1
JEE Main 2021 (Online) 24th February Morning Shift
Numerical
+4
-1
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4.5 g of compound A (MW = 90) was used to make 250 mL of its aqueous solution. The molarity of the solution in M is x $$ \times $$ 10-1.
The value of x is _______. (Rounded off to the nearest integer)
Your input ____
2
JEE Main 2020 (Online) 4th September Evening Slot
Numerical
+4
-0
Consider the following equations :
2Fe2+ + H2O2 $$ \to $$ xA + yB
(in basic medium)
2MnO4- + 6H+ + 5H2O2 $$ \to $$ x'C + y'D + z'E
(in acidic medium)
The sum of the stoichiometric coefficients x, y, x', y', and z' for products A, B, C, D and E, respectively, is ______.
Your input ____
3
JEE Main 2020 (Online) 4th September Morning Slot
Numerical
+4
-0
The mass of ammonia in grams produced when 2.8 kg of dinitrogen quantitatively reacts with 1 kg of dihydrogen is _______.
Your input ____
4
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 ____
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