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(A): Thermal stability of the hydrides o...

(A): Thermal stability of the hydrides of VIA group elements decreases from `H_(2)O to `H_(2)Po`
(R): The heats of dissociation of M-H bond of hydrides of VIA group decreases down the group 

A

Both (A) and (R ) are true and (R ) is the correct explanation of (A)

B

Both (A) and (R ) are true and (R ) is not the correct explanation of (A)

C

(A) is true but (R ) is false

D

(A) is false but (R ) is true

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The correct Answer is:
A
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(A) Thermal stability of the hydrides of VIA group elements decreases from H_(2) O to H_(2) Po (R ) The heats of disociation of M-H bond of hydrides of VIA group decreases down the group

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Write the order of thermal stability of the hydrides of group 16 elements.

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(A) Thermal stability of 16 ^(th) group hydrides decreases from H _(2) O to H_(2) PO (R ) From H _(2)O to H_(2)PO bond dissociation energy increases.

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AAKASH SERIES-VIA GROUP ELEMENTS-LEVEL-I (EXERCISE)
  1. Which is non poisonous hydride ?

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  2. Sulphur uses ...... orbitals for bonding in H(2)S

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  3. (A): Thermal stability of the hydrides of VIA group elements decreases...

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  4. A stronger reducing agent is

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  5. Correct decreasing order of volatility is

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  6. The most acidic and thermally stable hydride of chalcogens are respect...

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  7. In the hydrides of VIA elements largest bond angle and bond length is ...

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  8. The effect of repulsion between the two lone pairs of electrons presen...

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  9. Which of the following is a weakest acid in its aqueous solution ?

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  10. Which of the following is least covalent hydride?

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  11. The bond angle in H(2)S is

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  12. Among the following, the weakest conjugate base is

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  13. The geometry of H(2)S and its dipole moment are

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  14. In the hydrides of VI A group elements, the acidic strength gradually ...

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  15. Oxygen is more electronegative than sulphur, yet H(2)S is acidic while...

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  16. In which of the following bond angle can not be explained by Valence B...

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  17. The element of VI A group which cannot form hexahalides is

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  18. When sulphur is treated with F(2), the main product formed is

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  19. The hybridization of Sin SF(4) is

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  20. Which of the following is foul smelling red liquid

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