List of top Chemistry Questions

The decomposition of \(H_{2}O_{2}\) in the presence of \(I^{-}\) in alkaline medium has the rate law.
The standard EMF of the cell \(Mg(s)\,|\,Mg^{2+}(0.01\,M)\,||\,Ag^{+}(0.0001\,M)\,|\,Ag(s)\) is 3.17 V at \(25^{\circ}C\). The EMF of the cell at the same temperature is (2.303RT/F at \(25^{\circ}C\) is 0.06 V).
In a free expansion of a gas
The oxidation numbers of carbon and hydrogen in methane are respectively
Consider the equilibrium reaction, \(X(g) + Y(g) \rightleftharpoons W(g) + Z(g)\). The equilibrium constant \(K_C\) for the reaction is \(2.0 \times 10^2\) at 300 K and it decreases with increase in temperature. Which of the following is true for the reaction?
For the homogeneous equilibrium \(N_{2(g)} + 3H_{2(g)} \rightleftharpoons 2NH_{3(g)}\), the equilibrium constants \(K_P\) and \(K_C\) are related as:
Which of the following bond has the lowest mean bond enthalpy?
The bond order in $(\mathrm{NO}^+)$ ion is
Which of the following molecule does not have zero dipole moment?
The first law of thermodynamics can be stated as
Which one of the following is not isoelectronic with other isoelectronic species?
What is the shape of chlorine trifluoride?
Among the noble gas elements the one with the highest electron gain enthalpy is
Americium belongs to
The number of nodal surfaces present in '4s' orbital is
The product of uncertainty in position and uncertainty in momentum is constant. This is known as
For a given sub-shell with azimuthal quantum number 'l' the number of magnetic quantum numbers possible is
The number of molecules of ethane (molar mass $=30$) present in 3 g of pure ethane is
How will you confirm the presence of five –OH groups in a glucose molecule, which are attached to different carbon atoms?
A solution contains 0.25 moles of non-volatile solute dissolved in one mole of solvent. Then calculate the % vapor pressure of solution relative to the vapor pressure of pure solvent.
The pressure of solution that just prevents the flow of solvent is called:
Which of the following pair of species have different Lewis structures? (A) \( \mathrm{SO_3^{2-}, CO_3^{2-}} \)
(B) \( \mathrm{O_2^{2-}, F_2} \)
(C) \( \mathrm{CN^- , CO} \)
(D) \( \mathrm{NH_3, H_3O^+} \)
(E) \( \mathrm{MnO_4^- , CrO_4^{2-}} \)
What is the IUPAC name for Acetone?
Which of the following is a soft metal?
Which of the following set of amino acids have one letter code as F and Q ?}