1
JEE Main 2021 (Online) 17th March Morning Shift
Numerical
+4
-1
The pressure exerted by a non-reactive gaseous mixture of 6.4g of methane and 8.8 g of carbon dioxide in a 10L vessel at 27$$^\circ$$C is __________ kPa. (Round off to the Nearest Integer).

[Assume gases are ideal, R = 8.314 J mol$$-$$1 K$$-$$1

Atomic masses : C : 12.0 u, H : 1.0 u, O : 16.0 u]
2
JEE Main 2021 (Online) 17th March Morning Shift
Numerical
+4
-1
The standard enthalpies of formation of Al2O3 and CaO are $$-$$1675 kJ mol-1 and $$-$$635 kJ mol$$-$$1 respectively.

For the reaction

3CaO + 2Al $$\to$$ 3Ca + Al2O3 the standard reaction enthalpy $$\Delta$$rH0 = _________ kJ.

(Round off to the Nearest Integer)
3
JEE Main 2021 (Online) 16th March Evening Shift
Numerical
+4
-1
At 25$$^\circ$$C, 50 g of iron reacts with HCl to form FeCl2. The evolved hydrogen gas expands against a constant pressure of 1 bar. The work done by the gas during this expansion is _________ J. (Round off to the Nearest Integer).

[Given : R = 8.314 J mol$$-$$1 K$$-$$1. Assume, hydrogen is an ideal gas] [Atomic mass of Fe is 55.85 u]
4
JEE Main 2021 (Online) 26th February Evening Shift
Numerical
+4
-1
The average S-F bond energy in kJ mol$$-$$1 of SF6 is __________. (Rounded off to the nearest integer)

[Given : The values of standard enthalpy of formation of SF6(g), S(g) and F(g) are - 1100, 275 and 80 kJ mol$$-$$1 respectively.]
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