1
JEE Main 2021 (Online) 26th August Evening Shift
MCQ (Single Correct Answer)
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JEE Main 2021 (Online) 26th August Evening Shift Chemistry - Haloalkanes and Haloarenes Question 58 English
Consider the given reaction, the product A is :
A
JEE Main 2021 (Online) 26th August Evening Shift Chemistry - Haloalkanes and Haloarenes Question 58 English Option 1
B
JEE Main 2021 (Online) 26th August Evening Shift Chemistry - Haloalkanes and Haloarenes Question 58 English Option 2
C
JEE Main 2021 (Online) 26th August Evening Shift Chemistry - Haloalkanes and Haloarenes Question 58 English Option 3
D
JEE Main 2021 (Online) 26th August Evening Shift Chemistry - Haloalkanes and Haloarenes Question 58 English Option 4
2
JEE Main 2021 (Online) 26th August Evening Shift
Numerical
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In the sulphur estimation, 0.471 g of an organic compound gave 1.44 g of barium sulphate. The percentage of sulphur in the compound is ____________%. (Nearest integer)

(Atomic Mass of Ba = 137 u)
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3
JEE Main 2021 (Online) 26th August Evening Shift
Numerical
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The equilibrium constant Kc at 298 K for the reaction A + B $$\rightleftharpoons$$ C + D is 100. Starting with an equimolar solution with concentrations of A, B, C and D all equal to 1M, the equilibrium concentration of D is ___________ $$\times$$ 10$$-$$2 M. (Nearest integer)
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4
JEE Main 2021 (Online) 26th August Evening Shift
Numerical
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For water $$\Delta$$vap H = 41 kJ mol$$-$$1 at 373 K and 1 bar pressure. Assuming that water vapour is an ideal gas that occupies a much larger volume than liquid water, the internal energy change during evaporation of water is ___________ kJ mol$$-$$1

[Use : R = 8.3 J mol$$-$$1 K$$-$$1]
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