General
✓✗The hydrogen ion concentration of a 10−8 M HCl aqueous solution at 298 K (Kw = 10−14) is
- 1.0 × 10−8 M
- 1.0525 × 10−7 M
- 1.0 × 10−6 M
- 9.525 × 10−8 M
General
✓✗Statement I: A large value of K indicates that the reaction is fast.
Statement II: K tells us the extent of a reaction, not its rate.
Statement II: K tells us the extent of a reaction, not its rate.
- Both Statement I and Statement II are correct
- Both Statement I and Statement II are incorrect
- Statement I is correct but Statement II is incorrect
- Statement I is incorrect but Statement II is correct
General
✓✗The pH of 0.005 M Ba(OH)2 solution is
- 2
- 11.7
- 12.3
- 12
General
✓✗Which of the following 0.1 M solutions has the lowest pH?
- CH3COONH4
- CH3COONa
- NaCl
- NH4Cl
General
✓✗The molar solubility of PbI2 is 1 × 10−3 mol L−1. Its Ksp is
- 4 × 10−9
- 1 × 10−6
- 2 × 10−6
- 1 × 10−9
General
✓✗According to the Lewis concept, an acid is an
- electron-pair donor
- OH− donor
- proton donor
- electron-pair acceptor
General
✓✗The melting point of ice decreases slightly with increase in pressure. This is explained by
- Raoult’s law
- Le Chatelier’s principle, since ice has a larger volume than the water formed
- Henry’s law
- the law of mass action
General
✓✗The solubility of AgCl will be minimum in
- 0.01 M NaCl
- 0.01 M CaCl2
- 0.001 M AgNO3
- pure water
General
✓✗The pH of a 10−3 M H2SO4 solution (assume complete ionisation) is about
- 3.3
- 2.0
- 3.0
- 2.7
General
✓✗50 mL of 0.1 M HCl is mixed with 50 mL of 0.1 M NaOH. The pH of the resulting solution at 25 °C is
- 13
- 7
- 1
- 0
General
✓✗A salt will precipitate from a solution when its ionic product
- is less than its Ksp
- is equal to Kw
- exceeds its Ksp
- equals zero
General
✓✗A solution of HCl has pH 2. It is diluted 10 times with water. The new pH is
- 20
- 1
- 3
- 2
General
✓✗According to the Arrhenius concept, an acid is a substance that
- accepts a proton
- gives OH− ions in water
- gives H+ (or H3O+) ions in water
- accepts an electron pair
General
✓✗For N2O4(g) ⇌ 2NO2(g), the vapour density of the equilibrium mixture at a certain temperature is 38.33. The percentage dissociation of N2O4 is (molar mass of N2O4 = 92 g mol−1)
- 20%
- 10%
- 33%
- 40%
General
✓✗Assertion: In a saturated solution of a sparingly soluble salt, Q = Ksp.
Reason: In a saturated solution, the dissolved ions are in equilibrium with the undissolved solid.
Reason: In a saturated solution, the dissolved ions are in equilibrium with the undissolved solid.
- Both Assertion and Reason are true and Reason is the correct explanation of Assertion
- Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
- Assertion is true but Reason is false
- Both Assertion and Reason are false