1
JEE Main 2020 (Online) 2nd September Evening Slot
Numerical
+4
-0
The oxidation states of transition metal atoms
in K2Cr2O7, KMnO4 and K2FeO4, respectively,
are x, y and z. The sum of x, y and z is _______.
Your input ____
2
JEE Main 2020 (Online) 2nd September Evening Slot
Numerical
+4
-0
The ratio of the mass percentages of ‘C & H’
and ‘C & O’ of a saturated acyclic organic
compound ‘X’ are 4 : 1 and 3 : 4 respectively.
Then, the moles of oxygen gas required for
complete combustion of two moles of organic
compound ‘X’ is ________.
Your input ____
3
JEE Main 2020 (Online) 9th January Morning Slot
Numerical
+4
-0
The hardness of a water sample containing
10–3 M MgSO4 expressed as CaCO3 equivalents
(in ppm) is ______.
(molar mass of MgSO4 is 120.37 g/mol)
(molar mass of MgSO4 is 120.37 g/mol)
Your input ____
4
JEE Main 2020 (Online) 9th January Morning Slot
Numerical
+4
-0
The molarity of HNO3 in a sample which has
density 1.4 g/mL and mass percentage of 63%
is _____.
(Molecular Weight of HNO3 = 63)
(Molecular Weight of HNO3 = 63)
Your input ____
Questions Asked from Some Basic Concepts of Chemistry (Numerical)
Number in Brackets after Paper Indicates
No. of Questions
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