List of top Chemistry Questions asked in UP Board XII

Write I.U.P.A.C. name of Acetaldehyde. Write chemical equations of its reaction with (A) NaHSO$_3$, (B) NaOH, (C) NH$_2$NH$_2$, and (D) HCN.
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?
Which of 0.1 M urea and 0.1 M NaCl will have more osmotic pressure? Explain with reason.
Reaction of NaNO\(_3\) and H\(_2\)SO\(_4\).
Explain the method of preparation of ozone gas by electric discharge method.
Reaction of nitric acid and zinc.
Reaction of conc. HNO\(_3\) with I\(_2\).
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 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.
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$^{-1}$)
Differentiate between coordination compound and double salt.
Unit of specific conductance is:
Non-electrolyte is:
Name one disaccharide and write its molecular formula.
Write the names of two lyophilic and two lyophobic colloids.
State Hardy–Schulze law.