Which of the following processes will pollute water?
Exposure of a body of water ultraviolet rays
Discharge of industrial effluents effluents into water ways
Passage of river water through a send bed
Addition of a measured quantity of chlorine to water
Correct answer is B
No explanation has been provided for this answer.
What are the two gases associated with the formation of acid rain?
CO2 and HCI
CO2 and N2
CO2 and NO2
HCI ans SO2
Correct answer is C
No explanation has been provided for this answer.
magnesium tetraoxosulphate (VI)
suspended solids
Organic impurities
calcium hydrogentrioxocarbonate (IV)
Correct answer is D
No explanation has been provided for this answer.
What is the main impurity in haematite?
CaSiO3
CaCO3
SiO3
Fe2O3
Correct answer is C
No explanation has been provided for this answer.
Which of the following compound is used for removing impurities from bauxite?
NaOH
CaCO3
Na3AIF6
H2SO4
Correct answer is A
No explanation has been provided for this answer.