Indian army has published the notification for SSC Tech 56 men and SSC Tech 27 women for the course commencing at OTA Chennai from April 2021
The term Biomagnification’s is referred to as
increase in the body weight
uncontrolled growth of harmful organisms
accumulation of increasing amount of non-degradable pollutant through food chain
increase in the number of bacteria in a culture medium.
Which one of the following statements about air pollution caused by diesel engines is correct?
It produces large quantity of carbon monoxide at lower and high temperatures
It produces huge quantity of nitrogen oxides at lower and high temperatures
It produces large quantity of carbon monoxide at lower temperature and nitrogen oxides at high temperature
it produces large quantity of nitro gen oxides at lower temperature and carbon monoxide at high temperature
Which one of the following is a major effect of long-term consumption of drinking water containing little (less than 0.5 ppm) or no fluoride?
Cavity of tooth
Erosion of nail
Deformation of bone
Mottling of tooth
Carborundum is used as an abrasive, because it
has high thermal conductivity
has low coefficient of expansion
has high chemical stability
is extremely hard
Which one of the following is NOT decomposed by bacterial action?
Vegetable remains
Plastic materials
Animal carcasses
Wastes of flowers
