Everyday Science Most Important MCQs Six
Showing 221 – 230 of 426
The Carbon Dioxide in the atmosphere, by volume, is ________?
- A. 0.039%
- B. 3.9%
- C. 13%
- D. 30%
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
In night, when photosynthesis is stopped, plants ________?
- A. take in Carbon Dioxide
- B. take in Oxygen
- C. give off Carbon Dioxide
- D. give off Oxygen
Radioactive isotope of Uranium used in Nuclear Bomb is?
- A. U 92 235
- B. U 92 234
- C. U 92 233
- D. U 92 238
Study of life in outer space is known as?
- A. Endobiology
- B. Exobiology
- C. Enterobiology
- D. Neobiology
Founder of modern astronomy was ________?
- A. Archimedes
- B. William Gilbert
- C. Nicolas Copernicus
- D. Michael Faraday
Orbital period of the planet Mercury around the sun is ________?
- A. 88 days
- B. 365 days
- C. 2 years
- D. 98 days
The half life of a radioactive element is 8-days. How long it take to reduce it from 10 mg to 5 mg?
- A. 4 days
- B. 12 days
- C. 16 days
- D. 8 days
The phenomenon of Aurora Borealis, the display of red and green lights in northern hemisphere is due to radiations from ________?
- A. Ionosphere
- B. Troposphere
- C. Mesosphere
- D. Stratosphere
The echo (reflected sound) will be distinctly heard only at ordinary temperatures if the distance of the reflecting surfaces from the source of sound is at least ________?
- A. 1120 ft
- B. 120 ft
- C. 56 ft
- D. 100 ft
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