List of top Chemistry Questions

In potash alum, the ratio of \(\text{K}^+\) and \(\text{SO}_4^{2-}\) ions is
The standard electrode potential (\(E^\circ\)) for the half-cell reaction \(\text{Fe}^{3+} + e^- \rightarrow \text{Fe}^{2+}\) at \(298\text{ K}\) is (Given: \(E^\circ(\text{Fe}^{3+}/\text{Fe}) = -0.04\text{ V}\) and \(E^\circ(\text{Fe}^{2+}/\text{Fe}) = -0.44\text{ V}\) at \(298\text{ K}\))
Consider the following schematic plots of orbital wavefunction (\(\psi_r\)) against distance (\(r\)) from the nucleus.
The figure representing two radial nodes in the orbital is
Two moles of an ideal gas undergo free expansion from \( 10\text{ L} \) to \( 100\text{ L} \) at \( 300\text{ K} \). The values of \( \Delta S_{\text{system}} \) and \( \Delta S_{\text{surroundings}} \) are (\(R\) is universal gas constant)
The amount of carbon dioxide evolved upon complete combustion of \(116\text{ g}\) of \(n\)-butane is
(Given: atomic mass in amu \(\text{H} = 1\), \(\text{C} = 12\) and \(\text{O} = 16\))
The complex which has facial and meridional isomers is
(Given : \(\text{py} = \text{pyridine}\) and \(\text{en} = \text{H}_2\text{N}-\text{CH}_2-\text{CH}_2-\text{NH}_2\))
The compound that CANNOT be obtained from the aldol condensation reaction shown below, is
Given below are two statements:
Statement-I : Heating NaCl with concentrated $\text{H}_2\text{SO}_4$ and $\text{MnO}_2$ results in oxidation of Mn.
Statement-II : Heating NaI with concentrated $\text{H}_2\text{SO}_4$ and $\text{MnO}_2$ results in reduction of Mn.
In light of the above statements, choose the most appropriate answer from the options given below:
Given below are two statements:
Statement-I : Oxidation of \(p\)-nitrotoluene with acidic \(\text{KMnO}_4\) gives an acid that is stronger than benzoic acid.
Statement-II : Reduction of \(p\)-nitrotoluene with Sn/HCl followed by neutralization gives an amine that is more basic than aniline.
In light of the above statements, choose the most appropriate answer from the options given below.
Given below are two statements:
Statement-I : $[\text{Fe}(\text{ox})_3]^{3-}$ is chiral.
Statement-II : trans-$[\text{Cr}(\text{H}_2\text{O})_2(\text{ox})_2]^-$ is chiral.
(Given : \(\text{oxH}_2 = \text{HOOC}-\text{COOH}\))
In light of the above statements, choose the most appropriate answer from the options given below:
Identify the reactions which give aniline as the major product.
The correct statement about peptides and proteins is
Among the following options, the correct trend in the electron gain enthalpy is
The green paramagnetic species formed by heating $\text{KMnO}_4$ at $513\text{ K}$ is
For an elementary chemical reaction, the Arrhenius plot is given below.
If the energy of activation is $6.64 \text{ kJ mol}^{-1}$ and $R = 8.3 \text{ J K}^{-1}\text{ mol}^{-1}$, the temperature at which the rate constant becomes $e^2 \text{ min}^{-1}$, is
The formula of tetraammineaquachloridocobalt(III) chloride is
Consider the following reaction, and choose the correct option.
The number of hydrogen atoms present in \(5.4\text{ g}\) of urea is: \[ \text{Given: Molar mass of urea }=60\text{ g mol}^{-1} \] \[ N_A=6.022\times10^{23}\text{ particles mol}^{-1} \]
The major product formed in the following reaction is p
Calculate the equilibrium constant of the following reaction:
\[ \mathrm{Cu_{(s)} + 2Ag^+_{(aq)} \rightarrow Cu^{2+}_{(aq)} + 2Ag_{(s)}}, \qquad E^\circ_{\text{cell}} = 0.46\,V \]
How many Faradays are required to reduce 1 mol of \( Cr_2O_7^{2-} \) to \( Cr^{3+} \) in acidic medium?
Which of the following does not belong to Group 16 elements?
Which of the following effects is a permanent effect?
According to the mole concept in chemistry, what is the number of carbon atoms in 12 g of Carbon-12?
For a spontaneous process, the value of Gibbs energy change (\(\Delta G\)) is always: