List of top Questions asked in UP Board XII- 2023

Explain the method of preparation of ozone gas by electric discharge method.
Reaction of NaNO\(_3\) and H\(_2\)SO\(_4\).
Phenol shows acidic character but ethanol remains approximately neutral. Why?
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$^{-1}$)
Write the formula of half-life period for first order reaction.
Silver forms ccp lattice. Edge length of its unit cell is 408.6 pm. Calculate the density of silver. (Atomic weight of Ag = 108)
In a first order reaction the concentration of a substance gets dissociated by 99% of the initial concentration in 100 minutes. Calculate the velocity constant of the reaction.
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.
State any four properties of d-block elements.
State anti-osmosis with example.
Differentiate between coordination compound and double salt.
Unit of specific conductance is:
Non-electrolyte is:
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.
Name one disaccharide and write its molecular formula.
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:
Discuss the mechanism of unimolecular and bimolecular nucleophilic substitution reactions in haloalkanes.
Explain why NH$_3$ is basic in nature.