Science Questions and Answers updated daily – General Knowledge



15 Science Questions and answers section with explanation for various online exam preparation, various interviews, General Knowledge Science online test. Science Questions with detailed description, explanation will help you to master the topic.

Science Questions

1. Sodium metal is kept under



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Correct Ans:kerosene
Explanation:


2. Which of the following was to be discovered first in the chromospheres of the sun?



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Correct Ans:helium
Explanation:


3. Galvanised iron sheets have a coating of



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Correct Ans:zinc
Explanation:


4. The average salinity of sea water is



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Correct Ans:3.5%
Explanation:


5. Which of the following is used as a lubricant?



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Correct Ans:graphite
Explanation:


6.    The hardest substance available on earth is



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Correct Ans:diamond
Explanation:


7. Bromine is a



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Correct Ans:red liquid
Explanation:


8. Which of the gas is not known as green house gas?



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Correct Ans:hygrogen
Explanation:
In order, the most abundant greenhouse gases in Earth's atmosphere are:

* water vapor
* carbon dioxide
* methane
* nitrous oxide
* ozone
* chlorofluorocarbons


9. The gas usually filled in the electric bulb is



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Correct Ans:nitrogen
Explanation:


10. Chemical formula for water is



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Correct Ans:h2o
Explanation:


11. Which of the following metals forms an amalgam with other metals?



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Correct Ans:mercury
Explanation:


12. Which of the following is used in pencils?



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Correct Ans:graphite
Explanation:


13. Chlorophyll is a naturally occurring chelate compound in which central metal is



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Correct Ans:magnesium
Explanation:


14. Which of the following is a non metal that remains liquid at room temperature?



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Correct Ans:bromine
Explanation:


15. Brass gets discoloured in air because of the presence of which of the following gases in air?



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Correct Ans:hydrogen sulphide
Explanation:



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