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Chemistry - Science GK Multiple Choice Questions and Answers for Competitive Exams

16 The natural sources of hydrocarbon is :
A Crude oil
B Biomass
C Carbohydrates
D None of these

Answer: Option [A]
17 Which among the following metals provide amphoteric oxide ?
A Sodium
B Silver
C Aluminium
D Calcium

Answer: Option [C]
18 Which among the following is pure matter ?
A Carbon-dioxide
B Brass
C Air
D Iron

Answer: Option [A]
19 Quartz is made of which of the following ?
A Calcium Sulphate
B Calcium Silicate
C Sodium Sulphate
D Sodium Silicate

Answer: Option [D]
20 Galvanised iron is made by coating iron with :
A Zinc
B Nickel
C Chromium
D Lead

Answer: Option [A]


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