UNIT C3 REVISION Chemistry Quiz

What are the two main uses for salt? A: Add colour and flavour B: Preservative and flavour C: Preservative and colour D:Preservative and catalyst

Why is salt ideal for helping cars grip the road? A: Salt has a lower freezing point than water B: Salt has a higher freezing point than water C: Dries the tyres of cars D: It just does

Why is Fish stored in salt A: keeps the fish fresh (preserves it) B: makes the fish taste better C: dries out the fish D: stops the fish from smelling

Why is a high-salt diet considered to be a high risk? A: lowers blood pressure B: raises blood pressure C: makes people fatter D: cause problems with vital organs

What happens to litmus paper if you put it in an Alkali substance? A: It does nothing B: It dissolves C:It turns pink in colour D: it turns blue in colour

What is a solution called it is not acidic and not alkali? A:Neutral B: pH7 C: An Avogadro's constant D:Neutralised substance

Which of these is NOT a use for alkalis? A: making glass B: neutralising soil C: vinegar D: making soap

What is formed when a metal hydroxide is reacted with hydrochloric acid (HCl)? A: Metal chloride + hydrogen B: Metal oxide + water + chlorine C: Metal chloride+ water D: Metal oxide + hydrogen

What is sodium hydroxide’s molecular formula? A: NaCl B: NaOH C: HNa D: SHO

Why is chlorine put in water? A: Purifies the water B: makes it clear C: makes it less acidic D: makes it less alkali

What is brine solution? A: Water and calcium chloride B: Water and sodium chloride C: Water and brine shrimp D: Water and Hydrochloric acid

What is electrolysis? A: electricity passing through molten salt, or a salt solution B: the mixing of Brine solution and water C: a procedure in a hospitals that sends electrical currents through parts of the brain D: extracting hydrogen from brine solution

What do plasticisers do? A: make plastics B: make plastics softer and more flexible C: stiffens plastics D: makes plastics flame-proof

What is plasticised PVC used for? A: Fake leather and wire covers B: Doors and window frames C: Pipes and gutters D: computer parts and machinery

How much of PVC produced is use by the building industry? A: two thirds B: half C: Quarter D: none

Where do positive ions go in electrolysis? A: the air B: the solution C: cathode D:anode

Where do negative ions go in electrolysis? A: Anode B: Cathode C: the air D: the solution

What is the raw material for polymers? A: castor oil B: cooking oil C: crude oil D: Bitumen

What happens to an acidic solution when it is mixed with alkali? A: it gets more alkali B: it neutralises C: it changes colour D: no change

Which of the following materials is made form plants? A: leather B: cotton C: lithium D: Mr McDermott

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