What would be the heat released when an aqueous solution containing 0.5 mole of HNO3 is mixed with 0.3 mole of OH- (enthalpy of neutralization is -57.1 k.J) ?
28.5 kJ
17.1 kJ
45.7 kJ
1.7 kJ
.Initially concentration of A is equal to that of B. The equilibrium concentrations of A and C are equal. Kc is
0.08
0.8
8
80
Two moles of PCl5, is heated in a closed vessel of 2 L capacity. When the equilibrium is attained 40% of it has been found to be dissociated. What is the Kc in mol/dm3?
0.532
0.266
0.133
0.174
B.
0.266
Number of moles of PCl5 dissociated at equilibrium = 2 x 40/100 = 0.8
How much of sulphur is present in an organic compound, if 0.53 g of the compound gave 1.158 g of BaSO4 on analysis ?
10%
20%
30%
15%
100 g CaCO3 is treated with 1 L of 1N HCl. What would be the weight of CO2 liberated after the completion of the reaction ?
55 g
11 g
22 g
33 g
The relationship between the energy E1 of the radiation with a wavelength 8000 Å and the energy E2 of the radiation with a wavelength Å 16000 is:
E1 = 6E2
E1 = 2E2
E1 = 4E2
E1 = 4E2
If the molecule of HCl were totally polar, the expected value of dipole moment is 6.12 D (debye), but the experimental value of dipole moment was 1.03 D. Calculate the percentage ionic character :
17
83
50
Zero
If the absolute temperature of a gas is doubled and the pressure is reduced to one half, the volume of the gas will :
remain unchanged
be doubled
increase four fold
be halved
To what temperature must a neon gas sample be heated to double its pressure, if the initial volume of gas at 75°C is decreased by 15.0%?
319°C
592°C
128°C
60°C