Q.

Correct statements are

(A) Second most abundant  element in atmosphere is Oxygen

(B) 0.03 - 0.1 % of sulphur is present in earth's crust

(C) Selenides & tellurides are impurities present in phosphide ores

(D) O , S , Se , Te  are called pnicogens

 

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a

All

b

A , B only

c

A , B , D only

d

A , C , D only

answer is B.

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Detailed Solution

Selenides and Tellurides are present as impurities in Sulphide ores.

O , S , Se , Te  are called chalcogens.

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