TLV of ozone (O3) and phosgene (COCl2) in air is _______________ ppm?
TLV of ozone (O3) and phosgene (COCl2) in air is _______________ ppm?
A. 0.1
B. 25
C. 100
D. 1000
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Siderosis is a disease caused by the inhalation of ______________ dust?
Siderosis is a disease caused by the inhalation of ______________ dust?A. Coal
B. Silica
C. Iron
D. None of theseWhich of the following gases is having the widest explosion limit (about 2 to 81% gas in gasair mixture), rendering it the property of the most explosive gas ?
Which of the following gases is having the widest explosion limit (about 2 to 81% gas in gasair mixture), rendering it the property of the most explosive gas ?A. Hydrogen
B. Acetylene
C. Carbon monoxide
D. AmmoniaDisinfection of water is done to remove ______________________?
Disinfection of water is done to remove ______________________?A. Color
B. Bad taste
C. Foul odour
D. BacteriaGreen house effect is accentuated by________________?
Green house effect is accentuated by________________?A. Deforestation
B. Rapid industrialisation
C. Increased transportation activity
D. All A., B. and C.Foul odour and bad taste of water is removed by treating with__________________?
Foul odour and bad taste of water is removed by treating with__________________?A. Alum
B. Bleaching powder
C. Activated carbon
D. Copper sulphateOut of the following, TLV of _______________ is maximum (about 500 ppm)?
Out of the following, TLV of _______________ is maximum (about 500 ppm)?A. Carbon dioxide
B. Toluene
C. Carbon disulphide
D. Acetaldehyde