List of top Questions asked in UP Board XII

Explain hybridisation on Ni in [Ni(CN)\(_4\)]\(^{2-}\).
Find oxidation number and coordination number of Fe in K\(_4\)[Fe(CN)\(_6\)].
Explain the following: (A) Conductance, (B) Cell constant.
Calculate the osmotic pressure of 5% aqueous urea solution (w/v) at 27$^\circ$C. Molecular weight of urea = 60. (R = 0.0821 L atm K$^{-1}$ mol$^{-1}$)
State any four properties of d-block elements.
Differentiate between coordination compound and double salt.
Unit of specific conductance is:
Non-electrolyte is:
State anti-osmosis with example.
Name one disaccharide and write its molecular formula.
State the name and formula of electrophile used in the nitration of benzaldehyde.
Write the names of two lyophilic and two lyophobic colloids.
State Hardy–Schulze law.
Structure of the crystal of sodium chloride is:
Molecular formula of sulphur at ordinary temperature is:
Gas present in food packet of substances is:
The charge on colloidal particles of Fe\(_2\)O\(_3 \cdot xH_2O\) is:
Write the mechanism of dehydration of ethanol.
Write short notes on the following: (A) Reimer–Tiemann Reaction
(B) Kolbe’s Reaction
(C) Williamson Ether Synthesis
Explain Werner’s postulates related to the bonding in coordination compounds.
Discuss the mechanism of unimolecular and bimolecular nucleophilic substitution reactions in haloalkanes.
Give reason that bleaching action of chlorine is permanent while that of SO$_2$ is temporary.
What happens when Sulphur dioxide reacts with acidic potassium permanganate? Write balanced chemical equation for this reaction.
Describe Ostwald’s process for the industrial manufacture of nitric acid. Write the balanced chemical equations of the following reactions: (i) Zinc metal reacts with conc. HNO$_3$
(ii) Iodine reacts with conc. HNO$_3$
Explain why NH$_3$ is basic in nature.