100 questions - year 10

Complete the word equation: Sodium + Water -->

• Sodium Hydroxide + Hydrogen

• Sodium Chloride + Oxygen

• Sodium Bicarbonate + Carbon Dioxide

• Sodium Sulfate + Nitrogen

List the three states of matter in increasing order of particle energy.

• Gas, Liquid, Solid

• Liquid, Gas, Solid

• Solid, Liquid, Gas

• Liquid, Solid, Gas

Give the formula of ammonia gas.

• NH_{4}

• NH_{2}

• NH_{3}

• N_{2}H_{2}

Give the period number of the atom with electron configuration 2,8,7.

• 1

• 2

• 3

• 4

It provides an alternative reaction pathway with a lower activation energy

• How a catalyst works.

• By increasing the temperature of the reaction.

• By decreasing the concentration of reactants.

• By providing energy to the reactants.

Describe the melting points in simple molecular structures.

• High

• Moderate

• Low

• Very High

What is meant by the term "double covalent bond"?

• A bond where each atom is sharing two electrons (compared to sharing one each in a single bond)

• A bond formed by the transfer of electrons from one atom to another

• A bond where atoms share three electrons each

• A bond that occurs only in noble gases

Carbon dioxide causes damage to the ozone layer in the stratosphere. True or False?

• True

• False

• Partially true

• Not enough information

Complete the word equation: Chlorine + Potassium Iodide -->

• Potassium chloride + Iodine

• Sodium chloride + Iodine

• Potassium bromide + Chlorine

• Calcium iodide + Chlorine

Give another term for a displacement reaction.

• A redox reaction

• A synthesis reaction

• A decomposition reaction

• A combustion reaction