List of top Chemistry Questions

At $ 25 ^{\circ}C $ the pH value of a solution is $6$, the solution is:

Which of the noble gas has highest polarizability

$4.6 \,kJ$ heat is liberated on burning $0.5 \,g$ of sulphur. The enthalpy of formation of $ SO_{2} $ is: [molecular weight of $S = 32, O = 16]$

Isotopes have :

Solutions with same osmotic pressures are called

The alcohol which is used as a beverage is

Rate determining step in nitration of benzene is

Percentage of Se (at. mass $=78.4$ ) in peroxidase anhydrase enzyme is $0.5 \%$ by weight, then minimum molecular mass of peroxidase anhydrase enzyme is

$ { PbO_2 -> PbO \, \Delta G_{298} < 0 }$ $ { SnO_2 -> SnO \, \Delta G_{298} > 0}$ Most probable oxidation state of Pb & Sn will be :

Molarity of liquid HCl if density of li HCl is 1.17 gm/cc : -

Minimum excitation potential of Bohrs first orbit in hydrogen atom is:

Lithopone is:

$dsp^2$ hybridisation is found in

Crystalline solids have

Correct equation of Freundlich isotherm is

The IUPAC name of $K_3[Ir(C_2O_4)_3]$ is

Correct order of the size of iodine species is

In $[Co(NH_3)_6]CI_3$, the number of covalent bonds is

Which of the following is the life saving mixture for an asthma patient ?

Which of the following compound is obtained on passing ethanol vapours on heated $Al_20_3 $?

What causes nitrogen to be chemically inert ?

Which of the following compounds is explosive in nature ?

Ethylene may be obtained by the treatment of concentrated $H_2SO_4$ and $X $ bat $160-170^{\circ} C. X$ is

At room temperature, HCl is a gas while HF is a low boiling liquid. This is because

Water is used as a moderator in nuclear reactor. Moderator is a light substance that absorb neutrons.