GCSE AQA Chemistry Paper 2 (1)

Why does a higher concentration increase the rate of reaction?

• It lowers the activation energy

• It increases the frequency of collision

• 
  It increases the energy of reactant particles

• 
  It increases the amount of reactants

Which factors increase the rate of a reaction?

• Increasing temperature

• Increasing concentration

• Increasing total surface area

• All of these

Which TWO statements are correct when the reaction reaches equilibrium?

• The forward reaction and reverse reaction are both exothermic.

• The gases have escaped from the container.

• The hydrogen no longer reacts with iodine.

• The mass of each substance does not change.

• The rates of the forward reaction and reverse reaction are equal.

Which of the following is false about a catalyst?

• increases the rate of reaction

• does not alter the products of the reaction

• is not chemically or used up at the end of the reaction

• affects the equilibrium

Name the type of reaction that transfers energy from reactants to the environment.

Which of the factors will NOT shift a reaction in equilibrium?

• Volume

• Concentration

• Pressure

• Surface area

What name is given to the minimum amount of energy needed by particles for them to react when they collide?

• Activation energy

• Catalytic energy

• Threshold energy

• Collision energy

What is the general formula for alkanes?

• C_nH_2n+2

• C_nH_n+2

• C_2nH_2n+2

• C_nH_3n+2

Which alkane has the structure shown in the image?

• Methane

• Propane

• Ethane

• Butane

Why are alkanes saturated hydrocarbons?

• they are compounds containing carbon and oxygen

• joined by C-C double bonds

• they are compounds containing oxygen and hydrogen

• the carbon atoms are joined by C-C single bonds