List of top Chemistry Questions

How many of the following ligands are stronger than H₂O? \[ {S}^{2-}, \, {Br}^-, \, {C}_2{O}_4^{2-}, \, {CN}^-, \, {en}, \, {NH}_3, \, {CO}, \, {OH}^- \]
Which of the following lanthanides have [Xe] 4f⁵ 5d¹ 6s² configuration in their ground state?
Impure silver ore + CN⁻ + H₂O → [X]⁻ + OH⁻
[X]⁻ + Zn → [Y]²⁺ + Ag (pure)
The co-ordination numbers of the metals in [X], [Y] are respectively:
Which of the following is incorrectly matched?
The correct statement regarding chemisorption is
The rate constant of a first-order reaction is \( 3.46 \times 10^3 \, {s}^{-1} \) at 298K. What is the rate constant of the reaction at 350 K if its activation energy is 50.1 kJ mol\(^{-1}\) (R = 8.314 J K\(^{-1}\) mol\(^{-1}\))?
The standard free energy change (\( \Delta G^\circ \)) for the following reaction (in kJ) at 25°C is \[ 3Ca(s) + 2 Au^{+}(aq, 1M) \rightleftharpoons 3Ca^{2+}(aq, 1M) + 2Au(s) \] (given: \( E^\circ_{{Au}^{3+/2+}} = +1.50 \, V \), \( E^\circ_{{Ca}^{2+/Ca}} = -2.87 \, V \), \( F = 96500 \, {C mol}^{-1} \))
A solution was prepared by dissolving 0.1 mole of a non-volatile solute in 0.9 moles of water. What is the relative lowering of vapor pressure of the solution?
100 mL of \( M \times 10^{-1} \) Ca(NO₃)₂ and 200 mL of \( M \times 10^{-1} \) KNO₃ solutions are mixed. What is the normality of the resulted solution with respect to NO₃⁻?
What are the variables in the graph of powder diffraction pattern of a crystalline solid?
Which of the following alkenes does not undergo anti-Markovnikov addition of HBr?
A mixture of ethyl iodide and n-propyl iodide is subjected to Wurtz reaction. The hydrocarbon which will not be formed is:
The BOD values for pure water and highly polluted water are respectively:
The method for preparation of water gas is:
A Lewis acid 'X' reacts with LiAlH$_4$ in either medium to give a highly toxic gas, 'Y'. 'Y' when heated with NH$_3$ gives a compound known as inorganic benzene. 'Y' burns in oxygen and gives H$_2$O and 'Z'. 'Z' is:
As per standard reduction potential values, which is the strongest reducing agent among the given elements?
The equation that represents ‘coal gasification’ is:
At \( T(K) \), the solubility product of \( AX \) is \( 10^{-10} \). What is the molar solubility of \( AX \) in 0.1 M HX solution?

Kc for the reaction \[ A(g) \rightleftharpoons T(K) + B(g) \] is 39.0. In a closed one-litre flask, one mole of \( A(g) \) was heated to \( T(K) \). What are the concentrations of \( A(g) \) and \( B(g) \) (in mol L\(^{-1}\)) respectively at equilibrium?

Identify the correct statements from the following:

Two statements are given below: 
Statement I: Viscosity of liquid decreases with increase in temperature. 
Statement II: The units of viscosity coefficient are Pascal sec. The correct answer is:

The RMS velocity (\(v_{{rms}}\)) of one mole of an ideal gas was measured at different temperatures and the following graph is obtained. What is the slope (m) of the straight line? 

Observe the following sets: 

Which of the above sets are correctly matched?

Which of the following orders are correct regarding their covalent character?
(i) \( \text{KF} < \text{KI} \)
(ii) \( \text{LiF} < \text{KF} \)
(iii) \( \text{SnCl}_2 < \text{SnCl}_4 \)
(iv) \( \text{NaCl} < \text{CuCl} \)

The correct order of atomic radii of given elements is