polar, because H-O bond is polar and the molecule has a non-symmetrical shape.

non-polar, because the H-O bond is non-polar.

polar, because H-O bond is polar and there are two H-O bonds in a water molecule.

A-Level Chemistry Electronegativity and Bond Polarity

Q1.

The difference in the attraction for the pair of electrons in a covalent bond can be explained by which of the following properties? (Select the most suitable choice)

1. Relative atomic mass
2. Electronegativity
3. Reactivity

Q2.

Which of the following statements are true about Electron density?

1. Electron density is a property unique to metals.
2. Electron density relates to the probability of finding electrons at a particular position in space.
3. At positions with high electron densities, electrons are less likely to be found.
4. It can be imagined as a cloud of electrons around the nucleus.

Q3.

Water molecules are:

1. non-polar, because the H-O bond is non-polar.
2. polar, because H-O bond is polar and the molecule has a non-symmetrical shape.
3. polar, because H-O bond is polar and there are two H-O bonds in a water molecule.

Q4.

Which of the following is the result of differing attraction for the pair of electrons in a covalent bond? (Select the best choice)

1. A dipole
2. An ion
3. An isotope

Q5.

Non-polar bonds are ___________________ covalent, whereas polar bonds are ________________ .

1. sparsely, polarised
2. broken, polarised
3. perfectly, non-polarised
4. perfectly, polarised

Q6.

Which of the following shapes are symmetrical? (Select all applicable)

1. Linear
2. Non-linear
3. Trigonal pyramidal
4. Trigonal planar
5. Tetrahedral

Q7.

If a molecule has at least one polar covalent bond, the molecule will also be polar. True or false?

1. True
2. False
3. The two are unrelated.

Q8.

In a non-polar bond electrons are not shared equally. True or false?

1. True
2. False

Q9.

What shape does an ammonia (NH₃) molecule have?

1. Non-linear
2. Trigonal pyramidal
3. Tetrahedral
4. Linear

Q10.

Carbon dioxide molecules are:

1. non-polar, because C-O bond is non-polar.
2. polar, because C-O bond is polar and the molecule has a non-symmetrical shape.
3. polar, because C-O bond is polar and there are two C-O bonds in a Carbon dioxide molecule.
4. non-polar, because C-O bond is polar, but the molecule is symmetrical in shape.

A-Level Chemistry Electronegativity and Bond Polarity

Subject: Chemistry

Level: Beginner