With reference to the mass of which atom is the molecular weight of elements measured?
- (A) Carbon
- (B) Hydrogen
- (C) Oxygen
- (D) Nitrogen
- (A) Carbon
Why is “Carbon monoxide” a pollutant?
- (A) It reacts with hemoglobin
- (B) It makes nervous system inactive
- (C) It reacts with oxygen
- (D) It inhibits glycolysis
- (A) It reacts with hemoglobin
Which of the following is known as cemetery of RBCs?
- (A) Liver
- (B) Spleen
- (C) Brain
- (D) Heart
- (B) Spleen
Charcoal is used in water treatment as:
- (A) Solvent
- (B) Absorbent
- (C) Coagulant
- (D) Adsorbent
- (D) Adsorbent
Bone is used as a fertilizer because it contains the plant nutrient:
- (A) Calcium
- (B) Phosphorus
- (C) Sodium
- (D) Nitrogen
- (B) Phosphorus
Which of these is used as controller rod in nuclear reactor?
- (A) Cadmium
- (B) Uranium
- (C) Thorium
- (D) Plutonium
- (A) Cadmium
Which gas is added to LPG to make it smell during the leakage?
- (A) Ethyl Mercaptan
- (B) Methane Mercaptan
- (C) Methyl Mercaptan
- (D) Ethane Mercaptan
- (A) Ethyl Mercaptan
The largest source of pollution in the world is:
- (A) Herbicides and Insecticides
- (B) Automobile exhausts
- (C) Sewage and garbage
- (D) Industrial effluents
- (C) Sewage and garbage
Which of the following is NOT an example of allotrope?
- (A) Diamond
- (B) Steel
- (C) Graphite
- (D) Ozone
- (B) Steel
Which drug is used as a thyroid hormone?
- (A) Metformin
- (B) Ketoconazole
- (C) Promethazine
- (D) Levothyroxine
- (D) Levothyroxine
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