Question

The incorrect order of decreasing boiling points (1) NH3> AsH3 > PH2 (2) H2O> H2Se> H2S (3) Br2> Cl2> F2 (4) CH4 > GeH4 > SiH4

Answer 1

Answer:

(4)

Explanation:

In carbon family hydride the interaction is London or dispersion forces.

Or the easy answer is based on molecular size, which very low for methane.

The correct order is GeH4>SiH4>CH4

Answer 2

Answer:

Incorrect order of boiling point is CH₄>GeH₄>SiH₄.

Explanation:

• In the hydrides of group 14, there is increase in the boiling point with rise in strength of Vander Waal's force of attraction.
• Vander Waal's forces grows with increase in molecular mass. Down the group, mass increases.  

• The correct order is SiH₄>GeH₄>CH₄

Therefore, the order given in option 4 is incorrect.