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Unlike phenol 2,4 dinitrophenol and 2 4...

Unlike phenol 2,4 dinitrophenol and 2 4,6 trinitro phenol are soluble in aqeous sodium carbonate solution. Why?

Text Solution

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Because of the strong clectron withdrawing nature of `-NO_2` group. both 2,4 - dinitrophenol and `2,4,6` - trinitrophenol are more acidic than carbonic acid and hence dissolve in aq. `Na_2 CO_3` solution to form the corresponding sodiuni salts with the evolution of `CO_2`
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Knowledge Check

  • The number of O_(2) molecules and its volume at S.T.P in 50.6g of hydrated sodium carbonate ore :

    A
    `6.926xx10^(23), 22.4` litre
    B
    `5.92xx10^(21), 25.76` litre
    C
    `6.926xx10^(23), 25.76` litre
    D
    `5.92xx10^(21), 22.4` litre

  • The number of O_(2) molecules and its volume at S.T.P in 50.6 g of hydrated sodium carbonate ore:

    A
    `6.926 xx 10 ^(23), 22.4 ` litre
    B
    `5. 92 xx 10 ^(21) ,25.76` litre
    C
    `6.926 xx 10 ^(23), 25.76` litre
    D
    `5.92 xx 10 ^(21) , 22.4 ` litre

  • When we pass carbon dioxide gas through a green coloured solution of potassium manganate, the colour of solution changes to purple and a brown coloured solid gets precipitated. The green colour of potassium manganate solution also becomes purple when it is subjected to electrolysis using iron electrodes. In following reaction 3 K_2 underset("(green)")(MnO_4 + 2H_2 O + 4CO_2 to underset("(purple)")(2KmnO_4 )+MnO_2 + 4KHCO_3 the function of CO_2 is

    A
    to make solution acidic
    B
    to make solution basic
    C
    to act only as a medium of reaction
    D
    none of the above

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    Assertion : Carbon oxygen bond length of phenol is slightly less than that in methanol. Reason : There exist apartial double bond character and carbon to which oxygen is attached in phenol is sp^2 hybridised.

    Assertion : Carbon oxygen bond length of phenol is slightly less than that in methanol. Reason : There exist a partial double bond character and carbon to which oxygen is attached in phenol is sp^2 hybridised.

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