PIONEER JUNIOR COLLEGE - ASKnLearn

10
Section B
For each of the next 10 questions, one or more of the three numbered statements 1 to 3
may be correct.
Decide whether each of the statements is or is not correct (you may find it helpful to put a
tick against the statements which you consider to be correct).
The responses A to D should be selected on the basis of
A B C D
1, 2 and 3 are 1 and 2 only are 2 and 3 only are 1 only is correct
correct
correct
correct
No other combination of statements is used as a correct response.
31 What factors contribute to the lattice energy of magnesium fluoride being numerically
greater than that of magnesium chloride?
1 Radius of fluoride ion is smaller than that of chloride ion.
2 Fluorine is more electronegative than chlorine.
3 The magnitude of the enthalpy change of hydration of fluoride ions is greater
than that of chloride ions.
32 Consider the following two half-cells.
Cd 2+ (aq) + 2e ⇌ Cd(s)
Ag + (aq) + e ⇌ Ag(s)
E Ө = -0.40 V
E Ө = +0.80 V
Which of the following statements are correct?
1 Ag + is a stronger oxidising agent than Cd 2+ .
2 The potential of Cd electrode relative to Ag electrode is -1.20 V.
3 Electrons will flow in the external circuit from Ag to Cd when the two half-cells
are connected.
33 The use of Data Booklet is relevant to this question.
When 386 C of electricity are passed through a molten compound of a metal,
2.00 × 10 -3 mol of atoms of the metal is deposited at the cathode. What could the
metal be?
1 copper
2 tin
3 silver