1
JEE Main 2020 (Online) 3rd September Morning Slot
Numerical
+4
-0
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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 _______.
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2
JEE Main 2020 (Online) 3rd September Morning Slot
Numerical
+4
-0
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The volume strength of 8.9 M H2O2 solution calculated at 273 K and 1 atm is ______. (R = 0.0821 L atm K-1 mol-1) (rounded off ot the nearest integer)
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3
JEE Main 2020 (Online) 2nd September Evening Slot
Numerical
+4
-0
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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 ________.
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4
JEE Main 2020 (Online) 9th January Evening Slot
Numerical
+4
-0
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10.30 mg of O2 is dissolved into a liter of sea water of density 1.03 g/mL. The concentration of O2 in ppm is__________.
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