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Which of the following is/are examples (...

Which of the following is/are examples (s) of aldol condensation?

A

`2CH_(3)CHOoverset(dil.NaOH)rarrCH_(3)-overset(OH)overset(|)(CH)-CH_(2)-CHO`

B

`2CH_(3)-overset(O)overset(||)C-CH_(3)overset(dil.NaOH)rarrCH_(3)-underset(CH_(3))underset(|)overset(OH)overset(|)C-CH_(2)-overset(O)overset(||)C-CH_(3)`

C

`2HCHOoverset(dil.NaOH)rarrCH_(3)OH+HCOOH`

D

`C_(6)H_(5)CHO+HCHOoverset(dil.NaOH)rarrC_(6)H_(5)CH_(2)OH`

Text Solution

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The correct Answer is:
A, B
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Knowledge Check

  • In aldol condensation

    A
    `alpha`- hydrogen attacks on carbonyl carbon
    B
    `alpha-` carbon attacks on carbonyl carbon
    C
    `beta-`carbon attacks onn carbonyl carbon
    D
    `beta-`hydrogen attacks on carbonyl carbon

  • Which of the following are examples of aldol condensation?

    A
    `2CH_(3)CHO overset(dil. NaOH)to CH_(3)CHOHCH_(2)CHO`
    B
    `2CH_(3)COCH_(3) overset(dil. NaOH)to CH_(3)C(OH)(CH_(3))CH_(2)COCH_(3)`
    C
    `2HCHO overset(dil. NaOH)to CH_(3)OH+HCOOH`
    D
    `C_(6)H_(5)CHO+HCHO overset(dil. NaOH)to C_(6)H_(5)CH_(2)OH`

  • Which of the following are examples of aldol condensation ?

    A
    `2CH_(3)CHO overset("diL NaOH")to CH_(3)CHOHCH_(2)CHO`
    B
    `2CH_(3)COCH_(3) overset("ull. NuOH")to CH_(3)C(OH)(CH_(3))CH_(2)COCH_(3)`
    C
    `2HCHO overset("dil. NaOH)to CH_(3)OH`
    D
    `C_(6)H_(5)CHO+HCHO overset("dil. NaOH")to C_(6)H_(5)CH_(2)OH`
    • OP TANDON-ALDEHYDES AND KETONES -OBJECTIVE QUESTIONS (LEVEL -B) SET II
    1. Which of the following is/are examples (s) of aldol condensation?

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    2. The final product of the following reaction, is :

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    3. In acidic medium in presence of conc. H(2)SO(4) acetaldehyde will give...

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    4. Which compound undergo Cannizzro's reaction ?

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    5. Raction of Grignard reagent with ......gives alcohol.

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    6. Which of the following reaents react in a same manner with HCHO,CH(3)C...

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    7. A plastic bakelite is obtained from :

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    8. Which statement are corrrect in the case of acetaldehyde and acetone?

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    9. Which are mixed ketones?

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    10. CH(2)Cl(2) on heating with NaOH solution gives :

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    11. Which gives nucleophilic addition reactions ?

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    12. Gem dihalides on hydrolysis from :

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    13. Which of the following compounds will give positive idodoforms test?

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    14. Grignard reagent can give aldehyde with :

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    15. Which of the following reagents react in a same manner with HCHO and C...

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    16. The names of the compound CH(3)CH(2)CH(2)CH(2)CHO are

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    17. Which of the following methods can be used to prepare aldehydes ?

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    18. Ketones can be prepared by :

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    19. Which of the following compounds will give Fehlings' solution test?

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    20. Which of the following will undergo aldol condensation ?

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