List of top Chemistry Questions

The validity of Freundlich isotherm can be verified by plotting:
The \( E^\Theta \) of \( M^{2+}|M \) is 0.3 V. At what concentration of \( Cu^{2+} \) (in mol \( L^{-1} \)), the \( E_{\text{cell}} \) value becomes zero?
\( \left(\frac{2.303RT}{F} = 0.06\right) \) (Conc. of \( M^{2+} = 0.1M \)).
The diffraction pattern of a crystalline solid gave a peak at \( 2\theta = 60^\circ \). What is the distance (in cm) between the layers that gave this peak? \[ \text{(Given: Wavelength } \lambda = 1.544\text{ Å, } \sin 30^\circ = 0.5, \sin 60^\circ = 0.866, n=1) \]
Aluminium carbide on reaction with \( D_2O \) gives \( Al(OD)_3 \) and ‘X’. What is ‘X’?
In which of the following reactions, dihydrogen is not evolved?
Arrange the following pesticides in the chronological order of their release into the market: A: Organophosphates
B: Organochlorides
C: Sodium chlorate
RMS velocity of one mole of an ideal gas was measured at different temperatures. A graph of \( (u_{\text{rms}})^2 \) (on y-axis) and \( T/K \) (on x-axis) gave a straight line passing through the origin, and its slope is \( 249 \, \text{m}^2 \text{s}^{-2}\text{K}^{-1} \). What is the molar mass (in kg mol\(^{-1}\)) of the ideal gas? \(( R = 8.3 \, \text{J mol}^{-1} \text{K}^{-1} )\)
Identify the incorrect statements from the following: I. \( \Delta S_{\text{system}} = (\Delta S_{\text{total}} + \Delta S_{\text{sur}}) \) II. \( A(l) \rightarrow A(s) \); for this process entropy change decreases III. Entropy units are \( J \ K^{-1} \ mol^{-1} \)
The correct formula used to determine the formal charge (\( Q_f \)) on an atom in the given Lewis structure of a molecule or ion is (V = number of valence electrons in free atom, U = number of unshared electrons on the atom, B = number of bonds around the atom)
Correct set of four quantum numbers for the valence electron of strontium (Z = 38) is
The bond lengths of diatomic molecules of elements X, Y, and Z respectively are 143, 110, and 121 pm. The atomic numbers of X, Y, and Z respectively are:
Among the following, the molecule in which all atoms obey the octet rule is
What is the correct equation that relates kinetic energy (\(E_{\text{ke}}\)) and pressure (\(P\)) of one mole of an ideal gas? - (V = Volume)

At T(K), the following graph is obtained for an ideal gas.

Which of the following graphs correctly represents the work done on the gas (shaded part)?

Identify the correct statements from the following: I. Conjugate base of chloric acid is \( ClO^- \)
II. \( AlCl_3 \) is a Lewis acid
III. Conjugate base of \( NH_3 \) is \( NH_2^- \)
The anions present in baking soda, caustic soda, and washing soda respectively are
The products formed in the reaction of \( BeCl_2 \) with \( LiAlH_4 \) are
Identify the reaction in which hydrogen gas is not liberated
Assertion (A): Silicones are used in surgical and cosmetic plants Reason (R): Silicones have high thermal stability
The minimum concentration (ppm) of dissolved oxygen in water that is required for the growth of fish is

Observe the following formula 

 The groups/atoms in the plane of the paper are

IUPAC name of neohexyl alcohol is
From the following, identify the set that contains all meta directing groups:
Two statements are given below Statement I: The resonance structure with more number of covalent bonds is less stable. Statement II: The position of nuclei does not change in resonance structures.
A crystal is formed by X (cations) and Y (anions). Atoms of Y form ccp and atoms of X occupy half of octahedral voids and half of tetrahedral voids. What is the molecular formula of the crystal?