A common characteristic between zinc and the other transition elements is the ability to
have variable oxidation states
from complex ions
act as a catalyst
from coloured ions
Correct answer is B
No explanation has been provided for this answer.
The purest form of iron which contains only about 0.1% carbon is
pig iron
wrought iron
cast iron
iron pyrite
Correct answer is B
No explanation has been provided for this answer.
Which of the following compounds will burn with a brick-red colour in a non-luminous Bunsen flame?
LiCI
NaCl
CaCl2
MgCl2
Correct answer is C
No explanation has been provided for this answer.
Mineral acids are usually added to commercial hydrogen peroxide to
oxidize it
decompose it
minimize its decomposition
reduce it to water and oxygen
Correct answer is C
No explanation has been provided for this answer.
Commercial bleaching can be carried out using
sulphur (IV) oxide and ammonia
hydrogen sulphide and chlorine
chlorine and sulphur (IV) oxide
ammonia and chlorine
Correct answer is C
No explanation has been provided for this answer.