1
JEE Main 2021 (Online) 26th August Evening Shift
Numerical
+4
-1
A chloro compound "A".

(i) forms aldehydes on ozonolysis followed by the hydrolysis.

(ii) when vaporized completely 1.53 g of A, gives 448 mL of vapour at STP.

The number of carbon atoms in a molecule of compound A is ___________.
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2
JEE Main 2021 (Online) 26th August Morning Shift
Numerical
+4
-1
An aqueous KCl solution of density 1.20 g mL$$-$$1 has a molality of 3.30 mol kg$$-$$1. The molarity of the solution in mol L$$-$$1 is ____________ (Nearest integer) [Molar mass of KCl = 74.5]
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3
JEE Main 2021 (Online) 27th July Evening Shift
Numerical
+4
-1
10.0 mL of 0.05 M KMnO4 solution was consumed in a titration with 10.0 mL of given oxalic acid dihydrate solution. The strength of given oxalic acid solution is _________ $$\times$$ 10$$-$$2 g/L.

(Round off to the nearest integer)
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4
JEE Main 2021 (Online) 27th July Morning Shift
Numerical
+4
-1
The density of NaOH solution is 1.2 g cm$$-$$3. The molality of this solution is _____________ m. (Round off to the Nearest Integer)

[Use : Atomic mass : Na : 23.0 u, O : 16.0 u, H : 1.0 u, Density of H2O : 1.0 g cm$$-$$3]
Your input ____
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