EL Kerboodle Test (MCQ's)

Question 1

Aluminium and silicon in the centre of Period 2 have high melting points because:

• they have ionic structures
• they have giant structures
• they have covalent lattices
• they have metallic lattices

Answer 1

• they have giant structures

Question 2

Elements in the s-block of the Periodic Table:

• have unfilled s-sub-shells
• form ions with charges up to +3
• have either one or two electrons in their outer shell
• are dense metals

Answer 2

• have either one or two electrons in their outer shell

Question 3

A lead salt that is soluble in water is:

• lead chloride
• lead nitrate
• lead carbonate
• lead sulfate

Answer 3

• lead nitrate

Question 4

The yellow line in the sodium spectrum has a wavelength of 5.89 × 10^–7 m.
This corresponds to a frequency of:

• 1.96 × 10^–15 Hz
• 177 Hz
• 1.70 × 10⁶ Hz
• 5.09 × 10¹⁴ Hz

Answer 4

• 5.09 × 10¹⁴ Hz

Question 5

Naturally-occurring copper consists of two isotopes. One is ⁶³Cu, occurring at 69%.
Which is the other?

• ⁶²Cu
• ⁶⁴Cu
• ⁶⁵Cu
• ⁶⁶Cu

Answer 5

• ⁶⁵Cu

Question 6

Which of the following is correct?

• Infrared radiation has a greater wavelength than visible radiation.
• Ultraviolet radiation has a greater wavelength than infrared.
• Visible radiation has a smaller frequency than infrared.
• Visible radiation has a greater frequency than ultraviolet.

Answer 6

• Infrared radiation has a greater wavelength than visible radiation.

Question 7

Silver nitrate could be prepared by:

• mixing silver chloride with excess nitric acid and crystallising
• mixing silver sulfate with excess aqueous sodium nitrate and filtering
• mixing silver carbonate with excess nitric acid and crystallising
• mixing silver carbonate with excess aqueous sodium nitrate and crystallising

Answer 7

• mixing silver carbonate with excess nitric acid and crystallising

Question 8

In the sodium chloride lattice:

• the ions are of equal size
• each sodium ion is attracted to one chloride ion
• each ion is surrounded by six ions of opposite charge
• delocalised electrons can conduct electricity

Answer 8

• each ion is surrounded by six ions of opposite charge

Question 9

s-orbitals:

• contain two electrons
• are dumb-bell shaped
• can contain electrons of opposite spins
• have the same energy as the p-orbitals from the same shell

Answer 9

• can contain electrons of opposite spins

Question 10

The formula of ammonium sulfate is:

• NH₄SO₄
• NH₃SO₄
• (NH₃)₂SO₄
• (NH₄)₂SO₄

Answer 10

• (NH₄)₂SO₄