] P - Block Elements
Concept: p-Block elements of Group 15 Elements >> Phosphorus Halides

Complete the following equations: CaF2+H2SO4 

Appears in 1 question paper
Chapter: [7] P - Block Elements
Concept: P - Block Group 16 Elements >> Sulphuric Acid

Complete the following equations: C + conc. H2SO4

Appears in 1 question paper
Chapter: [7] P - Block Elements
Concept: P - Block Group 16 Elements >> Sulphuric Acid

Draw the structure of the following:

XeO3

Appears in 1 question paper
Chapter: [7] P - Block Elements
Concept: P - Block Group 18 Elements >> Concept of Group 18 Elements

Write the equation involved in the following reaction:

Kolbe’s reaction

Appears in 1 question paper
Chapter: [7] Alcohols, Phenols and Ethers
Concept: Chemical Properties of Phenol

Write the structure of 3-Bromo-2-methylprop-1-ene

Appears in 1 question paper
Chapter: [7] Alcohols, Phenols and Ethers
Concept: Preparation of Ethers

Write IUPAC name of the following compound (CH3)2 N − CH2CH3

Appears in 1 question paper
Chapter: [7] Alcohols, Phenols and Ethers
Concept: Alcohols, Phenols and Ethers >> Nomenclature

Complete the given chemical equations:

`2XeF_2 + 2H_2O->`

Appears in 1 question paper
Chapter: [7] P - Block Elements
Concept: P - Block Group 18 Elements >> Concept of Group 18 Elements

Draw the structures of `H_3PO_2`

 

Appears in 1 question paper
Chapter: [7] P - Block Elements
Concept: Concept of Group 16 Elements

Complete chemical reactions are:Cl2 + H2O →

Appears in 1 question paper
Chapter: [7] P - Block Elements
Concept: Concept of Group 17 Elements
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CBSE Science (English Medium) इयत्ता १२ Important Questions
Important Questions for CBSE Science (English Medium) इयत्ता १२ Biology
Important Questions for CBSE Science (English Medium) इयत्ता १२ Chemistry
Important Questions for CBSE Science (English Medium) इयत्ता १२ Computer Science (C++)
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Important Questions for CBSE Science (English Medium) इयत्ता १२ English Core
Important Questions for CBSE Science (English Medium) इयत्ता १२ English Elective - NCERT
Important Questions for CBSE Science (English Medium) इयत्ता १२ Entrepreneurship
Important Questions for CBSE Science (English Medium) इयत्ता १२ Geography
Important Questions for CBSE Science (English Medium) इयत्ता १२ Hindi (Core)
Important Questions for CBSE Science (English Medium) इयत्ता १२ Hindi (Elective)
Important Questions for CBSE Science (English Medium) इयत्ता १२ History
Important Questions for CBSE Science (English Medium) इयत्ता १२ Informatics Practices
Important Questions for CBSE Science (English Medium) इयत्ता १२ Mathematics
Important Questions for CBSE Science (English Medium) इयत्ता १२ Physical Education
Important Questions for CBSE Science (English Medium) इयत्ता १२ Physics
Important Questions for CBSE Science (English Medium) इयत्ता १२ Political Science
Important Questions for CBSE Science (English Medium) इयत्ता १२ Psychology
Important Questions for CBSE Science (English Medium) इयत्ता १२ Sociology
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