List of top Chemistry Questions asked in UP Board XII

Reaction of conc. HNO\(_3\) with I\(_2\).
Write balanced chemical equation of the reaction of ethanamine with NaNO\(_2\) + dil. HCl.
Write balanced chemical equation of the reaction of ethanamine with Hinsberg reagent.
Write I.U.P.A.C. name of CH\(_3\)CH\(_2\)OCH\(_2\)CH\(_2\)CH\(_3\).
What are tetrahedral voids?
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.
Phenol shows acidic character but ethanol remains approximately neutral. Why?
Silver forms ccp lattice. Edge length of its unit cell is 408.6 pm. Calculate the density of silver. (Atomic weight of Ag = 108)
Write the formula of half-life period for first order reaction.
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 the following: (A) Conductance, (B) Cell constant.
Explain hybridisation on Ni in [Ni(CN)\(_4\)]\(^{2-}\).
Find oxidation number and coordination number of Fe in K\(_4\)[Fe(CN)\(_6\)].
State anti-osmosis with example.
State the name and formula of electrophile used in the nitration of benzaldehyde.
Unit of specific conductance is:
Non-electrolyte is:
Differentiate between coordination compound and double salt.
Name one disaccharide and write its molecular formula.
Write the names of two lyophilic and two lyophobic colloids.
State Hardy–Schulze law.
The charge on colloidal particles of Fe\(_2\)O\(_3 \cdot xH_2O\) is:
Gas present in food packet of substances is:
Structure of the crystal of sodium chloride is: