A. Cigarette smoking
B. Using alcholo
C. Injection of heroine
D. Taking too much aspirin
E. None of these
A. Cosmetology
B. Chorology
C. Osteology
D. Mycology
A. 11% Oxygen approximately
B. 21% Oxygen approximately
C. 31% Oxygen approximately
D. None of these
Night vision is possible with the help of ___________?
A. Red light
B. Violet light
C. Infrared Rays
D. Ultra violet Light
E. None of these
The property of a substance to absorb moisture from the air on exposure is called____________?
A. osmosis
B. deliquescence
C. efflorescence
D. desiccation
A. 38% Nitrogen
B. 58% Nitrogen
C. 78% Nitrogen
D. None of these
A. Iron, Zinc and Titanium
B. Iron and Tin
C. Iron, Brass and Tin
D. Copper, Tin and Zinc
Modified gunmetal contains lead in addition to the zinc; it is typically composed of 86% copper, 9.5% tin, 2.5% lead, and 2% zinc. It is used for gears and bearings.