The pH of water is 7.
What is the pH of orange juice?
7
above 10
below 2
between 5.5 and 6.5
between 7.5 and 8.5
Correct answer is D
No explanation has been provided for this answer.
Which separation technique is routinely applied in the petroleum industry?
chromatography
distillation
evaporation
fractional crystallization
fractional distillation
Correct answer is E
No explanation has been provided for this answer.
Which metal is extracted from bauxite?
aluminium
calcium
copper
magnesium
tin
Correct answer is A
No explanation has been provided for this answer.
Why is tetraoxosulphate(VI) acid NOT used for making carbon dioxide from calcium carbonate? It is
a dehydrating agent
a strong acid
an oxidising agent
dibasic
forms insoluble calcium tetraoxosulphate(Vl)
Correct answer is E
No explanation has been provided for this answer.