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Why is H(2)O a liquid and H(2)S a gas?...

Why is `H_(2)O` a liquid and `H_(2)S` a gas?

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Due to greater electronegativity of `O` than `S_(1)H_(2)O` undergoes extensive intermolecular `H`-bonding.As a result, `H_(2)O` exists as an associated molecule in which each `O` is tetraherally surrounded by four water molecular.Quite a larger amount of energy is required to break these `H`-bonds.Therefore , `H_(2)O` is a liquid at room temperature.

In constant, `H_(2)S` does not undergo `H`-bonding.It exists as discrete molecules which are held together by weak van der Waals forces of attraction.To break these forces of attraction, only a small amount of energy is required.Therefore, `H_(2)S` is gas at room temperature.
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Why is H_2O a liquid and H_2S a gas?

Why is H_2O a liquid and H_2S a gas at room temperature ?

Knowledge Check

  • Assertion (A): H_(2)O a liquid and H_(2)S a gas. Reason (R): Water molecules are held by H-bonds while in H_(2)S molecules no such interactions are present between molecules.

    A
    Both A and R are true and R is the correct explanation of A
    B
    Both A and R are true but R is NOT the correct explanation of A
    C
    A is true but R is false
    D
    A is false and R is True.

  • H_2O is liquid and H_2S is a gas because

    A
    oxygen forms stronger hydrogen level than sulphur.
    B
    oxygen is less electronegative than sulphur.
    C
    atomic radius of oxygen is less than that of sulphur.
    D
    atomic radius of oxygen is greater than that of sulphur.

  • H_(2)O is liquid and H_(2)S is a gas because -

    A
    Oxygen form stronger hydrogen bond than sulphur
    B
    Oxygen is less electronegative than sulphur
    C
    Atomic radius of oxygen is less than that of sulphur
    D
    Atomic radius of oxygen is greter than that of sulphur

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    Why is H_2O a liquid and H_2S a gas ?

    Why H_(2) O is a liquid while H_(2) S is a gas ?

    Explain (a )Which d-orbital in involved in (i) sp^(3) d hybridisation (ii) sp^(3) d^(2) hybridisation (iii) dsp^(2) hybridisation (iv) sp^(3)d^(3) hybridisation (b) Why H_(2)O is liquid while H_(2)S is gas (c ) Why KHF_(2) exists but KHCI_(2) does not (d) Benzene ring contains alternate single and double bonds yet all the C-C bonds are of equal lenght why (e) Out of P-F,CI-F,S-F and F-F bonds, which bond is the least ionic? .

    At room temperature , H_(2)O is liquid while H_(2)S is a gas . The reason is

    Statement-1 : H_(2)O is liquid whereas H_(2)S is gas . and Statement-2 : Oxygen is more electronegative than sulphur .

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