UNIT C3 REVISION

Chemistry Quiz

What are the two main uses for salt?

A: Add colour and flavourB: Preservative and flavourC: Preservative and colourD:Preservative and catalyst

Why is salt ideal for helping cars grip the road?

A: Salt has a lower freezing point than waterB: Salt has a higher freezing point than waterC: Dries the tyres of carsD: It just does

Why is Fish stored in salt

A: keeps the fish fresh (preserves it)B: makes the fish taste betterC: dries out the fishD: stops the fish from smelling

Why is a high-salt diet considered to be a high risk?

A: lowers blood pressureB: raises blood pressureC: makes people fatterD: cause problems with vital organs

What happens to litmus paper if you put it in an Alkali substance?

A: It does nothingB: It dissolvesC:It turns pink in colourD: it turns blue in colour

What is a solution called it is not acidic and not alkali?

A:NeutralB: pH7C: An Avogadro's constantD:Neutralised substance

Which of these is NOT a use for alkalis?

A: making glassB: neutralising soilC: vinegarD: making soap

What is formed when a metal hydroxide is reacted with hydrochloric acid (HCl)?

A: Metal chloride + hydrogenB: Metal oxide + water + chlorineC: Metal chloride+ waterD: Metal oxide + hydrogen

What is sodium hydroxide’s molecular formula?

A: NaClB: NaOHC: HNaD: SHO

Why is chlorine put in water?

A: Purifies the waterB: makes it clearC: makes it less acidicD: makes it less alkali

What is brine solution?

A: Water and calcium chlorideB: Water and sodium chlorideC: Water and brine shrimpD: Water and Hydrochloric acid

What is electrolysis?

A: electricity passing through molten salt, or a salt solution

B: the mixing of Brine solution and waterC: a procedure in a hospitals that sends

electrical currents through parts of the brainD: extracting hydrogen from brine solution

What do plasticisers do?

A: make plasticsB: make plastics softer and more flexibleC: stiffens plasticsD: makes plastics flame-proof

What is plasticised PVC used for?

A: Fake leather and wire coversB: Doors and window framesC: Pipes and guttersD: computer parts and machinery

How much of PVC produced is use by the building industry?

A: two thirdsB: halfC: QuarterD: none

Where do positive ions go in electrolysis?

A: the airB: the solutionC: cathodeD:anode

Where do negative ions go in electrolysis?

A: AnodeB: CathodeC: the airD: the solution

What is the raw material for polymers?

A: castor oilB: cooking oilC: crude oilD: Bitumen

What happens to an acidic solution when it is mixed with alkali?

A: it gets more alkaliB: it neutralisesC: it changes colourD: no change

Which of the following materials is made form plants?

A: leatherB: cottonC: lithiumD: Mr McDermott

Answers

B, A, A, B, D, A, C, C, B, A, B, A, B, A, A, C, A, C, B and B