Science (English Medium) Class 12 - CBSE Important Questions

How is the variability in oxidation states of transition metals different from that of p-block elements?

Assertion (A) : Copper is a non-transition element.

Reason (R) : Copper has completely filled d-orbitals in its ground state.

Which of the following characteristics of transition metals is associated with their catalytic activity?

When a coordination compound CoCl₃.6NH₃ is mixed with AgNO₃, 3 moles of AgCl are precipitated per mole of the compound. Write the structural formula of the coordination compound.

Draw the geometrical isomers of complex \[\ce{[Co(en)2Cl2]+}\].

Write the dispersed phase and dispersion medium of butter.

Write the hybridization and shape of the following complexe : [CoF₆]^3–

(Atomic number : Co = 27, Ni = 28)

Write the hybridization and shape of the following complexe : [Ni(CN)₄]^2–

^{(Atomic number : Co = 27, Ni = 28)}

Define the following term : Brownian movement

Define the following term:

Multimolecular colloids

Define the following term:

Multimolecular colloids

What are the dispersed phase and dispersion medium in milk?

Write one difference in Lyophobic sol and Lyophilic sol

Write one difference in Lyophobic sol and Lyophilic sol

Answer the following question.
Why are medicines more effective in the colloidal state?

Answer the following question.
What is the difference between an emulsion and a gel?

Using crystal field theory, write the electronic configuration of d⁵ ion, if Δ₀ > P.

What is the spectrochemical series?

What is the difference between a weak field ligand and a strong field ligand?

State the Hardy-Schulze rule.