List of top Chemistry Questions

In the compounds $ {KMnO_4}$ and $ {K2Cr2O7}$ the highest oxidation state is of the element :

In the blast furnace (extraction of iron) the highest temperature is in

In test for primary amines, the amine is treated with $ {CHCl_3}$ and KOH and a bad smelling compound is formed. If the primary amine used is ethylamine, identify the bad smelling compound formed?

In spite of being an odd-electron molecule $ClO_2$ does not dimerize because

In $SiO_{4}^{4-}$ , the tetrahedral molecule, two oxygen atoms are shared in

In solid state $PCl_5$ is a _______.

In Solvay ammonia process, sodium bicarbonate is precipitated due to

In $S_{N^1}$ reaction, . the recimisation takes place due to

In pyrophosphoric acid, $H_4P_2O_7$, number of $?$- and $d?-p?$ bonds respectively are

In Rosenmund's reaction

In potash alum, potassium and aluminium are present as

In oxidation of oxalic acid by KMn$O_{4}$, the colour of KMn$O_{4}$ disappears slowly at the start of reaction but disappears very fast afterwards. This is an example of

In order to obtain acetaldehyde from calcium acetate, it should be heated with :

In order to prepare acetone from acetyl chloride which of the following reagents can be used ?

In nucleotide of a nucleic acids, the sequence is

In $NaCl$ structure,

In metallurgy, flux is a substance used to convert

In metallurgical processes the flux used for removing acidic impurities is

In lake test of $ {Al^{3+}}$ ion, there is formation of coloured floating. It is due to :

In h.c.p arrangement, the co-ordination number is

In general, the melting and boiling points of transition metals

In fibrous proteins, polypeptide chains are held together by

In face centred cubic unit cell, edge length is

In fcc arrangement of A and B atoms, where A atoms are at the corners of the unit cell, B atoms at the face centres. Two atoms are missing from two corners in each unit cell, then the simplest formula of the compound is

In ferrous ammonium sulphate oxidation number of Fe is