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The decreasing order of the boiling poin...

The decreasing order of the boiling points of the following hydrides
(i) `NH_3` (ii) `PH_3`
(iii) `AsH_3` (iv) `SbH_3`
(v) `H_2O` is

A

`(v) gt (iv) gt (i) gt (iii) gt (ii)`

B

`(v) gt (i) gt (ii) gt (iii) gt (iv)`

C

`(ii) gt (iv) gt (iii) gt (i) gt (v)`

D

`(iv) gt (iii) gt (i) gt (ii) gt (v)`

Text Solution

Verified by Experts

The correct Answer is:
A
`H_2O` has the highest boiling point on account of hydrogen bonding while `PH_3` has the lowest boiling point on account of lowest molecular mass and absence of `H-` bonding. This confirms the answer. `SbH_3` has the 2nd highest boiling point on account of high molecular mass. `NH_3` has higher boiling point than `AsH_3` on account of hydrogen bonding.
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The decreasing order of boiling points of the following is : (I) RCOCl (II) (RCO)_2O (III) RCONH_2 (IV) RCOOH .

Arrange the following in the increasing order of the properties stated against them. (a) (i) NH_(3) , (ii) PH_(3) , (iii) AsH_(3) , (iv) SbH_(3) -boiling point. (b)(i) Bi^(3+) ,(ii) Sb^(3+) , (iii) As^(3+) -stability of +3 oxidation state. ( c)(i) NH_(3) , (ii) PH_(3) , (iii) AsH_(3) , (iv) SbH_(3) , (v) BiH_(3) -reducing character.

Knowledge Check

  • The decreasing nucleophilic order of the following compounds is: i. NH_(3) , ii. PH_(3) , iii. AsH_(3) , iv. SbH_(3)

    A
    `(i) gt (ii) gt (iii) gt (iv)`
    B
    `(iv) gt (iii) gt (ii) gt (i)`
    C
    `(ii) gt (i) gt (iii) gt (iv)`
    D
    `(ii) gt (i) gt (iv) gt (iii)`

  • The decreasing nucelophilic order of the following compounds is: i. NH_(3) , ii. PH_(3) , iii. AsH_(3) , iv. SbH_(3)

    A
    `(i) gt (ii) gt (iii) gt (iv)`
    B
    `(iv) gt (iii) gt (ii) gt (i)`
    C
    `(ii) gt (i) gt (iii) gt (iv)`
    D
    `(ii) gt (i) gt (iv) gt (iii)`

  • The decreasing order of the basic character of the following is : (I) F^(Ө) (II) NO_3^(Ө) (III) H_2 O (IV) CH_3 OH .

    A
    `(II) gt (I) gt (IV) gt (III)`
    B
    `(III) gt (IV) gt (I) gt (II)`
    C
    `(I) gt (II) gt (III) gt (IV)`
    D
    `(IV) gt (III) gt (II) gt (I)`

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