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Among H2, He, CH4 and O2, the gas which can be easily liquefied is
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Syllabus
(a) 2 : 1
(b) 1 : 4
(c) 2 : 3
(d) 3 : 4
Kindly explain the above question and its answer
Among H2, He, CH4 and O2, the gas which can be easily liquefied is
1)K(He)=K(Ar)
2)K(He)>K(Ar)
3)K(He)=1/2K(Ar)
A 28. A capillary of radius r is lowered into a wetting agent with surface tension a and density d.
(i) The height h0 to witch the liquid will rise in the capillary is -
(A) (B) (C) (D)
(ii) The work done by surface tension is -
(A) (B) (D)
(iii) The potential energy acquired by the liquid in the capillary is equal to -
(A) (B)
Q5. An orange solid (X) on heating, gives a colourless gas (Y) and a only green residue (Z). Gas (Y) on treatment Mg, produces a white solid substance.....
(A) Mg3N2 (B) MgO (C) Mg2O3 (D) MgCl2