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

How do you convert the following :
Phenol to anisole

Define the following term:

Schottky defect

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

Account for the following :

Zr and Hf have almost similar atomic radii.

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

What type of stoichiometric defect is shown by NaCl ?

Write the equations involved in the following reactions : Williamson synthesis

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

Define the following term as related to proteins:

Primary structure

Name a member of the lanthanoid series which is well known to exhibit +4 oxidation state.

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

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”.

What are the different oxidation states exhibited by the lanthanoids?