Everyday Science MCQs

5120 MCQs  (Page 345 of 512)

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The source of oxygen in photosynthesis is
A. Water
B. Salts
C. Minerals
D. Glucose
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The natural fats and oils are composed of_________?
A. Carbon, hydrogen and oxygen
B. Carbon, hydrogen and nitrogen
C. Carbon, oxygen and nitrogen
D. Hydrogen, oxygen and nitrogen
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The energy value of food is measured in_______?
A. Joule
B. Calories
C. Tesla
D. Proteins
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Wind energy is the __________ energy.
A. Potential
B. Transverse
C. Kinetic
D. Mechanical
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Acid rain is mainly caused by emissions of __________ in the atmosphere?
A. Sulfur dioxide and potassium nitrate
B. Sulfur and charcoal
C. Nitrogen oxide and potassium nitrate
D. Sulfur dioxide and nitrogen oxide
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About 50% of the Earth’s crust, including the waters on the Earth and atmosphere, is?
A. Oxygen
B. Cabon dioxide
C. Silicon
D. Clay
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The fourth state of matter is?
A. Water
B. Salts
C. Vapours
D. Plasma
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The device used to convert Alternate Current into Direct Current is called?
A. Anemometer
B. Battery
C. Galvanometer
D. Rectifier
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In night, when photosynthesis is stopped, plants__________?
A. Take in carbon dioxide
B. Give off oxygen
C. Give off carbon dioxide
D. None of these
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A metallic atom loses its valence electron to form a/an _________?
A. An anion
B. A cation
C. An anion – cation
D. None of these​
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Word of the Day
26 Jul
Simultaneously
at the same time.
ایک ہی وقت میں، ایک ساتھ، بیک وقت

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