PU1D Chemistry Quiz

Sodium sulfide, Na₂S, is a reactive yellow solid, produced when sodium and sulfur react together.

Use of the periodic table is relevant to this question.

How do the ionic radius and atomic radius of sodium compare with those of sulfur?

• A

• B

• C

• D

Which chlorides of Period 3 elements will form a neutral solution when added to water?

1) MgCl₂

2) NaCl

3) SiCl₄

• 1 only

• 1 and 2

• 2 and 3

• 1,2 and 3

What Group is Nitrogen in?

• Group 1

• Group 3

• Group 5

• Group 15

What does bond polarity influence?

• Physical property

• Chemical reactivity

• Electrical conductivity

• Solubility

The trends in three physical properties of the elements of period 3 are shown in the following graphs. Which physical property is not illustrated?

• Electrical conductivity

• Atomic radius

• Melting point

• First ionisation energy

What does the nitrification process transform ammonia (NH₃) into?

• Nitrogen gas (N₂)

• Nitrate (NO₃)

• Nitrite (NO₂)

• Nitromethane (CH₃NO₂)

If the hydrogen halogen bond is longer, what does it become and how much energy does it required to break the bond?

• It becomes stronger and will require less energy to break the bond

• It becomes weaker and will require more energy to break the bond

• It becomes weaker and will require less energy to break the bond

• It becomes stronger and will require more energy to break the bond

What is the colour of Iodine in an organic solvent?

• Brown

• Yellow

• Purple

• Dark Grey

What happens when Hydrogen reacts with Bromine?

• Reacts explosively in sunlight

• Reacts vigorously on heating

• Reacts slowly on heating

• Forms an equilibrium mixture on heating

Nitrogen is a non-polar molecule and is ________?

• Fairly unreactive

• Very reactive

• Completely unreactive

• Moderately reactive