cystallization
hydrolysis
sublimation
filtration
chromatography
Correct answer is E
No explanation has been provided for this answer.
SO2 (g) + FeS (s)
SO3 (g) +FeS(s)
SO2 (g) + SO3(g)
SO2 (g) + H2S (g)
SO3(g) + H2S(g)
Correct answer is C
No explanation has been provided for this answer.
5. 20
11. 20
2. 24
20. 20
6. 20
Correct answer is B
P4 + 502 → P4O10
for the complete combustion of 124 grammes of phosphorus we need
5 x 22.4 litres of O2
for 12.4 gms of P4 we need
\(\frac{5 \times 22.4}{124} \times \frac{12.4}{1}\)
\(\frac{22.4}{2}\) = 11.2 litres
copper, zinc and nickel
aluminium and copper
copper and zinc
tin and zinc
tin and copper
Correct answer is E
No explanation has been provided for this answer.
Two metallic ions associated with hard water are
copper and zinc
magnesium and silver
calcium and magnesium
potassium and tin
sodium and lead
Correct answer is C
No explanation has been provided for this answer.