List of top Chemistry Questions asked in UP Board XII

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

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

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

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

How many primary amines are possible for the formula C$_4$H$_{11$N?}

Which compound of the following does \(\underline{not}\) reduce Fehling's solution?

Deficiency of which vitamin causes scurvy?

Total how many ions are there in [Co(NH$_3$)$_5$Cl]Cl$_2$ solution?

100 ml of 10 M HCl is mixed with 75 ml of 10 M Na$_2$CO$_3$. The resulting solution would be –

Number of unpaired electrons in Cu$^{2+$ (Z = 29) is –}

Write the formula of the following coordination compounds:
(i) Hexa aqua chromium (III) chloride
(ii) Dichlorido diammin e platinum (II)
(iii) Hexa ammine platinum (IV) chloride
(iv) Sodium penta cyano nitrosyl ferrate (II)

Write chemical equations for obtaining the following from phenol:
(i) 4-Nitrophenol
(ii) Picric acid
(iii) 4-Bromophenol
(iv) Salicylaldehyde
(v) Benzoquinone

Write unit of first order reaction. The initial concentration of N$_2$O$_5$ at 318 K was $0.60\times 10^{-2$ mol L$^{-1}$ in the first order reaction, which became $0.20\times 10^{-2}$ mol L$^{-1}$ after 60 min. Calculate the velocity constant at 318 K. (log 3 = 0.4771).}