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JEE Main 2022 (Online) 25th June Morning Shift
MCQ (Single Correct Answer)
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The reaction of JEE Main 2022 (Online) 25th June Morning Shift Chemistry - Compounds Containing Nitrogen Question 99 English with bromine and KOH gives RNH2 as the end product. Which one of the following is the intermediate product formed in this reation?

A
JEE Main 2022 (Online) 25th June Morning Shift Chemistry - Compounds Containing Nitrogen Question 99 English Option 1
B
R $$-$$ NH $$-$$ Br
C
R $$-$$ N = C = O
D
JEE Main 2022 (Online) 25th June Morning Shift Chemistry - Compounds Containing Nitrogen Question 99 English Option 4
2
JEE Main 2022 (Online) 25th June Morning Shift
Numerical
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The number of N atoms in 681 g of C7H5N3O6 is x $$\times$$ 1021. The value of x is (NA = 6.02 $$\times$$ 1023 mol$$-$$1) (Nearest Integer)

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3
JEE Main 2022 (Online) 25th June Morning Shift
Numerical
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The longest wavelength of light that can be used for the ionisation of lithium atom (Li) in its ground state is x $$\times$$ 10$$-$$8 m. The value of x is ___________. (Nearest Integer).

(Given : Energy of the electron in the first shell of the hydrogen atom is $$-$$2.2 $$\times$$ 10$$-$$18 J ; h = 6.63 $$\times$$ 10$$-$$34 Js and c = 3 $$\times$$ 108 ms$$-$$1)

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4
JEE Main 2022 (Online) 25th June Morning Shift
Numerical
+4
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The standard entropy change for the reaction

4Fe(s) + 3O2(g) $$\to$$ 2Fe2O3(s) is $$-$$550 J K$$-$$1 at 298 K.

[Given : The standard enthalpy change for the reaction is $$-$$165 kJ mol$$-$$1]. The temperature in K at which the reaction attains equilibrium is _____________. (Nearest Integer)

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