Que 1:) Toluene is nitrated and the resulting product is reduced with tin and hydrochloric acid. The product so obtained is diazotised and then heated with cuprous bromide. The reaction mixture so formed contains
mixture of o- and p-bromotoluenes mixture of o- and p-dibromobenzenes mixture of o- and p-bromoanilines mixture of o- and m-bromotoluenes
Que 2:) Phenol, when it first reacts with concentrated sulphuric acid and then with concentrated nitric acid, gives
2,4,6-trinitrobenzene o-nitrophenol p-nitrophenol nitrobenzene
Que 3:) Which of the following factors is of no significance for roasting sulphide ores to the oxides and not subjecting the sulphide ores to carbon reduction directly?
Metal sulphides are thermodynamically more stable than CS2 CO2 is thermodynamically more stable than CS2 Metal sulphides are less stable than the corresponding oxides CO2 is more volatile than CS2
Que 4:) α-D-(+)-glucose and β-D-(+)-glucose are
conformers epimers anomers enantiomers
Que 5:) Among the following substituted silanes the one which will give rise to cross linked silicone polymer on hydrolysis is
R4Si RSiCl3 R2SiCl2 R3SiCl
Que 6:) In a compound atoms of element Y from ccp lattice and those of element X occupy 2/3rd of tetrahedral voids. The formula of the compound will be
X4Y3 X2Y3 X2Y X3Y4
Que 7:) Amount of oxalic acid present in a solution can be determined by its titration with KMnO4 solution in the presence of H2SO4. The titration gives unsatisfactory result when carried out in the presence of HCl, because HCl
gets oxidised by oxalic acid to chlorine furnishes H+ ions in addition to those from oxalic acid reduces permanganate to Mn2+ oxidises oxalic acid to carbon dioxide and water
Que 8:) Which one of the following pairs of species have the same bond order?
CN- and NO+ CN- and CN+ O- and CN- NO+ and CN+
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