Question

பின்வரும் சேர்மங்களில் எதனை "Blue John" என அழைக்கிறோம் ?
(அ) Cas(PO), (ஆ) Ca0 (இ) CaH, (ஈ)caF2
Which compound is named as "Blue John" among the following compou
(a) Ca;(PO)2 (5) Ca0 (c)CaH2(d)caF2

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Answer 1

option A may be correct

Answer 2

d option is correct

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