1
JEE Main 2021 (Online) 27th August Morning Shift
Numerical
+4
-1
In Carius method for estimation of halogens, 0.2 g of an organic compound gave 0.188 g of AgBr. The percentage of bromine in the compound is ______________. (Nearest integer)

[Atomic mass : Ag = 108, Br = 80]
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2
JEE Main 2021 (Online) 26th August Evening Shift
Numerical
+4
-1
100 mL of Na3PO4 solution contains 3.45 g of sodium. The molarity of the solution is _____________ $$\times$$ 10$$-$$2 mol L$$-$$1. (Nearest integer)

[Atomic Masses - Na : 23.0 u, O : 16.0 u, P : 31.0 u]
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3
JEE Main 2021 (Online) 26th August Morning Shift
Numerical
+4
-1
An aqueous KCl solution of density 1.20 g mL$$-$$1 has a molality of 3.30 mol kg$$-$$1. The molarity of the solution in mol L$$-$$1 is ____________ (Nearest integer) [Molar mass of KCl = 74.5]
Your input ____
4
JEE Main 2021 (Online) 27th July Evening Shift
Numerical
+4
-1
2SO2(g) + O2(g) $$\to$$ 2SO3(g)

The above reaction is carried out in a vessel starting with partial pressure PSO2 = 250 m bar, PO2 = 750 m bar and PSO3 = 0 bar. When the reaction is complete, the total pressure in the reaction vessel is _______ m bar. (Round off of the nearest integer).
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