PUC Science 2nd PUC Class 12 - Karnataka Board PUC Question Bank Solutions for Chemistry

On the basis of crystal field theory, write the electronic configuration for d⁴ ion if ∆₀ < P.

Amino acids show amphoteric behaviour. Why?

Define the following term

Schottky defect

What type of battery is mercury cell? Why is it more advantageous than dry cell?

What type of non-stoichiometric point defect is responsible for the pink colour of LiCl ?

What type of stoichiometric defect is shown by NaCl ?

Name the type of cell which was used in Apollo space programme for providing electrical power.

Write the chemical equations to illustrate the following name reaction: 

Cannizzaro’s reaction

Which stoichiometric defect does not change the density of the crystal?

Define terms: Fuel cell

Which stoichiometric defect decreases the density of the crystal?

Define the following terms: Secondary batteries

Define the following term:

Essential amino acids

What type of defect can arise when a solid is heated? Which physical property is affected by it and in what way?

What type of stoichiometric defect is shown by:

(i) ZnS 

(ii) AgBr

Vapour pressure of water at 293 K is 17.535 mm Hg. Calculate the vapour pressure of water at 293 K when 25 g of glucose is dissolved in 450 g of water.

In the button cells widely used in watches and other devices, the following reaction takes place:

\[\ce{Zn_{(s)} + Ag2O_{(s)} + H2O_{(l)} -> Zn{^{2+}_{(aq)}} + 2Ag_{(s)} + 2OH^-_{ (aq)}}\]

Determine Δ_rG° and E° for the reaction.

Comment on the statement that “colloid is not a substance but a state of substance”.

The hexaquo manganese (II) ion contains five unpaired electrons, while the hexacyanoion contains only one unpaired electron. Explain using Crystal Field Theory.

Draw figure to show the splitting of d orbitals in an octahedral crystal field.