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When phenol reacts with which one of the...

When phenol reacts with which one of the following reagents ,a conjugate diketone will be formed ?

A

`Na_2Cr_2O_7`

B

` conc . HNO_3`

C

` Zn ,Delta `

D

`Na, Cr_2O_7 +H_2SO_4`

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The correct Answer is:
D
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AAKASH SERIES-APPENDICES -REVISION EXERCISE -PHENOLS
  1. The electrophile involved in the above reaction is

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  2. The reaction C6 H5 OH underset( "Pyridine") overset( CH3COCl) to C6H6...

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  3. Which of the following is most acidic ?

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  4. The increasing order of boiling points of below mentioned alcohols is ...

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  5. The descending order of kb values of the following compounds is

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  6. Phenols are more acidic than alcohols due to (a) In phenols,- OH i...

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  7. Arrange the following compounds in increasing order of their acid stre...

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  8. Phenol overset( conc. H2SO4 )to A overset( Conc .HNO3) to B Here A...

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  9. Phenol overset( NaOH) to A underset((2)H^(+)) overset((i)CO2) to B ove...

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  10. Phenol overset((CH3CO) 2O,H^(+)) to A overset(AlCl3.Delta )to B+C I...

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  11. One mole of phenol is warmed with sodium metal . If we assume 100% yie...

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  12. When phenol reacts with which one of the following reagents ,a conjuga...

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  13. Benzene overset( "oleum") to A overset( NaoH) to B underset( -NaCl)ove...

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  14. Phenol gives characteristic colouration with

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  15. If we use carbon tetrachloride in Reimer- Tiemann reaction in place of...

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  16. When benzene sulfonic acid and p-nitrophenol are treated with NaHCO(3)...

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  17. Ortho -Nitrophenol is less soluble in water than p-and m- Nitrophenol ...

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  18. Phenol is heated with an aqueous solution of Bromine. The major produc...

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  19. From amongst the following alcohols, the one that would react fastest ...

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  20. The electrophile involved in the above reaction is

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