How many electrons are there in benzene to form delocalized electron cloud________________?

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. When an electron is moving with velocity of 2.188 x 106 ms-1 in the first orbit of Bohrs model of hydrogen. The de Broglie wavelength of electron is______________?

   A. 0.33 nm
   B. 0.34 nm
   C. 0.35 nm
   D. 0.36 nm

3. A metallic atom loses its valence electron to form a/an _________?

   A. an anion
   B. a cation
   C. an anion – cation
   D. none of these​

   Submitted by: Aamir khan Hullio

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. 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

6. 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

7. Which one of the following statement is not correct about benzene ?

   A. On hydrogenation 208 KJ/mole is liberated
   B. C-H bond length in benzene is 1.09 A?
   C. Molecular mass of benzene is 78.108
   D. Resonance energy of benzene is 150.5 K Cal/mole

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. Aniline is a derivative of benzene which contains__________________?

   A. Imino group
   B. Amino group
   C. Amide group
   D. Nitro group

10. Benzene does not undergo___________________?

    A. Substitution reaction
    B. Addition reaction
    C. Polymerization reactions
    D. Oxidation reactions