Question 1

What is the correct trend going down groups 1 and 17?

Accepted Answer

Ionization energies decrease

Answer

Melting points increase

Answer

Boiling points decrease

Answer

Electronegativities increase

Question 2

Which of these statements are correct?

I. Zinc is not a transition element.

II. Ligands are Lewis bases.

III. Manganese(II) chloride is paramagnetic.

Accepted Answer

I, II, and III

Answer

I and III only

Answer

I and II only

Answer

II and III only

Question 3

What is the effect of a stronger ligand?

Accepted Answer

A

Answer

D

Answer

B

Answer

C

Question 4

Which describes an atom of bismuth, Bi (Z = 83)?

Accepted Answer

C

Answer

A

Answer

D

Answer

B

Question 5

Which series represents atoms in order of decreasing atomic radius?

Accepted Answer

Mg > Be > C > N

Answer

N > C > Be > Mg

Answer

Mg > N > C > Be

Answer

Be > C > N > Mg

Question 6

Which electrons are removed from iron (Z = 26) to form iron(II)?

Accepted Answer

two 4s electrons

Answer

two 3d electrons

Answer

one 4s electron and one 3d electron

Answer

two 4p electrons

Question 7

How is colour produced in transition metal complexes?

Accepted Answer

Light is absorbed when electrons are promoted between split d-orbitals.

Answer

Light is emitted when the complex returns to ground state.

Answer

Light is absorbed when electrons escape from the complex.

Answer

Light is emitted when electrons fall between split d-orbitals.

Question 8

How do the following properties change down Group 17 of the periodic table?

Accepted Answer

C

Answer

A

Answer

D

Answer

B

Question 9

What is the oxidation state of the metal ion and charge of the complex ion in [Co(NH₃)₄Cl₂]Cl?

Accepted Answer

C

Answer

A

Answer

D

Answer

B

Question 10

Which is correct for the complex ion in [Fe(H₂O)₅Cl]SO₄?

Accepted Answer

D

Answer

B

Answer

C

Answer

A

Question 11

Which complex has the greatest d orbital splitting?

Accepted Answer

B

Answer

A

Answer

C

Answer

D

Question 12

Part of the spectrochemical series is shown for transition metal complexes.

I⁻< Cl⁻ < H₂O < NH₃

Which statement can be correctly deduced from the series?

Accepted Answer

H₂O increases the d–d separation more than Cl⁻.

Answer

H₂O increases the p–d separation more than Cl⁻.

Answer

Complexes with water are always blue.

Answer

A complex with Cl⁻ is more likely to be blue than that with NH₃.

Question 13

CoCl₆]^3– is orange while [Co(NH₃)₆]³⁺ is yellow. Which statement is correct?

Accepted Answer

The different ligands cause different splitting in the 3d orbitals.

Answer

The different colours are due to the different charges on the complex.

Answer

[CoCl₆]^3– absorbs orange light.

Answer

The oxidation state of cobalt is different in each complex.

Question 14

Which electron configuration is that of a transition metal atom in the ground state?

Accepted Answer

[Ar]4s¹3d⁵

Answer

[Ne]3s²3p⁶4s¹

Answer

1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p²

Answer

[Ar]3d9

Question 15

What is the order of decreasing ionic radius?

Accepted Answer

S²⁻ > Cl⁻ > Mg²⁺ > Al³⁺

Answer

Cl⁻ > S²⁻ > Al³⁺ > Mg²⁺

Answer

Mg²⁺ > Al³⁺ > Cl⁻ > S²⁻

Answer

S²⁻ > Cl⁻ > Al³⁺ > Mg²⁺

Question 16

What is the charge on the iron(III) complex ion in [Fe(OH)₂(H₂O)₄]Br?

Accepted Answer

1+

Answer

0

Answer

3+

Answer

2+

Question 17

X, Y, and Z represent the successive elements, Ne, Na, and Mg, but not necessarily in that order. What is the order of increasing atomic number?

Accepted Answer

X < Y < Z

Answer

X < Z < Y

Answer

Y < X < Z

Answer

Y < Z < X

Question 18

Ammonia is a stronger ligand than water. Which is correct when concentrated aqueous ammonia solution is added to dilute aqueous copper(II) sulfate solution?

Accepted Answer

Ammonia replaces water as a ligand.

Answer

There is a smaller splitting of the d-orbitals.

Answer

The colour of the solution fades.

Answer

The d-orbitals in the copper ion split.

Question 19

Which best explains why transition metal complexes are coloured?

Accepted Answer

As electrons are promoted to higher energy levels, light of a certain colour is absorbed, and the complementary colour is observed.

Answer

As electrons are promoted to higher energy levels, light of a certain colour is absorbed, so the complex appears to have the same colour.

Answer

As electrons return to lower energy levels, light of a certain colour is emitted, so the complex appears to have the same colour.

Answer

As electrons return to lower energy levels, light of a certain colour is emitted, and the complementary colour is observed.

Question 20

What is the correct explanation for the colour of [Cu(H₂O)₆]²⁺?

Accepted Answer

Light is absorbed when an electron moves to a d orbital of higher energy.

Answer

Light is absorbed when electrons move from the ligands to the central metal ion.

Answer

Light is released when an electron moves to a d orbital of higher energy.

Answer

Light is absorbed when electrons move between d and s orbitals.

Question 21

Which property increases down group 17, the halogens?

Accepted Answer

Boiling point

Answer

Electron affinity

Answer

Reactivity

Answer

First ionization energy

Question 22

Which correctly describes the reaction between potassium and excess water?

Accepted Answer

The final products of the reaction are potassium hydroxide and hydrogen.

Answer

The final products of the reaction are potassium oxide and hydrogen.

Answer

The reaction is endothermic.

Answer

The final pH of the solution is 7.

Question 23

The oxidation state of cobalt in the complex ion [Co(NH₃)₅Br]^x is +3. Which of the following statements are correct?

I. The overall charge, x, of the complex ion is 2+.

II. The complex ion is octahedral.

III. The cobalt(III) ion has a half-filled d-subshell.

Accepted Answer

I and II only

Answer

I and III only

Answer

I, II, and III

Answer

II and III only

Question 24

Which of the following shows a general increase across period 3 from Na to Cl?

Accepted Answer

Ionization energy

Answer

Atomic radius

Answer

Ionic radius

Answer

Melting point

Question 25

Which oxide will dissolve in water to give the solution with the lowest pH?

Accepted Answer

P₄O₁₀

Answer

Al2O3

Answer

SiO2

Answer

MgO

Question 26

Which property shows a general increase from left to right across period 2, Li to F?

Accepted Answer

Electronegativity

Answer

Ionic radius

Answer

Melting point

Answer

Electrical conductivity

Question 27

Which is an f-block element?

Accepted Answer

Sm

Answer

Sn

Answer

Sr

Answer

Sc

Question 28

What are typical characteristics of metals?

Accepted Answer

A

Answer

B

Answer

C

Answer

D

Question 29

Which of the following would have the same numerical value for all elements in the same period?

Accepted Answer

Highest energy levels occupied

Answer

Orbitals occupied

Answer

Valence electrons

Answer

Energy sub-levels occupied

Question 30

How do the following properties change down Group 17 of the periodic table?

Accepted Answer

C

Answer

D

Answer

B

Answer

A

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