Ratio of molecular weights of A and B is then ratio of rates of diffusion will be
5 : 1
5 : 2
25 : 3
25 : 4
H-bond is strongest in
C2H5OH
H-F
H2O
CH3COCH3
B.
H-F
All compound which have hydrogen atom attached to F, O or N atom (i.e. highly electronegative atoms) exhibit H-bonding. In the question H - F exhibit strongest H-bonding because F is the most electronegative element.
a/ V2 given in van der Waal's equation is for
internal pressure
inter molecular attraction
both (1) and (2)
temperature correction
C(dia) + O2 CO2; = - 395.4 kJ/ mol
C(gr) + O2 CO2; H = - 393.5 kJ/ mol
C(gr) C(dia); H = ?
-3.8
-1.9
+3.8
+1.9
The internal energy of a substance
decrease with increase in temperature
increase with increase in temperature
remains unaffected with change in temperature
calculated by E = mc2