List of top Chemistry Questions

The pH of $D_2O$ and $H_2O$ at 298 K is
The percentage of element M is 53 in its oxide of molecular formula $M_2O_3$. Its atomic mass is about
The percentage of radioactive substance left after 5 half lives is
The percentage by weight of hydrogen in $H_2O_2$ is
The peptide linkage formed between glycine $(NH_{2}CH_{2}COOH)$ and alanine
to give glycylalanine can be shown as
The partial pressure of hydrogen in a flaskcontaining 2 g of $H_2$ and 32 g of $S0_2$ is
The particle size ranges from_________in colloidal state
The pale blue syrupy liquid, $H_{2}O_{2}$ discovered by J. Thenard, is estimated by using
The oxide which on dissolving in water turns blue litmus red is
The oxide of nitrogen that is neutral in character is
The oxidation state of oxygen in $O_2F_2$ is
The oxidation state of phosphorus vary from
The oxidation states of iodine in $ {HIO_4, H_3IO_5}$ and $ {H5IO6}$ are respectively
The oxidation states shown by hydrogen are
The oxidation number of sulphur in $ {H2S2O7}$ is:
The oxidation state of Fe in $K_4[Fe(CN)_6]$ is
The oxidation state of osmium (Os) in $ {OsO_4}$ is
The oxidation state of oxygen in $O_2 Pt F_6$
The oxidation number of P in $Mg_2P_2O_7$ is
The oxidation number of S in $ {Na_2S_4O_6}$ is
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