Mock stuff

Question 1

What are the conditions needed for the reaction of an alkene with hydrogen

Answer 1

60°C , nickel catalyst

Question 2

What are the conditions needed for the reaction of an alkene with water?

Answer 2

450°C , High pressure , Phosphoric catalyst

Question 3

What will happen to the equilibrium if I increase the temperature?

Answer 3

Endothermic reaction will take in excess heat

Question 4

What will happen to the equilibrium if I decrease the temperature?

Answer 4

Exothermic reaction will release heat to restore the equilibrium

Question 5

What will happen to the equilibrium if I increase pressure?

Answer 5

Equilibrium will shift to the side with fewer moles

Question 6

What will happen to the equilibrium if I decrease pressure?

Answer 6

Equilibrium will shift to the side with more moles

Question 7

What will happen to the equilibrium if I increase concentration of the products?

Answer 7

Equilibrium will shift to the side with more reactants

Question 8

What will happen to the equilibrium if I decrease concentration of the products?

Answer 8

Equilibrium will shift more to the side of the products

Question 9

What is a catalyst?

Answer 9

Speeds up the rate of reaction by providing an alternate pathway which requires less activation energy

Question 10

What is the term ‘equilibrium’?

Answer 10

The rate of the forwards reaction is equal to the rate of the backwards reaction in a closed system

Question 11

• What 2 functional groups are needed to make a polyester?
• What is the process called?

Answer 11

• hydroxyl groups (-OH) and carboxylic groups (-COOH)
• Condensation polymerisation

Question 12

Predict and explain (using collision theory) the effect of increasing concentration?

Answer 12

• Increases the amount of particles in a given volume
• More frequent collisions ⇒ more successful collisions
• Increases rate of reaction

Question 13

Predict and explain (using collision theory) the effect of increasing temperature?

Answer 13

• Particles have more kinetic energy ⇒ vibrate more
• Particles have more energy ⇒ more frequent and successful collisions
• Increase rate of reaction

Question 14

Predict and explain (using collision theory) the effect using a catalyst?

Answer 14

• Using a catalyst provides an alternative pathway for the reaction ⇒ requires lower activation energy
• More successful collisions
• Speeds up the rate of reaction without using up the catalyst

Question 15

Give one example of an ester

Answer 15

Ethyl ethanoate

Question 16

What are the conditions required for the fermentation of yeast

Answer 16

25°C , sugars dissolved in water and mixed with yeast

Question 17

Why are carboxylic acid weak? (in terms of ionisation and pH)

Answer 17

• Only partly ionise in solution
• Their solutions do not contain as many H+ ions compared to stronger acids
• Have a higher pH