1
JEE Main 2020 (Online) 8th January Evening Slot
Numerical
+4
-0
NaClO3 is used, even in spacecrafts, to produce O2. The daily consumption of pure O2 by a person is 492L at 1 atm, 300K. How much amount of NaClO3, in grams, is required to produce O2 for the daily consumption of a person at 1 atm, 300 K ?
NaClO3(s) + Fe(s) $$\to$$ O2(g) + NaCl(s) + FeO(s)
R = 0.082 L atm mol–1 K–1
2
JEE Main 2020 (Online) 8th January Evening Slot
Numerical
+4
-0
At constant volume, 4 mol of an ideal gas when heated from 300 K to 500K changes its internal energy by 5000 J. The molar heat capacity at constant volume is _______.
3
JEE Main 2020 (Online) 8th January Morning Slot
Numerical
+4
-0
The magnitude of work done by a gas that undergoes a reversible expansion along the path ABC shown in the figure is _______.
4
JEE Main 2020 (Online) 7th January Evening Slot
Numerical
+4
-0
The standard heat of formation $$\left( {{\Delta _f}H_{298}^0} \right)$$ of ethane (in kj/mol), if the heat of combustion of ethane, hydrogen and graphite are - 1560, -393.5 and -286 Kj/mol, respectively is
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