Cambridge AS & A Level Chemistry Quiz

Which atom has its outermost electron in an orbital of the shape shown, with principal quantum number 3?

• sodium

• chlorine

• calcium

• bromine

Which atom has the same number of electrons as the hydroxide ion, OH–?

• F

• Ne

• Na

• Mg

Which metal produces the largest volume of gas?

• calcium

• potassium

• rubidium

• strontium

What could be substance X?

• N2

• N2O

• NO

• NO2

In which structure are three atoms bonded together in a straight line?

• poly(ethene)

• propane

• silicon tetrachloride

• sulfur hexafluoride

Which statement about aluminium chloride is correct?

• Aluminium chloride has a much higher melting point than magnesium chloride due to the small size of the aluminium ion.

• Anhydrous aluminium chloride reacts vigorously with water to form a solution with a pH greater than 7.

• Each Al2Cl6 molecule found in aluminium chloride vapour contains two coordinate bonds.

• The bonding between aluminium and chlorine is strongly ionic due to the large difference in electronegativity.

How many moles of KNO3 are contained in the sealed tube?

• 4.81 × 10–4

• 9.63 × 10–4

• 1.93 × 10–3

• 9.63 × 10–1

For which pair is the boiling point of the first compound higher than the boiling point of the second compound?

• CH3CH2OH and CH3CH2SH

• CH3CO2CH3 and CH3CH2CO2H

• CH3OCH3 and CH3CH2OH

• CH3CH2CHO and CH3CH2CO2H

What is the correct expression to calculate Q?

• 2 × [CO2(g)] – 3 × [H2(g)]

• 3 × [H2O(g)] + 2 × [CO2(g)]

• 2 × [CO2(g)] – 3 × [H2(g)]

• 3 × [H2O(l)] + 2 × [CO2(g)]

What is the value of the enthalpy change of neutralisation, ΔHneut?

• x

• x – y

• x/2

• (x + y)/2