Which of the following organisms releases molecular oxygen into water?
A. E.coli B. Phytoplankton C. Amoeba D. Salmonella
The process of converting wet waste to manure is___________?
A. Metabolism B. Conservation C. Incineration D. Composting
Which of the following pollutants in water causes “Minamata disease?
A. Methyl Mercury B. Lead C. Salmonella D. Perchlorate
lightest metal is__________?
A. Lithium B. Sodium C. Magnesium D. Aluminium
Which of the following is used in water purification?
A. Reverse Osmosis B. Osmosis C. Cytolysis D. Turgor Pressure
A crescograph is a device for measuring the growth in __________?
A. Micro Organism B. Plants C. Human D. Pollution
___________ is a strong smelling agent added to LPG cylinders to detect leakage?
A. Nitrogen Peroxide B. Ethyl Mercaptan C. Carbon Monoxide D. Sulphur Dioxide
Which instrument is used for viewing the sun?
A. Stroboscope B. Heliograph C. Solograph D. None of these
The heaviest man made element found so for is__________?
A. Promethium B. Ununoctium C. Francium D. Technetium
The heaviest naturally-occurring element is_________?
A. Radium B. Platinum C. Uranium D. Cadmium