JEE Main 2021 (Online) 18th March Morning Shift | Equilibrium Question 62 | Chemistry

JEE Main 2021 (Online) 18th March Morning Shift

Numerical

-1

2 molal solution of a weak acid HA has a freezing point of 3.885$$^\circ$$C. The degree of dissociation of this acid is ___________ $$\times$$ 10^$$-$$3. (Round off to the Nearest Integer).

[Given : Molal depression constant of water = 1.85 K kg mol^$$-$$1 Freezing point of pure water = 0$$^\circ$$ C]

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JEE Main 2021 (Online) 17th March Evening Shift

Numerical

-1

A 1 molal K₄Fe(CN)₆ solution has a degree of dissociation of 0.4. Its boiling point is equal to that of another solution which contains 18.1 weight percent of a non electrolytic solute A. The molar mass of A is __________ u. (Round off to the Nearest Integer). [Density of water = 1.0 g cm^$$-$$3 ]

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JEE Main 2021 (Online) 17th March Morning Shift

Numerical

-1

0.01 moles of a weak acid HA (K_a = 2.0 $$\times$$ 10^$$-$$6) is dissolved in 1.0 L of 0.1 M HCl solution. The degree of dissociation of HA is __________ $$\times$$ 10^$$-$$5 (Round off to the Nearest Integer).

[Neglect volume change on adding HA. Assume degree of dissociation <<1 ]

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JEE Main 2021 (Online) 17th March Morning Shift

Numerical

-1

The oxygen dissolved in water exerts a partial pressure of 20 kPa in the vapour above water. The molar solubility of oxygen in water is __________ $$\times$$ 10^$$-$$5 mol dm^$$-$$3. (Round off to the Nearest Integer).

[Given : Henry's law constant = K_H = 8.0 $$\times$$ 10⁴ kPa for O₂. Density of water with dissolved oxygen = 1.0 kg dm^$$-$$3 ]

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