The soul of chemistry is dealing with___________?
The soul of chemistry is dealing with___________?
A. Internal structural changes in matter
B. Composition of matter
C. Properties of matter
D. Composition and properties of matter
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Which gas is used for artificial ripening of green fruit ?
Which gas is used for artificial ripening of green fruit ?A. Carbon dioxide
B. Acetylene
C. Ethane
D. EthyleneEthylene plays a vital role in the natural ripening of fruits. It is a hormone produced naturally within the fruits to stimulate ripening process. Ethylene, being a natural hormone, does not pose any health hazards to consumers, the guidance note points out.
Vitamin B3 is also known as__________?
Vitamin B3 is also known as__________?A. Thiamine
B. Riboflavin
C. Niacin
D. RetinolVitamin B3, also called niacin, is one of the eight B-complex water-soluble vitamins. Niacin has a wide range of uses in the body, helg functions in the digestive system, skin and nervous system.
The inner most part of the earth is__________?
The inner most part of the earth is__________?
A. Crust
B. Mental
C. Core
D. None of theseThe human brain uses__________ percent of the total oxygen and blood in the body?
The human brain uses__________ percent of the total oxygen and blood in the body?
A. 20
B. 12
C. 35
D. 48A moderator is used in nuclear reactor in order to ?
A moderator is used in nuclear reactor in order to ?
A. Accelerate the neutrons
B. Slow down the speed of the neutrons
C. Increase the number of elections
D. Decrease the number of electrons
E. None of theseVacuum tubes have been replaced by__________?
Vacuum tubes have been replaced by__________?
A. Conductors
B. Diodes
C. Transistors
D. None of these