List of top Chemistry Questions

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 and covalency of sulphur in sulphur molecule $(S_8) $are
The oxidation number of Ag in Tollen's reagent is
The oxidation number of C and in HCN and HNC respectively 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 ore of aluminium is
The order of stability of free radical is
The order of size of nucleus and Bohr's radius of an atom respectively are
The order of reactivity of the following alcohols with halogen acids is
The order of rate of hydrolysis of alkyl halides: $1^{\circ}, 2^{\circ}, 3^{\circ}$ and $CH_3X$ by $S_N2$ pathway 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 ionization energies of different orbital is
The order HF < HCl < HBr < Hl corresponds to which of the following properties ?
The orbital configuration oi $_{24}Cr$ is $3d^5 4s^1$. The number of unpaired electrons in $Cr^{3+} (g)$ is
The oil used in the floatation method for the purification of ores is