Chemistry 2211 Spring 2021 Quiz #4 - University of South ...
Chemistry Quiz
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Transcript of Chemistry Quiz
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