The source of the Sun’s energy is the process of ____________?
A. Photoelectric emission
B. Nuclear fission
C. Nuclear fusion
D. Thermionic emission
Chemistry Mcqs
The snow on the mountains does NOT melt all at once when it is heated by the sun because:
The snow on the mountains does NOT melt all at once when it is heated by the sun because:
A. it becomes very hard
B. it reflects most of the heat from the sun
C. it has a low specific heat capacity
D. it has a high latent heat of fusion
Optic fibres are used in :
Optic fibres are used in :
A. CAT scans
B. X-ray photos
C. Ultrasound scans
D. Endoscopy
The radio-active element used in heart pacemakers is ___________?
The radio-active element used in heart pacemakers is ___________?
A. Uranium
B. Deuterium
C. Plutonium
D. Radium
Where does the oxygen that keeps us alive come from?
Where does the oxygen that keeps us alive come from?
A. Carbon dioxide
B. Carbonates absorbed from soil
C. Oxides of minerals
D. Water
What is the name of that system, which uses radioactivity to decide the period of materials of-pre-historic period ?
What is the name of that system, which uses radioactivity to decide the period of materials of-pre-historic period ?
A. Radium dating
B. Uranium dating
C. Carbon dating
D. Deuterium dating
Soap is prepared by boiling caustic soda with ___________?
Soap is prepared by boiling caustic soda with ___________?
A. Alcohol
B. Kerosene oil
C. Glycerine
D. Fats
Milk tastes sour when kept in the open for sometime due to the formation of __________?
Milk tastes sour when kept in the open for sometime due to the formation of __________?
A. lactic acid
B. citric acid
C. acetic acid
D. carbonic acid
Who discovered carbohydrates fats and proteins?
Who discovered carbohydrates fats and proteins?
A. William Prout
B. Jons Jacob Berzelius
C. Anselme Payen
D. Walter Bradford Cannon
Hookworm is a parasitic worm that infects ______?
Hookworm is a parasitic worm that infects ______?
A. large intestine
B. liver
C. lungs
D. small intestine