10g each of CH4 and O2 are kept in cylinders of same volume under same temperatures, give the pressure ratio of two gases.
2 : 1
1 : 4
2 : 3
3 : 4
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The hydrides of the first elements in groups 15 – 17, namely NH3, H2O and HF respectively show abnormally high values for melting and boiling points. This is due to