5.42×6+5.42×2432.71×32.71−27.29×27.29÷6.54×6.54−3.46×3.463.08×5+3.08×45 is equal to
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Q3
If the velocity of the electron in first orbit of hydrogen atom is 2.18×106m/s, what is its value in third orbit?
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Q4
A solution of urea (mol. mass 56g mol-1) boils at 100.18°C under atmospheric pressure. If Kf and Kb for water are 1.86 and 0.512 K kg mol-1 respectively, the above solution will freeze at
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Q5
A solution of urea (molar mass 56 g/mol) boils at 100.18°C at the atmospheric pressure. If Kf and Kb of water are 1.86 and 0.52 K kgmol−1 respectively, the above solution will freeze at