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.
Which hydrocarbon does NOT exhibit structural isomerism?
C3H6
C4H6
C4H8
C4H10
C5H12
Correct answer is A
Alkenes that show structural isomerism are those with 4 carbons and above.
What is formed when starch is completely hydrolysed?
fructose
glucose
lactose
maltose
sucrose
Correct answer is B
No explanation has been provided for this answer.
CH4
C2H6
C3H6
C3H8
C6H6
Correct answer is C
No explanation has been provided for this answer.