JEE Main 2018 — Some Basic Concepts Of Chemistry Question with Solution
From: JEE Main 2018 (Online) 15th April Evening Slot
Question
For per gram of reactant, the maximum quantity of N2 gas is produced in which of the following thermal decomposition reactions ?
(Given : Atomic wt. - Cr = 52 u, Ba = 137 u)
(Given : Atomic wt. - Cr = 52 u, Ba = 137 u)
Choose an option
Show full solutionCorrect option: D
Correct answer
D2NH3(g) N2(g) + 3H2(g)
Step-by-step explanation
(a) Molar mass of (NH4)2 Cr2O7 = 252 g/mol.
252g of (NH4)2 Cr2 O7 produce 28g mole of N2
1 g of (NH4)2 Cr2 O7 Produce = g N2
(b) Molar mass of NH4 NO3 = 80 g/mol
2 80 g of NH4 NO3 produce 28 2g of N2
1 g of NH4 NO3 produce = = 0.35 g N2
(c) Molar mass of Ba(N3)2 = 221 g/mol
221 g of Ba(N3)2 produce 3 28 g of N2
1 g of Ba(N3)2 produce = = 0.38 g of N2
(d) Molar mass of NH3 = 17 g/mol
17 2 NH3 produce 28 g of N2
1 g of NH3 produce = = 0.823 g of N2
252g of (NH4)2 Cr2 O7 produce 28g mole of N2
1 g of (NH4)2 Cr2 O7 Produce = g N2
(b) Molar mass of NH4 NO3 = 80 g/mol
2 80 g of NH4 NO3 produce 28 2g of N2
1 g of NH4 NO3 produce = = 0.35 g N2
(c) Molar mass of Ba(N3)2 = 221 g/mol
221 g of Ba(N3)2 produce 3 28 g of N2
1 g of Ba(N3)2 produce = = 0.38 g of N2
(d) Molar mass of NH3 = 17 g/mol
17 2 NH3 produce 28 g of N2
1 g of NH3 produce = = 0.823 g of N2
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