List of top Chemistry Questions asked in COMEDK UGET

A newly prepared radioactive nuclide has a decay constant of 6.93 s\(^{-1}\). What is the half-life of the nuclide?
Which of the following artificial sweeteners can be used in soft drinks only?
The equilibrium constant, \(K_C\) for \(3C_2H_2(g) \rightleftharpoons C_6H_6(g)\) is 4 L\(^2\)mol\(^{-2}\). If the equilibrium concentration of benzene is 0.5 mol/L, then what is the value of concentration of ethylene?
Which of the product is not possible in Wurtz reaction?
Minimum number of nodes are present in
The spectrum of He\(^+\) is similar to
The relation between work done in reversible and irreversible process is
In which of the following changes, entropy decreases?
The correct condition for physical adsorption is
Barbiturates are used to treat
Which of the following is a false statement?
The oxidation state of nickel in [Ni(CO)_4] is
Which of the following statement is incorrect for \( \mathrm{H_2O_2} \) structure?
Which of the following compounds does not exist?
Which among the following will not liberate nitrogen on reaction with nitrous acid?
Which of the following is used to prepare the inner lining of a blast furnace?
Which of the following statement is incorrect about activation energy? Higher the activation energy slower is the rate of reaction.
For the reaction \( 2 N_2O_5 \rightarrow 4 NO_2 + O_2 \). If initial pressure is 100 atm and rate constant \( k \) is \( 3.38 \times 10^{-5} \, \text{s}^{-1} \), After 20 min the final pressure of \( N_2O_5 \) will be:
Increasing order of bond order of oxygen and its ions is
Which of the following does not affect solubility of a gas in liquid?
The difference between heat capacity at constant pressure and heat capacity at constant volume is
What will be the density of \( N_2 \) gas at 230°C and 3 atm pressure? (Given \( R = 0.082 \, \text{L atm} \, \text{mol}^{-1} \, \text{K}^{-1} \))
Which among the following forms minimum boiling azeotropes?
(i) Heptane + Octane
(ii) Water + Nitric acid
(iii) Ethanol + Water
(iv) Acetone + Carbon dioxide
The solution which has the lowest freezing point is
Calculate the molar conductance of 0.025M aqueous solution of calcium chloride at 25°C. The specific conductance of calcium chloride is \( 12.04 \times 10^{-2} \, \text{S} \, \text{m}^{-1} \)