Which one is known as the oil of vitriol?
A. H2SO3
B. H2SO4
C. H2S2O7
D. H2S2O5
Answer: Option B
A. H2SO3
B. H2SO4
C. H2S2O7
D. H2S2O5
Answer: Option B
Red phosphorus is less reactive than yellow phosphorus because
A. it is red in colour
B. it is highly polymerised
C. it is insoluble in C2H5OH
D. it is hard
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