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

Related Mcqs:

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

   A. Substitution reaction
   B. Addition reaction
   C. Elimination reaction
   D. Oxidation reaction

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. Carboxylic acid on reduction with HI / phosphorous yields_________________?

   A. alkane
   B. alcohols
   C. aldehydes
   D. ketones

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

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

5. 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

6. Benzene is a good solvent for__________________?

   A. fats
   B. resins
   C. iodine
   D. all the above

7. 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

8. Reacting bromine with benzene in the presence of sunlight will result in_______________?

   A. The rupturing of benzene ring
   B. Substitution reaction
   C. Addition reaction
   D. No-reaction

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

   A. acetylene
   B. N-hexane
   C. Benzene sulphonic acid
   D. Sodium benzoate

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

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