List of top Chemistry Questions

O\(_2^{−}\), F\(^−\), Mg\(^{2+}\), Al\(^{3+}\), O\(_2\), F\(_2\). How many of the species given above are isoelectronic?
The essential amino acid are
(i) Leucine
(ii) Glutamic acid
(iii) Asparagine
(iv) Valine
Choose the correct option from the following:
What is the function of platelets?
pH of \(10^{-3}\) M solution of KOH is
In which of the following changes, entropy decreases?
What will be the density of \( N_2 \) gas at 230°C and 3 atm pressure? (Given \( R = 0.082 \, \text{L atm} \, \text{mol}^{-1} \, \text{K}^{-1} \))
Minimum number of nodes are present in
The spectrum of He\(^+\) is similar to
Which of the following is used to prepare the inner lining of a blast furnace?
Find the product formed for the given reaction.
\[ C_6H_5CHO + H_3C-CH_2CHO \xrightarrow{\text{Dil. NaOH/Δ}} \text{Product} \]
Which of the following gases is responsible for acid rain?
Which of the following is a false statement?
Calculate the molar conductance of 0.025M aqueous solution of calcium chloride at 25°C. The specific conductance of calcium chloride is \( 12.04 \times 10^{-2} \, \text{S} \, \text{m}^{-1} \)
Which of the following compounds does not exist?
Which among the following will not liberate nitrogen on reaction with nitrous acid?
The Paschen series of hydrogen spectrum lies in which region?
The difference between heat capacity at constant pressure and heat capacity at constant volume is
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:
Which of the following statement is incorrect for \( \mathrm{H_2O_2} \) structure?
Which of the following does not affect solubility of a gas in liquid?
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
The correct condition for physical adsorption is
The relation between work done in reversible and irreversible process is