1
JEE Main 2022 (Online) 28th June Evening Shift
Numerical
+4
-1
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0.01 M KMnO4 solution was added to 20.0 mL of 0.05 M Mohr's salt solution through a burette. The initial reading of 50 mL burette is zero. The volume of KMnO4 solution left in the burette after the end point is _____________ mL. (nearest integer)

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2
JEE Main 2022 (Online) 25th June Evening Shift
Numerical
+4
-1
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The neutralization occurs when 10 mL of 0.1M acid 'A' is allowed to react with 30 mL of 0.05 M base M(OH)2. The basicity of the acid 'A' is __________.

[M is a metal]

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3
JEE Main 2021 (Online) 27th July Evening Shift
Numerical
+4
-1
10.0 mL of 0.05 M KMnO4 solution was consumed in a titration with 10.0 mL of given oxalic acid dihydrate solution. The strength of given oxalic acid solution is _________ $$\times$$ 10$$-$$2 g/L.

(Round off to the nearest integer)
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4
JEE Main 2021 (Online) 26th February Morning Shift
Numerical
+4
-1
Dichromate ion is treated with base, the oxidation number of Cr in the product formed is ___________.
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