Paper 2 Chemistry

During the process of fractional distillation, the petroleum compounds are separated according to the difference in their _______________.

• boiling point
• density
• unsaturation
• mass

Which of the following compounds is an example of hydrocarbon?

• CO₂
• C₂H₆
• C₂H₅OH
• CH₃COOH

Which of these would help us to conserve natural resources? Select three answers.

• Recycling paper from newspapers

• Using fuels made from sugar rather than fossil fuels

• Putting rubbish in a landfill

• Passing down clothes from older children to younger children

• Using cheap metals like steel rather than titanium

Chemicals used to sterilize water after filtration include...? Select all correct answers.

• Chlorine

• Carbon dioxide

• Oxygen

• Ozone

• Salt

In an exothermic reaction the products have

• more energy than the reactants
• the same energy as the reactants
• less energy than the reactants
• no energy

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

At what time the reaction reached equilibrium?

• t₁
• t₂
• t₃
• t₄

Why don't all collisions between particles cause a reaction?

• the particles also need to collide with a catalyst
• not all the particles collide with enough energy
• not all the particles collide at a high enough temperature
• the particles need to collide with each other twice

Tags

NGSS.HS-PS1-5

Cracking.....

• Breaks larger hydrocarbons into smaller hydrocarbons
• Separates hydrocarbons based on their length
• Detects alkenes

What do Rates of Reactions depend on?

• Temperature

• Concentration

• Pressure

• Surface Area

• Catalyst

What happens to a Reversible Reaction when you increase the Temperature?

• It Favours the Endothermic Reaction

• It Favours the Exothermic Reaction