1
JEE Main 2021 (Online) 17th March Evening Shift
Numerical
+4
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Out of Syllabus
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KBr is doped with 10$$-$$5 mole percent of SrBr2. The number of cationic vacancies in 1g of KBr crystal is ____________ 1014. (Round off to the Nearest Integer).

[Atomic Mass : K : 39.1 u, Br : 79.9 u NA = 6.023 $$\times$$ 1023]
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2
JEE Main 2021 (Online) 17th March Evening Shift
Numerical
+4
-1
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JEE Main 2021 (Online) 17th March Evening Shift Chemistry - Some Basic Concepts of Chemistry Question 115 English
Consider the above reaction. The percentage yield of amide product is __________. (Round off to the Nearest Integer).

(Given : Atomic mass : C : 12.0 u, H : 1.0 u, N : 14.0 u, O : 16.0 u, Cl : 35.5 u)
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3
JEE Main 2021 (Online) 17th March Evening Shift
Numerical
+4
-1
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The reaction 2A + B2 $$ \to $$ 2AB is an elementary reaction.

For a certain quantity of reactants, if the volume of the reaction vessel is reduced by a factor of 3, the rate of the reaction increases by a factor of ____________. (Round off to the Nearest Integer).
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4
JEE Main 2021 (Online) 17th March Evening Shift
Numerical
+4
-1
Change Language
Consider the reaction

$$N_{2}O_{4}\left( g\right) \rightleftharpoons 2NO_{2}\left( g\right) $$

The temperature at which KC = 20.4 and KP = 600.1, is ____________ K. (Round off to the Nearest Integer). [Assume all gases are ideal and R = 0.0831 L bar K$$-$$1 mol$$-$$1]
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