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1
JEE Main 2021 (Online) 24th February Evening Slot
Numerical
+4
-1
Change Language
The formula of a gaseous hydrocarbon which requires 6 times of its own volume of O2 for complete oxidation and produces 4 times its own volume of CO2 is CxHy. The value of y is _____________.
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2
JEE Main 2021 (Online) 24th February Morning Slot
Numerical
+4
-1
Change Language
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)
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3
JEE Main 2020 (Online) 6th September Morning Slot
Numerical
+4
-0
In an estimation of bromine by Carius method, 1.6 g of an organic compound gave 1.88 g of AgBr. The mass percentage of bromine in the compound is _______.
(Atomic mass, Ag = 108, Br = 80 g mol–1)
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4
JEE Main 2020 (Online) 5th September Morning Slot
Numerical
+4
-0
The minimum number of moles of O2 required for complete combustion of 1 mole of propane and 2 moles of butane is _____.
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