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A-level Chemistry Year 1

A-level Chemistry Year 1

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The

dot-and-cross diagram below represents the electronic structure of a sulfur

hexafluoride molecule

Correct statements about sulfur hexafluoride include:

All
S-F bonds are equivalent (the same)
SF₆
is a polar molecule
SF₆
is a planar molecule

and 3 correct

only correct

and 2 correct

2 & 3 correct

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Which one of the following statements refers to hydrogen bonds

Intermolecular force that exists between the permanent dipoles in different polar molecules

Intermolecular force that exists between the lone pair of electrons on an N, O or F atom on one molecule and an electron deficient H atom bonded to an N, O or F atom on a neighbouring molecule

Intermolecular force that exists between all molecules, whether polar or non-polar

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What type(s) of force exist between the molecules in beryllium chloride, BeCl₂?

Induced dipole-dipole interactions and permanent dipole-dipole interactions only

This substance does not contain molecules

Induced dipole-dipole interactions, permanent dipole-dipole interactions and hydrogen bonds

Induced dipole-dipole interactions only

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Which of the following substances would have the lowest melting point

MgO

AlN

NaCl