Chemistry Worksheet - Multiple Choice Questions

Which conditions cause gas particles to move the fastest and the furthest apart?

• A high | high

• B low | high

• C high | low

• D low | low

Which statement describes a liquid at room temperature?

• A sample of a liquid has a fixed volume and shape.

• A sample of a liquid does not have a fixed volume or shape.

• The particles are touching but can move by sliding over each other.

• The particles spread out and fill all available space.

A compound, X, has a melting point of 71°C and a boiling point of 375°C. Which statement about X is correct?

• It is a liquid at 52°C and a gas at 175°C.

• It is a liquid at 69°C and a gas at 380°C.

• It is a liquid at 75°C and a gas at 350°C.

• It is a liquid at 80°C and a gas at 400°C.

What is the nucleon number of an atom?

• the number of neutrons

• the number of protons

• the total number of protons and neutrons

• the total number of protons and electrons

An atom has three electron shells. There are three electrons in the outer shell. How many protons and how many neutrons are in this atom?

• A 13 | 14

• B 13 | 27

• C 14 | 13

• D 21 | 24

Which row gives the number of covalent bonds in one molecule of ammonia and in one molecule of hydrogen chloride?

• A 3 | 1

• B 3 | 2

• C 4 | 1

• D 4 | 2

Which statements about the structure and bonding in diamond are correct?

• 1 Each carbon atom in diamond is bonded to three other carbon atoms only.

• 2 Diamond contains many strong covalent bonds.

• 3 Diamond contains layers of carbon atoms, which can slide over each other.

• 4 Diamond has a giant structure.

Magnesium burns in oxygen to form magnesium oxide. The equation for the reaction is shown. 2Mg + O₂ → 2MgO Which mass of magnesium oxide is formed when 48 g of magnesium is burned?

• 20 g

• 40 g

• 80 g

• 160 g

Propane, C3H8, is burned in a limited amount of oxygen. Which equation represents this reaction?

• C3H8 + 5O2 → 3CO2 + 4H2O

• C3H8 + 4O2 → 3CO + 4H2O

• C3H8 + 4O2 → 3CO2 + 2H2O + 2H2

• 2C3H8 + 7O2 → 6CO + 8H2O

The isotope of which element is used to define the relative atomic mass of other elements?

• sulfur

• oxygen

• nitrogen

• carbon