List of top Chemistry Questions

The oxidation number of sulphur in $H_2SO_4, H_2S_2O_4 \, and \, H_2S_2O_6$ are respectively

The oxidation number of Mn in $ {KMnO_4}$ is

The oxidation number of Mn in the product of alkaline oxidative fusion of $MnO_2$ is

The oxidation number of Mn is +7 in

The oxidation number of P in $HP_2O^-_7$ ion is

The oxidation number of $Cr$ in $CrO_5$ which has the following structure is

The oxidation number of Fe in $[Fe(CN)_6]^{3-}$ ion is

The oxidation number of iron in $Fe_3O_4$ is

The oxidation number of $Cr\, in\, CrO_5$ is

The oxidation number of carbon in $ {H_2C_2O_4}$

The oxidation number of C in $CH_4, CH_3Cl. CH_2Cl_2, CHCl_3 \,and \,CCl_4$ is respectively

The oxidation number of C in sucrose $C_{12}H_{22}O_{11}$ is

The oxidation number of carbon in $ {CH_2O}$ is

The oxidation number of Ag in Tollen's reagent is

The oxidation number of C and in HCN and HNC respectively are

The oxidation number and covalency of sulphur in sulphur molecule $(S_8) $are

The osmotic pressure of 1 m solution at 27 $^\circ$C is

The osmotic pressure of 5% (mass-volume)solution of cane sugar at 150$^\circ$C (mol. mass of sugar = 342) is

The osmotic pressure of 0.2 molar solution of urea at 300 K (R = 0.082 litre atm $mol^{-1} K^{-1})$ is

The order of size of nucleus and Bohr's radius of an atom respectively are

The ore of aluminium is

The order of stability of free radical is

The order of reactivity of $CH_{3}CHO, CH_{3}COC_{2}H_{5}$ and $CH_{3}COCH_{3}$ is

The order of reactivity of various alkyl halides towards nucleophilic substitution follows the order

The order of reactivity of the following alcohols with halogen acids is