Which one of the following will be sulphonated readily ?
(A) Chlorobenzene
(B) Toluene
(C) Nitrobenzene
(D) Benzene
When benzene is heated in air with V2O5 at 450°C yields_________________?
(A) Phenol
(B) Maleic anhydride
(C) Glyoxal
(D) Benzoic acid
In 1 – pentene -4- yne the carbon exhibit hybridization_________________?
(A) sp3 – sp2
(B) sp2 – sp
(C) sp2 – sp
(D) sp3 – sp2 – sp
The most paramagnetic element is____________________?
(A) Iron
(B) Cobalt
(C) Chromium
(D) Manganese
Which molecule has the highest bond energy among the halogens_________________?
(A) Fluorine
(B) Chlorine
(C) Iodine
(D) Bromine
The most reactive allotropic form of phosphorus is________________?
(A) White
(B) Redox potential
(C) Black
(D) Violet
A safe and more reliable method for drying the crystal is__________________?
(A) Hot air currents
(B) folds of filter paper
(C) oven
(D) Vacuum desiccator
A limiting reactant is one which________________?
(A) is taken in lesser quantity in grams as compared to other reactants
(B) is taken in lesser quantity in volume as compared to other reactants
(C) gives the maximum amount of the product which is required
(D) gives the minimum amount of the product under consideration