Which one of the following substances conducts electricity by the movement of ions ?
(A) Graphite
(B) Copper
(C) Molten sodium chloride
(D) Mercury
The ore CaSO4.H2O has the general name_______________?
(A) Gypsum
(B) Dolomite
(C) Calcite
(D) Plaster of Paris
Which one of the following methods will not give benzene ?
(A) Heating sod. Salt of Benzoic acid with soda lime
(B) Distilling phenol with Zn dust
(C) Chlorobenzene with NaOH at 360°C & 150atm.
(D) Hydrolysis of benzene sulphonic acid with super heated steam
What catalyst is employed when benzene is prepared from acetylene at 70°C?
(A) Cr2O3 + A2O3 + SiO2
(B) Raney nickel
(C) Organo-nickel
(D) Ni 250 – 300°C
The resonance energy of benzene is__________________?
(A) 150.5 kJ/mol
(B) 250.5 kJ/mol
(C) 150.5 Cal/mol
(D) 250.5 Cal/mol
How many moles of H2 are added up when benzene is heated with hydrogen in the presence of platinum ?
(A) Two
(B) Three
(C) Four
(D) Six
Michael Faraday discovered benzene in the gas which was produced by destructive distillation of vegetable oil that is done in________________?
(A) The presence of Oxygen
(B) The presence of Hydrogen
(C) The absence of Oxygen
(D) The presence of excessive Oxygen
When benzene is substituted by halogens only which one of the following halogens only which one of the following halogens is given the number one position in the ring while writing the name of compound ?
(A) Bromine
(B) Chlorine
(C) Fluorine
(D) Iodine
How many electrons are there in benzene to form delocalized electron cloud________________?
(A) 3
(B) 4
(C) 6
(D) 8
Phenanthrene is a fused polycyclic compound contains __________ benzene rings ?
(A) Two
(B) Three
(C) Four
(D) Five