One mole of which of the following has the highest entropy ?
Liquid nitrogen
Hydrogen gas
Mercury
Diamond
1 mole of H2SO4 is mixed with 2 moles of NaOH .The heat evolved will be :
57.3 kJ
2 x 57.3 kJ
57.3/2 kJ
Cannot be predicted
One mole. of a perfect gas expands isothermally to ten times of its original volume. The change in entropy is :
0.1 R
2.303 R
10.0 R
100.0 R
B.
2.303 R
S = 2.303nR log
n = 1
S = 2.303 R log
S = 2.303R (log 10 = 1)
100 cc of 0.6 N H2SO4 and 200 cc of 0.3 N HCl were mixed together .The normality of the solution will be :
0.2 N
0.4 N
0.8 N
0.6 N
If the mass defect of is 0.090 u , then binding energy per nucleon is :
(1 u = 931.5 MeV)
9.315 MeV
931.5 MeV
83.0 MeV
8.38 MeV
50 mL of 0.1 M HCl and 50 mL of 0.2 M NaOH are mixed .The pH of the resulting solution is :
1.30
4.2
12.70
11.70
27Co60 is radioactive because :
its atomic number is high
it has high ratio
it has high ratio
None of the above