1

JEE Main 2021 (Online) 27th July Evening Shift

Numerical

+4

-1

10.0 mL of 0.05 M KMnO

(Round off to the nearest integer)

_{4}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)

Your input ____

2

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 ___________.

Your input ____

3

JEE Main 2021 (Online) 25th February Morning Shift

Numerical

+4

-1

0.4 g mixture of NaOH, Na

_{2}CO_{3}and some inert impurities was first titrated with $${N \over {10}}$$ HCl using phenolphthalein as an indicator, 17.5 mL of HCl was required at the end point. After this methyl orange was added and titrated. 1.5 mL of same HCl was required for the next end point. The weight percentage of Na_{2}CO_{3}in the mixture is ________. (Rounded off to the nearest integer)Your input ____

4

JEE Main 2020 (Online) 5th September Evening Slot

Numerical

+4

-0

The volume, in mL, of 0.02 M K

(Molar mass of Fe = 56 g mol

_{2}Cr_{2}O_{7}solution required to react with 0.288 g of ferrous oxalate in acidic medium is _______.(Molar mass of Fe = 56 g mol

^{–1})Your input ____

Questions Asked from Redox Reactions (Numerical)

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