List of top Questions asked in UP Board XII

What is Truck Farming?
Define Migration.
Which one of the following states has the highest density of population?
Which of the following is NOT an approach of Human Development?
In which of the following states are the major oil fields located?
In which of the following environments, one does not expect the presence of dispersed rural settlements?
Which one of the following is the most densely populated region?
Write the structural formula of benzaldehyde. Write chemical equations of the reactions of benzaldehyde with (i) NH$_2$NH$_2$
(ii) Tollen's reagent
(iii) HNO$_3$ and H$_2$SO$_4$
(iv) NaOH.
Write the IUPAC name of Acetaldehyde. Write its chemical equations with (i) NaHSO$_3$
(ii) NaOH
(iii) NH$_2$OH
(iv) CH$_3$OH in the presence of HCl gas.
Describe the laboratory method to prepare aniline and write the related chemical equation. Write also the equations of its two chemical properties and uses.
Write short notes on the following:
i) Carbylamine reaction
ii) Hofmann's bromamide reaction
iii) Acetylation
Prove that the time taken to complete 99.9% reaction is ten times the half-life period $(t_{1/2})$ for a first-order reaction.
Write down the method of preparation of phenol. Write chemical equations of the reaction of phenol with the following: (i) Conc. HNO$_3$ (ii) Bromine water (iii) Zinc
Write the chemical equation for the preparation of anisole. Write the chemical equations of its reactions with:
i) Acetyl chloride
ii) Hydrogen iodide
iii) Mixture of conc.\ H$_2$SO$_4$ and conc.\ HNO$_3$
Write the IUPAC names of the following coordinate compounds:
(i) [CrCl$_2$(en)]Cl
(ii) Cs[FeCl$_4$]
(iii) K$_3$[Co(C$_2$O$_4$)$_3$]
(iv) [CoCl$_3$(NH$_3$)$_3$]
What is electrode potential? Give the factors which affect the electrode potential of a metal.
Which elements are called transition elements? Explain: (i) Transition metals generally form coloured compounds, (ii) Transition metals or ions and many of their compounds show paramagnetic behaviour.
Write chemical equation for the formation of chlorobenzene by Sandmeyer reaction. How can the following compounds be obtained from chlorobenzene? Clarify giving chemical equations.
(i) Phenol
(ii) Toluene
(iii) Diphenyl
Write chemical equations of two methods of preparation of glucose. How will you obtain saccharic acid and gluconic acid from glucose?
Explain order and molecularity of a reaction giving example.
Write the structures of all possible isomers of alcohol having molecular formula C$_4$H$_{10$O.}
A solution of urea is 6% by mass. Calculate the mole fractions of urea and water in the solution. (Molecular mass of urea = 60).
Write the application of Grignard reagent.
Find the osmotic pressure of $\dfrac{M{10}$ urea solution at $27^\circ\mathrm{C}$ \ (Given: $R=0.0821$ L\,atm\,K$^{-1}$\,mol$^{-1}$).}
Explain Clemmensen reduction giving example.