List of top Chemistry Questions asked in COMEDK UGET

Which of the following compounds does not exist?
The P – O bond order in \( \text{PO}_4^{3-} \) is
What will be the density of \( N_2 \) gas at 230°C and 3 atm pressure? (Given \( R = 0.082 \, \text{L atm} \, \text{mol}^{-1} \, \text{K}^{-1} \))
The monosaccharides of maltose is
On treatment of glucose with bromine water the product formed is
Which of the following vitamin is responsible for beri-beri disease?
How many atoms are present in hcp per unit cell?
What can be A and B in the following reaction?
The difference between heat capacity at constant pressure and heat capacity at constant volume is
The relation between work done in reversible and irreversible process is
Which of the product is not possible in Wurtz reaction?
Which of the following is added to soaps to impart antiseptic properties?
Which of the following show both Frenkel and Schottky defect?
Increasing order of bond order of oxygen and its ions is
Which of the following molecules does not exhibit dipole moment?
(i) CCl$_4$
(ii) CO$_2$
(iii) NH$_3$
(iv) CHCl$_3$
(v) H$_2$O
(vi) CH$_3$–O–CH$_3$
What will be the emf of the following cell at 25°C?
\[ \text{Fe} \, / \, \text{Fe}^{2+}(0.001M) \, || \, \text{H}^{+}(0.01M) \, | \, \text{H}_2(g) \, (1 \, \text{Bar}) \, | \, \text{Pt}(s) \] Given: \[ E_{\text{Fe}^{2+} / \text{Fe}}^\circ = -0.44V, \quad E_{\text{H}^{+} / \text{H}_2}^\circ = 0.00V \]
Which of the following statement is incorrect for \( \mathrm{H_2O_2} \) structure?
O\(_2^{−}\), F\(^−\), Mg\(^{2+}\), Al\(^{3+}\), O\(_2\), F\(_2\). How many of the species given above are isoelectronic?
The system that forms maximum boiling azeotropes is
Doping of silicon (Si) with indium (In) leads to the formation of
For the reaction, H$_2$(g) + I$_2$(g) ⇌ 2 HI(g), the position of equilibrium can be shifted to the right by
The process of aggregation of colloidal particles into an insoluble precipitate by the addition of suitable electrolyte is called
Give the correct order of acidity of
Alkyl halides undergoing \( S_N2 \) reaction do inverse
............. is unstable at cooking temperature, whereas the control of sweetness of food is difficult while using ..........