List of top Chemistry Questions

In which of the following the corrosion of iron will be most rapid

In which of the following, oxidation number of chlorine is +5 ?

In which of the following pairs, both molecules possess dipole moment?

In which of the following, oxygen has +2 oxidation number ?

In which of the following molecules octet rule is not followed?

In which of the following group of periodic table mp/bp increase down the group ?

In which of the following compounds the oxidation number of carbon is not zero?

In which of the following entropy decreases?

In which of the following acids oxidation state of sulphur is different from that of the others ?

In vulcanisation of rubber

In which allotropic form of sulphur, puckered $S_8$ rings are not present ?

In the structure of diborane

In the sphalerite (ZnS) structure, $S^{2-}$ ions form a face-centred cubic lattice. Then from the Comers, $Zn^{2+}$ ions are present on the body diagonals at

In the reaction of excess of $ {LiAlH_4}$ with crotonaldehyde

In the reaction, $ {H_2O_2 + Na_2 CO_3 -> Na_2O_2 + CO_2 + H_2O}$ the substance undergoing oxidation is

In the reaction,$Cu(s)+ 2Ag^+ (aq) \rightarrow Cu^{2+}(aq) + 2Ag(s)$, the reduction half cell reaction is

In the reaction, $ {3Cl_2 + 6 NaOH -> NaClO_3 + 5 NaCl + 3 H_2O }$ the element which loses as well as gains electrons is

In the reaction between $ {SO_2}$ and $ {O_3}$, the equivalent weight of ozone is

In the reaction : $Cl_2 + OH^- \to Cl^- + ClO_4 + H_2O$

In the reaction $ {2 Na_2S_2O_3 + I_2 -> Na_2 S_4 O_6 + NaI}$ the oxidation number of sulphur is

In the preparation of ethyl chloride by Grooves?>[Anhyd.ZnCl_2] CH_2CH_2Cl + H_2O}$ the main reason for using anhydrous $ {ZnCl_2}$ as catalyst is that

In the preparation of compounds of $Xe$, Bartlett had taken $O^+_2\, PtF_6^-$ as a base compound. This is because

In the presence of oxygen, removal of sulphur from the ore is done in

In the periodic table, the maximum chemical reactivity is at the extreme left (alkali metals) and extreme right (halogens). Which properties of these two groups are responsible for this?

In the metallic crystal