Which of the following noble gases is abundant in air?
Which of the following noble gases is abundant in air?A. Neon
B. Helium
C. Argon
D. Methane
B. Helium
C. Argon
D. Methane
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“Green House Effect” means:____________?
“Green House Effect” means:____________?A. Pollution
B. Prevention of ultraviolet rays
C. Trapg of Solar energy due to atmospheric carbon dioxide
D. D. NoneThe greenhouse effect is the problem caused by increased quantities of gases such as carbon dioxide in the air. These gases trap the heat from the sun, and cause a gradual rise in the temperature of the Earth’s atmosphere.
A state of stress caused by concern for the earth’s environment is called?
A state of stress caused by concern for the earth’s environment is called?A. Eco-anxiety
B. Eco-fear
C. Eco-depression
D. Eco-alarmWhat is the addictive drug in tobacco ______________?
What is the addictive drug in tobacco ______________?
A. Ethanol
B. Nicotine
C. Ammonia
D. TarWhich one of the following represents a chemical change_________?
Which one of the following represents a chemical change_________?A. Sublimation of iodine
B. Heating a platinum wire in a Bunsen flame
C. Heating of mercuric oxide powder
D. Evaporation of alcoholEach catalyst has_________________?
Each catalyst has_________________?A. Specificity
B. Special structure
C. Its own Ea
D. all of aboveThe vitamin Folate works together with __________ to produce new red blood cells?
The vitamin Folate works together with __________ to produce new red blood cells?
A. Vitamin D
B. Vitamin A
C. Vitamin B-12
D. None of the above