1
JEE Main 2020 (Online) 4th September Morning Slot
Numerical
+4
-0
A 20.0 mL solution containing 0.2 g impure H2O2 reacts completely with 0.316 g of KMnO4 in acid solution. The purity of H2O2 (in %) is _____________
(mol. wt. of H2O2 = 34; mol. wt. of KMnO4 = 158)
Your input ____
2
JEE Main 2020 (Online) 3rd September Evening Slot
Numerical
+4
-0
The volume (in mL) of 0.1 N NaOH required to neutralise 10 mL of 0.1 N phosphinic acid is ___________.
Your input ____
3
JEE Main 2020 (Online) 3rd September Evening Slot
Numerical
+4
-0
6.023 $$ \times $$ 1022 molecules are present in 10 g of a substance 'x'. The molarity of a solution containing 5 g of substance 'x' in 2 L solution is _____ × 10-3
Your input ____
4
JEE Main 2020 (Online) 3rd September Morning Slot
Numerical
+4
-0
The mole fraction of glucose (C6H12O6 ) in an aqueous binary solution is 0.1. The mass percentage of water in it, to the nearest integer, is _______.
Your input ____
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