List of top Chemistry Questions

Biochemical Oxygen Demand, $(BOD)$ is a measure of organic material present in water. $BOD$ value less than $5\, ppm$ indicates a water sample to be_______.

Biodegradable pollutant is

$BF_3$ on hydrolysis gives

Best way to prevent rusting of iron is by

$BeO$ is insoluble but $BaO$ is soluble as

Benzyl amine reacts with nitrous acid to form

Benzyl alcohol is obtained from benzaldehyde by

Benzoquinone is prepared by reaction of phenol with

Benzene does not undergo addition reaction easily because

Benzene on ozonolysis yields

Benzenediazonium chloride on treatment with KCN in presence of copper powder gives :

BeCl in vapour state and solid state -

Benzene diazonium chloride reacts with hypophosphorous acid to produce:

_______ being highly reactive is used in the extraction of chromium and manganese.

Benedict solution provides

$ {Be2C +H2O-> BeO +X}$ $ {CaC2 + H2O->Ca(OH)2 + Y}$ $ {Mg2C3 + H2O-> Mg(OH)2 + Z}$ $X, Y$ and $Z$ are respectively

$ {BCl_3}$ does not exist as dimer but $ {BH_3}$ exists as dimer $ {(B_2H_6)}$ because

$ {BCl_3}$ is planar molecule because in this molecule boron is

$BaSO_4$ is insoluble in water due to its

Barbituric acid and its derivatives are well known as

Bakelite is a product formed from

Bakelite is the condensation polymer of

B.H.C. is used as an:

Azo dye is prepared by the coupling of phenol and

Atomic number of an element is 22. The highest O.S. exhibited by it in its compounds is