Which two are examples of oxidising agents?
Acidified Potassium Manganate(VII)
Aqueous Potassium Iodide
Anhydrous Calcium Chloride
Concentrated Sulphuric Acid
Acidified Potassium Dichromate(VI)
What is the colour change for the oxidising agent Acidified Potassium Manganate(VII)?
(purple to colourless)
(orange to green)
(green to orange)
(white to blue)
Copper(II) chloride and copper(II) carbonate are blue
What temperature is optimum for enzymes in yeast in fermentation? (degrees Celsius)
37
60
62
20
35
What is a bung used for in fermentation?
let Carbon Dioxide out and prevent entry of Oxygen
let Oxygen out and prevent entry of Carbon Dioxide
Tick all reasons why the fermentation reaction might stop.
An excess in conc. of alcohol
The yeast dies
Glucose finishes up
Nepal earthquake
What might you use to cool the gases in fractional distillation by absorbing heat from them
Condenser
Glass beads
Liquifying column
Copper wire
Which indicator is yellow at a low pH and blue at a high pH?
Universal Indicator
Methyl Orange
Phenolphtalein
Bromothymol
What is the colour change when testing for water with Anhydrous Cobalt(II) Chloride
white to blue
blue to pink
pink to green
blue to colourless
Complete the equation: Acid + Carbonate →
Salt + Water + Carbon Dioxide
Salt + Carbon Dioxide
Salt + Water + Carbon
Water + Carbon Dioxide
Complete the equation: Acid + Alcohol →
Ester + Water
Ester + Hyrdogen
Alkene + Hydrogen
Alkene + Water
