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1
JEE Main 2022 (Online) 29th June Morning Shift
MCQ (Single Correct Answer)  +4  -1
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Production of iron in blast furnace follows the following equation

Fe3O4(s) + 4CO(g) $$\to$$ 3Fe(l) + 4CO2(g)

when 4.640 kg of Fe3O4 and 2.520 kg of CO are allowed to react then the amount of iron (in g) produced is :

[Given : Molar Atomic mass (g mol$$-$$1) : Fe = 56, Molar Atomic mass (g mol$$-$$1) : O = 16, Molar Atomic mass (g mol$$-$$1) : C = 12]

A
1400
B
2200
C
3360
D
4200
2
JEE Main 2022 (Online) 28th June Evening Shift
MCQ (Single Correct Answer)  +4  -1
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Compound A contains 8.7% Hydrogen, 74% Carbon and 17.3% Nitrogen. The molecular formula of the compound is,

Given : Atomic masses of C, H and N are 12, 1 and 14 amu respectively.

The molar mass of the compound A is 162 g mol$$-$$1.

A
C4H6N2
B
C2H3N
C
C5H7N
D
C10H14N2
3
JEE Main 2022 (Online) 26th June Morning Shift
MCQ (Single Correct Answer)  +4  -1
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Bengali

A commercially sold conc. HCl is 35% HCl by mass. If the density of this commercial acid is 1.46 g/mL, the molarity of this solution is:

(Atomic mass : Cl = 35.5 amu, H = 1 amu)

A
10.2 M
B
12.5 M
C
14.0 M
D
18.2 M
4
JEE Main 2022 (Online) 24th June Evening Shift
MCQ (Single Correct Answer)  +4  -1
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Bengali

120 g of an organic compound that contains only carbon and hydrogen gives 330 g of CO2 and 270 g of water on complete combustion. The percentage of carbon and hydrogen, respectively are

A
25 and 75
B
40 and 60
C
60 and 40
D
75 and 25
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