Which of the following element is the second most abundant element on the earth's crust and is present in nature. It is a very important component of ceramics, glass and cement?
A. Germanium
B. Silicon
C. Tin
D. Lead
Answer: Option B
A. Germanium
B. Silicon
C. Tin
D. Lead
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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