List of top Chemistry Questions

What will be the value of activation energy ( $ E_a $ in $ kJ $ ) and rate constant ( $ k\, in\, min^{-1} $ ) for the given equation at $ 27^{\circ}C $ ? The equation : $ lnk = - 2576/T+ 12.1 $

Concentration of the $Ag^+$ ions in a saturated solution of $Ag_2C_2O_4$ is $2.2 \times 10^{-4}\, mol\, L^{-1}$ Solubility product of $Ag_2C_2O_4$ is :-

The following equilibrium constants are given $N _{2}+3 H _{2} \rightleftharpoons 2 NH _{3} ; K _{1}$ $N _{2}+ O _{2} \rightleftharpoons 2 NO ; K _{2}$ $H _{2}+1 / 2 O _{2} \rightleftharpoons H _{2} O ; K _{3}$ The equilibrium constant for the oxidation of the $NH _{3}$ by oxygen to give $NO$ is:

An example of a sigma bonded organometallic compound is :

$HgCl_2$ and $I_2$ both when dissolved in water containing $I^-$ ions the pair of species formed is :

The ground state magnetic property of $B_2$ and $C_2$ molecules will be

In a close-packed body-centred cubic lattice of potassium, the correct relation between the atomic radius $(r)$ of potassium and the edge-length $(a)$ of the cube is

Reduction of the lactol  OH with sodium borohydride gives

$3ClO^{-}(aq) -> ClO^- + 2Cl^-$ is an example of

Pick out the correct statement with respect to $[Mn(CN)_6]^{3-}$ :

It is because of inability of $ns^{2}$ electrons of the valence shell to participate in bonding that:-

It is because of inability of $ns^{2}$ electrons of the valence shell to participate in bonding that:-

In which of the following, homolytic bond fission takes place ?

In which of the following, homolytic bond fission takes place ?

Pick up the incorrect statement from the following

Which of the following pairs of species have the same bond order ?

Which one is the wrong statement ?

The conversion of ethyl bromide to ethyl iodide using sodium iodide and dry acetone, this reaction is known as

Identify the correct statement in the following

Bactericidal antibiotics among the following is

A reaction has both $\Delta \,H$ and $\Delta \,S$ - ve The rate of reaction

Addition of mineral acid to an aqueous solution of Borax, the following compound is formed

Which of the following element forms $p_{\pi} - p_{\pi}$ bond with itself ?

Which of the following structure of a molecule is expected to have three bond pairs and one lone pair of electrons ?

Which of the following is the correct electron dot structure of $N_2O$ molecule ?