Quiz on Gases and Structure & Bonding

What is the approximate percentage of nitrogen in the Earth's atmosphere?

• 78%

• 21%

• 90%

• 1%

The products of the thermal decomposition of copper(II) carbonate are.....

• copper(II) oxide and water

• copper(II) hydroxide and carbon dioxide

• copper(II) oxide and carbon dioxide

• copper and carbon dioxide

A student places a glowing splint into a test tube containing a gas. The splint relights. Which gas is present in the test tube?

• Hydrogen

• Carbon dioxide

• Nitrogen

• Oxygen

What is produced when hydrogen undergoes a combustion reaction in air?

• carbon dioxide and water

• water only

• carbon dioxide only

• oxygen only

Which of the following statements about carbon dioxide is NOT true?

• Carbon dioxide is a greenhouse gas.

• The percentage of carbon dioxide in the Earth's atmosphere is around 0.04%

• carbon dioxide is formed when metal carbonates decompose

• Carbon dioxide turns limewater colourless

What type of bond is formed when two hydrogen atoms form a molecule?

• An ionic bond

• A compound bond

• A metallic bond

• A covalent bond

What type of structure does graphite have?

• Giant covalent

• Simple molecular

• Giant ionic lattice

• Giant metallic lattice

Beryllium is in Group 2 of the Periodic Table. What is the charge on a beryllium ion in an ionic compound?

• 2-

• 1-

• 1+

• 2+

True or False? 'Simple molecular substances are generally good conductors of electricity.'

• True

• False

In substances containing small molecules....

• the intermolecular forces are much stronger than the covalent bonds within the molecules.

• the covalent bonds within the molecules are much stronger than the intermolecular forces.

• the covalent bonds within the molecules are the same strength as the intermolecular forces.