Mixture of catalysts Cr2O3 + A?2O3 + SiO2 at 500?C are used when benzene is prepared from_______________?

Related Mcqs:

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

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

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. 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

4. When catalysts and reactants are in more than one phase it is________________?

   A. Homogeneous catalysis
   B. Heterogeneous catalysis
   C. Catalysis
   D. Ea

5. In network of silica (SiO2) each silicon atom is surrounded by _____________ atoms of osygen?

   A. 4
   B. 2
   C. 1
   D. 6

6. CO2 is gas while SiO2 is solid at room temperature?

   A. carbon is non-metal while silicon is semi-metal
   B. CO2 is an independent molecule while SiO2 has network covalent structure
   C. CO2 forms multiple bond while silicon does not form multiple bonds
   D. Silicon has all sigma bonds

7. Solubility of any salt can be determined from_______________?

   A. Ka
   B. Kb
   C. Kc
   D. Ksp

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

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

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