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The ortho/para-directing group among the...

The ortho/para-directing group among the following is

A

`(-COOH)`

B

C

`(-NHCOCunderset(3)(H))`

D

`(-Nunderset(2)(O))`

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What is meant by directive influence of groups ? Sort out the o- and p-, and m-directing groups among the following ? -OH-CN, -COOH, -CH_3, -Br, -OCH_3, -SO_3H

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o,p-directing group are mostly :

A third group is least likely to enter between two groups in the meta relationship. This is the result of steric hindrance and increases in importance with the size of the groups on the ring and with the size of the attacking species. When a Meat-directing group is meta to an ortho-para directing group, the incoming group primarily goes ortho th the meta directing group rather than para. Chlorination of m- chloro nitro benzene gives :

A third group is least likely to enter between two groups in the meta relationship. This is the result of steric hindrance and increases in importance with the size of the groups on the ring and with the size of the attacking species. When a Meat-directing group is meta to an ortho-para directing group, the incoming group primarily goes ortho th the meta directing group rather than para.

A third group is least likely to enter between two groups in the meta relationship. This is the result of steric hindrance and increases in importance with the size of the groups on the ring and with the size of the attacking species. When a Meat-directing group is meta to an ortho-para directing group, the incoming group primarily goes ortho th the meta directing group rather than para.

Ortho effect is special type of effect that is shown by o-subsituents .This ortho-effect operates at the benzoic acids irrespective of the polar type. Nearly all o-substituted benzoic acid are stronger than benzoic acid. Benzoic acid is a resonance stabilised and so the carboxyl group is coplaner with the ring. An o-subsituent tends to prevent this coplanarity. Which among the following will be the strongest acid ?

Why is -CH_(3) group ortho and para directing in toluene ?

Although chlorine is an electron withdrawing group, yet it is ortho-, para- directing in electrophilic aromatic substitution reactions. Why?

Althrough chlorine is an electron withdrawing group, yet it is ortho-para-directing in electrophilic aromatic substitution reactions. Explain why it is so ?

AAKASH INSTITUTE ENGLISH-TEST 6-EXAMPLE
  1. Identify a reagent from the following list which can easily distinguis...

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  2. What would be the product fromed in given reaction

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  3. The ortho/para-directing group among the following is

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  4. When CH(3)CH(2) CHCl(2) is treated with "NaNH"(2) , the product formed...

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  5. Which of the following conformers for ethylene glycol is most stable ?

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  6. Give reasons Chloroform is stored in closed dark coloured bot...

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  7. Ethylene reacts with 1% cold alkaline KMnO(4) to form

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  8. Which of the following compounds is non-aromatic?

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  9. Which of the following compound reacts with Grignard reagent to produc...

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  10. Benzene reacts with I2 in presence of which of the folowing to give i...

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  11. The major product is

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  12. Which of the following alkenes on ozonolysis give a mixture of ketones...

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  13. Which of the following statements is wrong?

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  14. Which of the following carbanion is most stable ?

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  15. The product (B) is

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  16. The major product (B) is

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  17. Which of the following on reductive ozonolysis will give only glyoxal?

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  18. Which of the following species is not electrophilic in nature?

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  19. A mixture of o-nitrophenol and p-nitrophenol can be separated by

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  20. The formation of blood red colouration during Lassaigne's test indicat...

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