Published: May 20, 2009
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Category: General Knowledge (GK) Questions - 2020
Hydrogen and helium are the most commonly used lift gases. Although helium is twice as heavy as (diatomic) hydrogen, they are both so much lighter than air that this difference is inconsequential. Hydrogen has about 8% more buoyancy than helium . Both provide about 9.8 N of lift (the force to lift 1 kg) per cubic meter of gas at room temperature and sea level pressure. Helium is preferred because it is not combustible.
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a doubt sir…
Question number 3.. based on your explanation, Hydrogen is the lightest gas-right ?
but the answer that gets displayed is different.. do clarify..
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sir plz elaborate the ans of q 3
Answer to Question 8 is wrong.
Spleen is the reservoir (creator) of RBC not the destroyer.
Mr Arpit, bone marrow is creator of RBC, but spleen is the selective destroyer. I think 8 is right.
I think Q.9 is incorrect. Rainfall in W.Bengal, Bihar and eastern UP in the non-Monsoon season is due to tropical cyclonic circulations. The Western Disturbances bring rainfall in J&K, Punjab, Delhi and western UP during January-February.
Reply to Arpit Srivastava regarding Q.8:
The spleen is known as the GRAVEYARD of RBC. IT is where the RBC are destroyed upon the completion of their 120 days life cycle. Hence, the answer to Q.8 is correct.
Reply to Arpit and Ps:
It is true that the spleen is reservoir of RBC but it is clear form the question that It selectively destroy the RBC when its life is over. It is told to be reservoir because in case of too bleeding it supplied the necessary blood.
Answer for question 3 should be increase because fundamentally it will increase 1.5 times.
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more valuable questions to know as a member of this word
good knowledge of GK for adults