9701/13

Chemistry 9701/13May/June 2018

Cambridge AS Level · Multiple Choice (AS Level) · answer key with instant marking and worked solutions

40
questions
40
marks
60
minutes

Topics Introduction to Organic Chemistry · Atoms, Molecules and Stoichiometry · Chemical Bonding · Equilibria · Halogen Compounds · Carbonyl Compounds · +16 more

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Q11MChemical BondingFree sample

Why is the boiling point of ammonia, NH3\text{NH}_3, higher than the boiling point of phosphine, PH3\text{PH}_3?

Options

A   Ammonia molecules are polar; phosphine molecules are not.
B   Ammonia molecules have significant hydrogen bonding; phosphine molecules do not.
C   N–H covalent bonds are stronger than P–H covalent bonds.
D   There is one lone pair in each ammonia molecule but no lone pair in each phosphine molecule.

The rest of this paper

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  • Q7Chemical Energetics1M
  • Q8Electrochemistry1M
  • Q9Equilibria1M
  • Q10Equilibria1M
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