Question 16 : Which of the following does not function as lewis acid?
Bi
N
Ar
Sb
Question 17 : Which of the following is prepared by haber process?
phosphorus
bismouthine
Ammonia
nitric acid
Question 18 : Which of the following is the most abundant uncombined element accessible to man?
N
He
O
H
Question 19 : One of these is not a raw material for the cement manufacture?
lime
alumina
silica
silicate
Question 20 : Which of the following is used as a rocket fuel?
Ammonia
,hydrazine
hydrazoic acid
phosphine
1
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2017-04-08T21:44:22-0400
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