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Science (English Medium) Class 12 - CBSE Important Questions for Chemistry

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Chemistry
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Write the IUPAC name of the given compound:

Appears in 3 question papers
Chapter: [5] Coordination Compounds
Concept: Nomenclature of Coordination Compounds - Naming of Mononuclear Coordination Compounds

When a co-ordination compound CrCl3.6H2O is mixed with AgNO3, 2 moles of AgCl are precipitated per mole of the compound. Write

(i) Structural formula of the complex.

(ii) IUPAC name of the complex.

Appears in 3 question papers
Chapter: [5] Coordination Compounds
Concept: Nomenclature of Coordination Compounds - Naming of Mononuclear Coordination Compounds

Differentiate between adsorbtion and absorption.

Appears in 3 question papers
Chapter: [5] Surface Chemistry
Concept: Types of Adsorption

Out of MgCl2 and AlCl3, which one is more effective in causing coagulation of negatively charged sol and why?

Appears in 3 question papers
Chapter: [5] Surface Chemistry
Concept: Properties of Colloidal Solutions

Out of sulphur sol and proteins, which one form multimolecular colloids?

Appears in 3 question papers
Chapter: [5] Surface Chemistry
Concept: Classification of Colloids >> Classification Based on Nature of Interaction Between Dispersed Phase and Dispersion Medium

For the complex [Fe(CN)6]3–, write the hybridization type, magnetic character and spin nature of the complex. (At. number : Fe = 26).

Appears in 3 question papers
Chapter: [5] Coordination Compounds
Concept: Bonding in Coordination Compounds >> Magnetic Properties of Coordination Compounds

Draw one of the geometrical isomers of the complex [Pt(en)2Cl2]2+ which is optically active.

Appears in 3 question papers
Chapter: [5] Coordination Compounds
Concept: Isomerism in Coordination Compounds >> Stereoisomerism

Write the IUPAC name of the given compound :

Appears in 3 question papers
Chapter: [5] Coordination Compounds
Concept: Nomenclature of Coordination Compounds - Naming of Mononuclear Coordination Compounds

Out of BaCl2 and KCl, which one is more effective in causing coagulation of a negatively charged colloidal Sol? Give reason.

Appears in 3 question papers
Chapter: [5] Surface Chemistry
Concept: Properties of Colloidal Solutions

Write down the IUPAC name of the following complex: [Cr(NH3)2Cl2(en)]Cl (en = ethylenediamine)

Appears in 3 question papers
Chapter: [5] Coordination Compounds
Concept: Nomenclature of Coordination Compounds - Naming of Mononuclear Coordination Compounds

Write the formula for the following complex:

Pentaamminenitrito-O-Cobalt(III)

Appears in 3 question papers
Chapter: [5] Coordination Compounds
Concept: Nomenclature of Coordination Compounds - Formulas of Mononuclear Coordination Entities

Draw the geometrical isomers of complex [Pt(NH3)2Cl2].

Appears in 3 question papers
Chapter: [5] Coordination Compounds
Concept: Isomerism in Coordination Compounds >> Stereoisomerism

Write the hybridization and magnetic behaviour of the complex [Ni(CO)4].

(At.no. of Ni = 28)

Appears in 3 question papers
Chapter: [5] Coordination Compounds
Concept: Bonding in Coordination Compounds >> Magnetic Properties of Coordination Compounds

Give reasons for the following observations: Leather gets hardened after tanning.

Appears in 3 question papers
Chapter: [5] Surface Chemistry
Concept: Properties of Colloidal Solutions

Give reasons for the following observations: Lyophilic sol is more stable than lyophobic sol. 

Appears in 3 question papers
Chapter: [5] Surface Chemistry
Concept: Classification of Colloids >> Classification Based on Nature of Interaction Between Dispersed Phase and Dispersion Medium

It is necessary to remove CO when ammonia is prepared by Haber's process.

Appears in 3 question papers
Chapter: [5] Surface Chemistry
Concept: Catalysis >> Enzyme Catalysis

What are emulsions?

Appears in 3 question papers
Chapter: [5] Surface Chemistry
Concept: Emulsions

What are the different types of emulsions? Give one example of each type.

Appears in 3 question papers
Chapter: [5] Surface Chemistry
Concept: Emulsions

Write the IUPAC name of the complex [Cr(NH3)4 Cl2]Cl.

Appears in 3 question papers
Chapter: [5] Coordination Compounds
Concept: Nomenclature of Coordination Compounds - Naming of Mononuclear Coordination Compounds

What type of isomerism is exhibited by the complex [Co(en)3]3+?

(en = ethane-1,2-diamine)

Appears in 3 question papers
Chapter: [5] Coordination Compounds
Concept: Isomerism in Coordination Compounds >> Stereoisomerism
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