List of top Questions asked in UP Board XII

When did Madho Swaroop Vatsa begin excavations at Harappa ?
78 CE is related to
Why is chlorine atom of chlorobenzene less reactive than chlorine atom of chloroethane? Write chemical equations of reactions of chlorobenzene with (A) Cl$_2$ and (B) conc. H$_2$SO$_4$.
Write short notes on the following:
(A) Electrophilic substitution in halobenzene,
(B) Wurtz–Fittig reaction,
(C) Applications of Grignard’s reagent.
Write the structural formula and I.U.P.A.C. name of D-glucose. How will you prove the presence of aldehyde group in glucose molecule?
Denaturation of protein.
Zwitter ion.
Uses of protein.
Write the reaction of ozone with lead sulphide.
Write the reaction between NO (g) and O\(_3\) (g).
Write the structural formula of benzaldehyde. Write chemical equations of the reaction of benzaldehyde with (A) NH$_2$NH$_2$, (B) Tollen’s reagent and (C) NaOH.
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 conc. HNO\(_3\) with I\(_2\).
Reaction of nitric acid and zinc.
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?
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.