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.
400 cm3
625 cm3
1000 cm3
1600 cm 3
Correct answer is B
Conc. g/dm3 = 0.20 x 40 gmol -1 = 8 g/dm3
1000 cm3 of 0.20m NaOH contains 8g of NaOH :. 5g of NaOH will be contained in 5/8 x 1000 x 625cm3