Which has the highest boiling point? Ar Kr Xe Ne Which substance has the highest

Question

Which has the highest boiling point? Ar Kr Xe Ne Which substance has the highest boiling point? CH_4 He HF Cl_2 Consider the phase diagram of a pure compound. Which statement applies? The path A rightarrow C represents sublimation. Following the path A rightarrow B rightarrow C the compound would first liquefy and then vaporize. If the compound is in state A, continued reduction of the pressure (at temperature) will cause it to melt. None of these statements is correct. Calculate Delta H for the gas phase reaction: NH_3(g) + Cl_2(g) rightarrow NH_2Cl (g) + HCl (g) Delta H= ? -337 kJ +337 kJ -84 kJ 0 kJ

Explanation / Answer

21

noble gases are nuetral atoms it cant form any ions

since these are nuetral there can be only wanderwall interactions possible

we know the basic concept with increase of size wanderwall interactions will increases

in the group from top to bottom size of the atoms will increases

so with size boiling point also increases

so answer is Xe

option C is correct answer

2.

in the given options

HF is the only polar molecule rest all are nuetral atoms

so nuetral atoms only can have wanderwall interactions

but HF can have hydrogen bonding interactions which are much stronger than wanderwall interactions

so answer is

option C

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