Coagulation is a process which removes _______ from water.
- (A) Bacteria
- (B) Salts
- (C) Dirt
- (D) Carbon dioxide
- (C) Dirt
Which of the following is the most commonly used chemical for coagulation?
- (A) Sulfur oxide
- (B) Aluminum sulfate
- (C) Nitrous oxide
- (D) Silicon dioxide
- (B) Aluminum sulfate
Which of the following is not a noble gas?
- (A) Krypton
- (B) Xenon
- (C) Ozone
- (D) Radon
- (C) Ozone
The antibiotic penicillin is obtained from:
- (A) Bacteria
- (B) Fungus
- (C) Virus
- (D) Plasmid
- (B) Fungus
Which of the following resists the flow of current?
- (A) Resistor
- (B) Transistor
- (C) Capacitor
- (D) None of these
- (A) Resistor
If xylem vessels are damaged the leaves would not be able to:
- (A) Get food
- (B) Deliver food
- (C) Get water
- (D) Deliver water
- (C) Get water
Electric Generator is a device that converts:
- (A) Mechanical energy into electrical energy
- (B) Thermal energy into electrical energy
- (C) Chemical energy into electrical energy
- (D) Heat energy into electrical energy
- (A) Mechanical energy into electrical energy
What is the boiling point of water in kelvins?
- (A) 373 K
- (B) 100 K
- (C) 100 K
- (D) 212 K
- (A) 373 K
The freezing point of water on the kelvin scale is:
- (A) 73.15 K
- (B) 173.15 K
- (C) 273.15 K
- (D) 373.15 K
- (C) 273.15 K
These are good pollinators of flower:
- (A) Fertilizers
- (B) Moths
- (C) Worms
- (D) Grass hoppers
- (B) Moths