List of top Chemistry Questions

For a reaction type \(A + B \rightarrow\) products, it is observed that doubling concentration of \(A\) causes the reaction rate to be four times as great, but doubling amount of \(B\) does not affect the rate. The unit of rate constant is
A chemical reaction was carried out at \(320\,K\) and \(300\,K\). The rate constants were found to be \(k_1\) and \(k_2\) respectively. Then
For the reaction,
\[ 2A(g) + B_2(g) \rightleftharpoons 2AB_2(g) \] the equilibrium constant, \(K_p\) at \(300\,K\) is \(16.0\). The value of \(K_p\) for \(AB_2(g) \rightleftharpoons A(g) + \dfrac{1}{2}B_2(g)\) is
The standard Gibbs free energy change, \(\Delta G^\circ\) is related to equilibrium constant, \(K_p\), as
The yield of the product in the reaction
\[ A_2(g) + 2B(g) \rightleftharpoons C(g) + Q\,kJ \] would be higher at
In which of the following case, does the reaction go farthest to completion?
The radius of \(Na^+\) is \(95\,pm\) and that of \(Cl^-\) ion is \(181\,pm\). Hence, the coordination number of \(Na^+\) will be
Most crystals show cleavage because their atoms, ions or molecules are
Frenkel defect is generally observed in
The equivalent conductance at infinite dilution of a weak acid such as HF
The number of Faradays needed to reduce \(4\,g\) equivalents of \(Cu^{2+}\) to Cu metal will be
Which one of the following cells can convert chemical energy of \(H_2\) and \(O_2\) directly into electrical energy?
Which of the following is a Gattermann aldehyde synthesis?
Aldol is
On treatment of propanone with dilute \(Ba(OH)_2\), the product formed is
Formation of cyanohydrin from a ketone is an example of
The activity of an old piece of wood is just \(25%\) of the fresh piece of wood. If \(t_{1/2}\) of \(C\text{-}14\) is \(6000\,yr\), the age of piece of wood is
A radioactive element \(X\) emits \(3\alpha\), \(1\beta\) and \(1\gamma\)-particles and forms \({}^{76}_{35}Y\). Element \(X\) is
Mg is an important component of which biomolecule occurring extensively in living world?
The fatty acid which shows reducing property is
Glycerol on treatment with oxalic acid at \(110^\circ C\) forms
The reaction, \(ROH + H_2CN_2\) in the presence of \(HBF_4\), gives the following product
Transition metals usually exhibit highest oxidation states in their
Which metal aprons are worn by a radiographer to protect him from radiation?
Which of the following converts \(CH_3CONH_2\) to \(CH_3NH_2\)?