List of top Chemistry Questions asked in UP Board XII

Which of 0.1 M urea and 0.1 M NaCl will have more osmotic pressure? Explain with reason.
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?
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$^{-1}$)
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)
Explain the following: (A) Conductance, (B) Cell constant.
Write the formula of half-life period for first order reaction.
Explain hybridisation on Ni in [Ni(CN)\(_4\)]\(^{2-}\).
Find oxidation number and coordination number of Fe in K\(_4\)[Fe(CN)\(_6\)].
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.
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.
State anti-osmosis with example.
Unit of specific conductance is:
Non-electrolyte is:
Differentiate between coordination compound and double salt.
The charge on colloidal particles of Fe\(_2\)O\(_3 \cdot xH_2O\) is:
Structure of the crystal of sodium chloride is:
Molecular formula of sulphur at ordinary temperature is: