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A. Oxygen
B. Carbon di oxide
C. Nitrogen
D. Hydrogen

A. Hydrogen
B. Helium
C. Carbondioxide
D. Hydrogen sulfide

A. Oxygen
B. Hydrogen
C. Carbon die oxide
D. Potassium

A. Carbon dioxide
B. Carbon monoxide
C. Nitrous oxide monoxide
D. Nitrogen peroxide
E. None of above

A. Carbohydrates
B. Proteins
C. Fats
D. Water

A. Hydrogen
B. Sulphur
C. Chlorine
D. Nitrogen

A. 100°C
B. 110°C
C. 120°C
D. 200°C

A. Mechanical
B. Electrical
C. Chemical
D. Solar

A. Argon
B. Neon
C. Helium
D. Carbondioxide

A. Nitron
B. Neon
C. Ammonia
D. Methane