List of top Chemistry Questions

Iodine value is used to determine

The Ostwald's dilution law is obeyed by

Which one of the following forms oleum when dissolved in cone $ {H_2SO_4}$ ?

The EMF of a cell containing sodium/copper electrodes is 3.05 V. If the electrode potential of copper electrode is + 0.34 V the electrode potential of sodium is

The adsorption of inert gases on the surface of activated charcoal increases with

Chloramine- $ T $ is a

For the reaction : $ \ce{H_2 +I_2 -> 2HI} $ , the differential rate law is

The general electronic configuration of the transition elements is

Which equation is true to calculate the energy of activation, if the rate of reaction is doubled by increasing temperature from $ T_1 \, K \, to \, T_2 $ K?

Oxidation of organic compound $'A'$ with $Na_2Cr_2O_7$ and $H_2SO_4$ gives compound $'B'$, which on reduction with $H_2$ in the presence of Ni catalyst gives ethyl alcohol. Give the name of compound $'A'$.

The IUPAC name of the given compound \([Co(NH_3)_5Cl]Cl_2\) is

When SCN\(^{-}\) is added to an aqueous solution containing Fe(NO\(_3\))\(_3\), the complex produced is

The number of unpaired electrons calculated in \(\{Co(NH_3)_6\}^{3+}\) and \(\{CoF_6\}^{3-}\) are

If a plot of \(\log C_0\) versus \(t\) gives a straight line for a given reaction, then the reaction is

The half life period of a first order reaction is 1 min 40 sec. Calculate its rate constant.

The standard free energy change of a reaction is \(\Delta G^\circ = -115\) kJ at 298 K. Calculate equilibrium constant \(K_p\) in \(\log K_p\). (R = 8.314 J k\(^{-1}\) mol\(^{-1}\))

Schottky defects occurs mainly in electrovalent compounds where

The molar conductivities of KCl, NaCl and KNO\(_3\) are 152, 128 and 111 S cm\(^2\) mol\(^{-1}\) respectively. What is the molar conductivity of NaNO\(_3\)?

The electrochemical cell stops working after sometime because :

The amount of electricity required to produce one mole of copper from copper sulphate solution will be

Dipping iron article into a strongly alkaline solution of sodium phosphate

Alkyl cyanides undergo Stephen reduction to produce

A wittig reaction with an aldehyde gives

Cannizzaro reaction is given by

Reaction of PCl\(_3\) and PhMgBr would give