Science (English Medium) Class 12 - CBSE Important Questions

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

Which of the following is a more stable complex and why ?

Write the IUPAC name of the complex [Cr(NH₃)₄Cl₂]⁺. What type of isomerism does it exhibit?

In reference to Freundlich adsorption isotherm, write the expression for adsorption of gases on solids in the form of an equation.

Write an important characteristic of lyophilic sols.

Based on the type of particles of dispersed phase, give one example each of associated colloid and multimolecular colloid.

What is electrophoresis?

Write three differences between physisorption and chemisorption.

Differentiate between the following:

Adsorption and Absorption

Differentiate between the following:

Lyophobic Sol and Lyophilic Sol

Differentiate between the following:

Lyophobic Sol and Lyophilic Sol

Differentiate between the following:

Multimolecular Colloid and Macromolecular colloid

Why a negatively charged sol is obtained when AgNO₃ solution is added to KI solution?

What is a chelate complex?

Which isomer of C₅H₁₀ gives a single monochloro compound C₅H₉Cl in bright sunlight?

Draw the geometrical isomers of [Co(en)₂Cl₂]²⁺. Which geometrical isomer of [Co(en)₂Cl₂]²⁺ is not optically active and why?

Write the hybridisation and magnetic behaviour of [CoF₆]³⁻.

[Given: Atomic number of Co = 27]

Which of the following molecules has a chiral centre correctly labelled with an asterisk (*)?

The magnetic moment of [NiCl₄]²⁻ is ______.

[Atomic number: Ni = 28]

Which of the following species cannot act as a ligand? Give reason.