1
JEE Main 2021 (Online) 25th February Morning Shift
Numerical
+4
-1
1 molal aqueous solution of an electrolyte A2B3 is 60% ionised. The boiling point of the solution at 1 atm is _________ K. (Rounded off to the nearest integer)

[Given Kb for (H2O) = 0.52 K kg mol$$-$$1]
2
JEE Main 2021 (Online) 24th February Evening Shift
Numerical
+4
-1
C6H6 freezes at 5.5$$^\circ$$C. The temperature at which a solution of 10g of C4H10 in 200g of C6H6 freeze is __________ $$^\circ$$C. (The molal freezing point depression constant of C6H6 is 5.12$$^\circ$$C/m.)
3
JEE Main 2021 (Online) 24th February Morning Shift
Numerical
+4
-1
When 9.45 g of CICH2COOH is added to 500 mL of water, its freezing point drops by 0.5°C. The dissociation constant of CICH2COOH is x $$\times$$ 10-3.
The value of x is ________. (Rounded off to the nearest integer)
[Kf(H20) = 1.86 K kg mol-1]
4
JEE Main 2020 (Online) 6th September Morning Slot
Numerical
+4
-0
The elevation of boiling point of 0.10 m aqueous CrCl3.xNH3 solution is two times that of 0.05 m aqueous CaCl2 solution. The value of x is ______.

[Assume 100% ionisation of the complex and CaCl2, coordination number of Cr as 6, and that all NH3 molecules are present inside the coordination sphere]