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Which of the following is an exothermic ...

Which of the following is an exothermic compound?

A

`SbH_(3)`

B

`AsH_(3)`

C

`PH_(3)`

D

`NH_(3)`

Text Solution

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The correct Answer is:
4
The thermal stability of the hydrides decreases as we move from `NH_(3)` to `BiH_(3)` on account of the decrease of `E-H` bond strength.
Only `NH_(3)` has negative `Delta_(f)H^(Ɵ)` whilst all other hydrides have positive `Delta_(f)H^(Ɵ)`
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R SHARMA-THE P BLOCK ELEMENTS-QUESTION BANK
  1. Which of the following hydries has the highest dipole moments?

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  2. The species CO, CN^(-),and NO^(+) which are isoelectronic with N(2), a...

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  3. Which of the following is an exothermic compound?

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  4. Combustion of hydrazine produces

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  5. Which of the following reactions are feasible for hydrazine?

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  6. Which of the following is correct for the azide (N(3)^(-)) ion?

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  7. The reaction between urea and nitrous acid produces

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  8. Which of the following nitrides exist as giant molecules?

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  9. Which of the following gases is evolved when urea is heated with NaOH?

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  10. NH(4)CI is used to clean metal surface because

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  11. In quantitative ananlysis ,ammonia is used to separate

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  12. which of the following reaction gives reasonably pure NO?

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  13. Which of the following allotropes of phosphorus is used in the manufac...

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  14. Yellow ammonium sulphide is obtained by passing H(2)S into

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  15. KIO(3) reacts with SO(2) in an acidic medium to produce.

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  16. The main source of iodine is

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  17. Silica reacts with HF to produce

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  18. Which of the following is the only exothermic oxide of chlorine?

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  19. Which of the following is not coloured?

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  20. which of the following statement is incorrect regarding the chloride d...

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