List of top Chemistry Questions asked in UP Board XII

How will you convert (Write chemical equation only):
(i) Propene into propan-2-ol (ii) Benzyl chloride into benzyl alcohol (iii) Phenol into 2,4,6-tribromophenol (iv) Phenol into picric acid (v) Salicylic acid into phenol
Write short notes on the following:
i) Wurtz reaction
ii) Wurtz-Fittig reaction
iii) Fittig reaction
Write short notes on the following:
(i) Williamson's synthesis
(ii) Gattermann reaction
(iii) Kolbe's reaction
Complete the following equations:
(i)\; \(\mathrm{CH_3CHO} \xrightarrow{\;CH_3MgBr\;} (A) \xrightarrow{\;(B)\;} CH_3\!-\!CHOH\!-\!CH_3 \xrightarrow[\ \Delta\ ]{\;K_2Cr_2O_7/H_2SO_4\;} (C) \xrightarrow[\ \Delta\ ]{\;NH_2OH\;} (D)\)
(ii)\; \(\mathrm{C_6H_5CN + H_2O \xrightarrow{\;dil.\ H_2SO_4\;} (E)}\)
Write IUPAC names of the following:
(i) K$_3$[AlF$_6$]
(ii) [Fe(H$_2$O)$_6$]Cl$_2$
(iii) [Co(NH$_3$)$_5$Cl]SO$_4$
(iv) K$_3$[Fe(CN)$_6$]
Write chemical equations of the reactions of formation of $n$-hexane, pentaacetyl glucose, glucose cyanohydrin and gluconic acid from glucose.
What happens when (Write chemical equation only):
(i) Silver propionate reacts with Br$_2$ in CCl$_4$:
(ii) Bromobenzene reacts with Mg in the presence of dry ether:
(iii) Methyl bromide reacts with KCN (alc.):
(iv) Ethyl bromide is heated with sodium ethoxide:
(v) Ethyl bromide reacts with silver acetate:
Write the colour of the following ions in aqueous solution: (i) Zn$^{2+$ (ii) Cu$^{2+}$ (iii) Fe$^{2+}$.}
What is electrode potential? Mention the factors affecting it.
Explain with example the difference between molecularity and order of reaction.
Explain Faraday's laws of electrolysis.
How will you convert ethanol into the following compounds? Write chemical equation only.
(i) 3-Hydroxybutanol (ii) But-2-enal
Ketones do not reduce Fehling's solution and Tollen's reagent while fructose containing ketonic group does. Why?
6 g urea is dissolved in 200 g water. Calculate the elevation in boiling point. Molal elevation constant for water is 0.52 K kg mol$^{-1$.}
Decomposition of NH$_3$ on the surface of platinum is a zero–order reaction. What will be the rate of formation of N$_2$ and H$_2$? \; (Given: $k=2.5\times10^{-4}\ \mathrm{mol\,L^{-1}\,s^{-1}}$)
Write the names of the reagents used in the following reactions:
i) Conversion of benzyl alcohol into benzoic acid
ii) Formation of butan-2-ol from butan-2-one
Complete the following chemical equation: \(\; \mathrm{C_2H_5Br} \xrightarrow[\text{}]{\mathrm{KOH(aq)} (A) \xrightarrow[\Delta]{\mathrm{K_2Cr_2O_7,\;H_2SO_4}} (B)\).}
Write the definition of osmotic pressure. Calculate the osmotic pressure of 2% aqueous solution of urea at 27$^\circ$C. Solution constant $R = 0.082\ \text{L atm K^{-1}\ \text{mol}^{-1}$.}
How many primary amines are possible for the formula C$_4$H$_{11$N?}
Aqueous solutions of HgCl$_2$ and SnCl$_2$ cannot co-exist, why?
Which compound of the following does \(\underline{not}\) reduce Fehling's solution?
Prove with example that [Co(NH$_3$)$_5$Cl]SO$_4$ and [Co(NH$_3$)$_5$SO$_4$]Cl are ionisation isomers.
What is the relation between elevation in boiling point and molality?
Deficiency of which vitamin causes scurvy?
Total how many ions are there in [Co(NH$_3$)$_5$Cl]Cl$_2$ solution?