Temperature of 1 mol of a gas is increased by 1 at constant pressure. Work done is-

1. R

2. 2R

3. R/2

4. 3R

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When 0.16 g of glucose was burnt in a bomb calorimeter, the temperature rose by 4 deg. Calculate the calorimeter constant (water equivalent of the calorimeter) given that H=-2.8×106 J mol-1. [molar enthalpy of combustion]. Molar mass of glucose = 180 mol-1.

1. 5.73×102 J/deg

2. 7.53×102 J/deg

3. 6.22×102 J/deg

4. 3.57×102 J/deg

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The C-Cl bond energy can be calculated from :

1. HfCCl4, l only

2. fCCl4, l and Cl2

3. HfCCl4, l Cl2

4. HfCCl4, l Cl2, HfC, g and HvapCCl4

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Given Hf of DyCl3 (s) = -994.30 kJ mol-1

12H2g+12Cl2g+aqHClaq. 4 M;              H=-158.31 kJ mol-1DyCl3sHClaqDyCl3aq. in 4 M HCl;                H=-180.06 kJ mol-1Dysaq. 4 M+3 HClDyCl3aq. 4 M HCl+32H2g;   H=x, calculate x.

1. -966.5 kJ/mol

2. -699.43 kJ/mol

3. -596.6 kJ/mol

4. -569.6 kJ/mol

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1 g H2 gas at S.T.P is expanded so that volume is doubled. Hence work done is:

1. 22.4 L atm

2. 5.6 L atm

3. 11.2 L atm

4. 44.8 L atm

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H for the reaction 2C(s) + 3H2(g)C2H6(g) is -20.24 kcal/mol. To what value of the enthalpy of sublimation of C(s) does this point given that the bond energies of C-C, C-H and H-H are 63 kcal/mol, 85.6 kcal/mol and 102.6 kcal/mol.

1. 124.3 kcal/mol

2. 185.3 kcal/mol

3. 158.3 kcal/mol

4. 211.5 kcal/mol

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The gas absorbs 100 J heat and is simultaneously compressed by a constant external pressure of 1.50 atm from 8 lit. to 2 lit. in volume. Hence E will be-

1. -812 J

2. 812 J

3. 1011 J

4. 911 J

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If G=H-TS and G=H+TdGdTP then variation of EMF of a cell E, with temperature T, is given by

1. HnF 

2. GnF

3. SnF

4. -SnF

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The standard heat of combustion of Al is -837.8 kJ mol-1 at 25C which of the following releases 250 kcal of heat ?

1. The reaction of 0.624 mol of Al

2. The formation of 0.624 mol of Al2O3

3. The reaction of 0.312 mol of Al

4. The formation of 0.150 mol of Al2O3

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CP-CV=R. This R is :

1. Change in K.E.

2. Change in rotational energy

3. work done which system can do on expanding the gas per mol per degree increase in temperature

4. All correct

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