Science (English Medium) Class 12 - CBSE Question Bank Solutions

Explain the following, giving two examples:

Coordination polyhedron

Explain the following, giving two examples:

Coordination number

Explain the following, giving two examples: 

Homoleptic

Explain the following, giving two examples: 

Heteroleptic

Give two examples of unidentate ligands.

What is meant by didentate ligand?

Give two examples of didentate ligands.

What is meant by ambidentate ligand?

Give two examples of ambidentate ligands.

Write the structure of the following organic halogen compound:

1,4-Dibromobut 2 ene

Write the IUPAC name of the following compound:

\[\begin{array}{cc}
\phantom{...............}\ce{CH3}\\
\phantom{.............}|\\
\ce{CH3 - CH - CH - C - CH3}\\
|\phantom{......}|\phantom{......}|\\
\phantom{...}\ce{CH3}\phantom{..}\ce{OH}\phantom{...}\ce{CH3}
\end{array}\]

Name the following halide according to the IUPAC system and classify it as alkyl, allyl, benzyl (primary, secondary, tertiary), vinyl or aryl halides:

\[\ce{CH3C(Cl)(C2H5)CH2CH3}\]

Name the following halide according to the IUPAC system and classify it as alkyl, allyl, benzyl (primary, secondary, tertiary), vinyl or aryl halides:

\[\ce{CH3CH2C(CH3)2CH2I}\]

Write the structure of the following compound:

1,4-Dibromobut-2-ene

Give the IUPAC name of the following compound:

\[\ce{(CCl3)3CCl}\]

What are interstitial compounds?

Write the differences between physisorption and chemisorption with respect to the following: 

(i) Specificity

(ii) Temperature dependence

(iii) Reversibility and

(iv) Enthalpy change

Which metal in the first transition series (3d series) exhibits + 1 oxidation state most frequently and why?

Which of the following cations are coloured in aqueous solutions and why ?

Sc³⁺, V³⁺, Ti⁴⁺, Mn²⁺ (At. Nos. Sc = 21, V = 23, Ti = 22, Mn = 25)

How would you account for the following? 

Transition metals exhibit variable oxidation states.