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Statement-1. The guache conformation of ...

Statement-1. The guache conformation of ethylene glycol is more stable than its anti conformation
Statement-2. The gauche conformation is stabilized by H-bonding.

A

Statement-1 is True, Statement-2 is True , Statement-2 is a correct explanation for Statement-1

B

Statement-1 is True, Statement-2 is True , Statement-2 is not a correct explanation for Statement-1

C

Statement- 1 is True, Statement-2 is False

D

Statement-1 is False, Statement -2 is True

Text Solution

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The correct Answer is:
A
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The most stable conformation of ethylene glycol is :

The staggered conformation of ethane is more stalble than its elispsed conforamtion by about

The anti-conformation of n -butane is more stable than its gauche conformation by about

The anti-conformation of n -butane is more stable than its fully eclipsed conformation by about

A : Gauch conformer of ethylene glycol is most stable R : It is due to the formation of intramolecular hydrogen bonding:

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

Knowledge Check

  • The most stable conformation of ethylene glycol is :

    A
    Anti
    B
    Gauche
    C
    Partially eclipsed
    D
    fully eclipsed

  • The staggered conformation of ethane is more stalble than its elispsed conforamtion by about

    A
    `4"kcal mol"^(-1)`
    B
    `5"kcal mol"^(-1)`
    C
    `2"kcal mol"^(-1)`
    D
    `3"kcal mol"^(-1)`

  • The anti-conformation of n -butane is more stable than its gauche conformation by about

    A
    `5KJ mol^(-1)`
    B
    `3.8KJ mol^(-1)`
    C
    `6.2KJ mol^(-1)`
    D
    `4.5KJ mol^(-1)`
    • PRADEEP-HYDROCARBONS-Competition Focus (JEE(main and advanced)/Medical Entrance) VIII. ASSERTION - REASON TYPE QUESTIONS
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    13. Assertion. Propene reacts with hydrogen chloride in presence of organi...

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    14. Assertion. C-H bond in ethyne is shorter than C-H bonds in ethene. ...

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    15. Assertion. Calcium carbide on hydrolysis gives ethylene Reason. Cal...

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    16. Assertion. Acidity of the C-H bond decreases in the order: HC-=CH gt H...

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    17. Assertion. Acetylene reacts with sodamide te evolve H2 gas Reason. ...

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    18. Assertion : Acetylene on reacting with sodamide gives sodium acetylide...

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    19. Assertion. Addition of H2O to acetylene occurs in presence of dil. H2S...

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    20. Assertion. But 1-yne and but-2-yne can be distinguished by ammoniacal ...

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