Benzene is heated in air with V2O5 at 450°C it undergoes________________?

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1. When benzene is heated in air with V2O5 at 450°C yields_________________?

   A. Phenol B. Maleic anhydride C. Glyoxal D. Benzoic acid...

2. Water gas heated at 450?C and 200 atm pressure in the presence of ZnO+Cr2O3 will produce________________?

   A. methanol B. methanol C. carbonic acid D. methane...

3. In benzene sulphonic acid the sulphonic group is attached with benzene ring through ___________________?

   A. Hydrogen B. Oxygen C. Sulphur D. OH...

4. 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...

5. Phenanthrene is a fused polycyclic compound contains __________ benzene rings ?

   A. Two B. Three C. Four D. Five...

6. 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...

7. 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...

8. Replacement of hydrogen of benzene by alkyl group in the presence of alkyl halide & aluminum chloride is known as__________________?

   A. Dows process B. Friedel & Craft acylation C. Friedel & Craft alkylation D. Clemmenson reduction...

9. By which method the molecular mass of benzene was determined as 78.108 ?

   A. Specific gravity method B. Vapour density method C. X-ray diffraction method D. Distillation methos...

10. The preparation of benzene from acetylene can also be said as_________________?

    A. Oxidation B. Polymerization C. Dehydration D. Condensation...