List of top Questions asked in UP Board XII

The value of $x$ in the complex ion [Ni(CN)$_4$]$^x$ is –

In the reaction CH$_3$COCl + H$_2$ \xrightarrow{Pd-BaSO$_4$ .......... the product is –}

(CH$_3$)$_3$N is a –

Ascorbic acid is –

The amount of Na$_2$CO$_3$ to prepare 500 ml 0.2 M solution is –

Write short notes on the following:
(i) Carbylamine reaction
(ii) Hofmann's bromamide reaction
(iii) Schmidt reaction

Complete the following reactions and write the names and formulae of A, B, C, D and E.
i) \((\mathrm{HCOO})_2\mathrm{Ca}\ \xrightarrow[\text{Dry distillation}]{}\ (A)\ \xrightarrow[\text{NaOH}]{}\ (B) + \mathrm{CH_3OH}\)
ii) \((\mathrm{CH_3COO})_2\mathrm{Ca} + (\mathrm{HCOO})_2\mathrm{Ca}\ \xrightarrow[\text{Dry distillation}]{}\ (C)\ \xrightarrow[\ \mathrm{HCN}\ ]{}\ (D)\ \xrightarrow[\ \mathrm{H_2O}\ ]{}\ (E)\)

How will you obtain Ethylamine from the following? Write chemical equation only:
(i) Methyl cyanide
(ii) Propanamide
(iii) Acetamide
(iv) Nitroethane
(v) Ethyl isocyanate

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)$_6$]

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 short notes on the following:
(i) Williamson's synthesis
(ii) Gattermann reaction
(iii) Kolbe's reaction

Write short notes on the following:
i) Wurtz reaction
ii) Wurtz-Fittig reaction
iii) Fittig reaction

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

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 the colour of the following ions in aqueous solution: (i) Zn$^{2+$ (ii) Cu$^{2+}$ (iii) Fe$^{2+}$.}

Complete the following chemical equation: \(\; \mathrm{C_2H_5Br} \xrightarrow[\text{}]{\mathrm{KOH(aq)} (A) \xrightarrow[\Delta]{\mathrm{K_2Cr_2O_7,\;H_2SO_4}} (B)\).}

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$^{-1$.}

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

How will you convert ethanol into the following compounds? Write chemical equation only.
(i) 3-Hydroxybutanol (ii) But-2-enal

Write the definition of osmotic pressure. Calculate the osmotic pressure of 2% aqueous solution of urea at 27$^\circ$C. Solution constant $R = 0.082\ \text{L atm K^{-1}\ \text{mol}^{-1}$.}