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...