MCQ
Beryllium’s fourth electron will have the four quantum numbers :
- A$n=1,l=0,m=0,s=+1/2$
- B$n=1,l=1,m=1,s=+1/2$
- ✓$n=2,l=0,m=0,s=-1/2$
- D$n=2,l=1,m=0,s=+1/2$
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$(K_f$ for water $= 1.86\, K \,kg\, mol^{-1},$ and molar mass of ethylene glycol $= 62\, g\, mol^{-1})$
(Density of water $= 1\,gm/ml$ )