Exam code: 0653
Which statement describes the trends shown by the elements down Group I of the Periodic Table?
They become less dense and less reactive.
They become less dense and more reactive.
They become more dense and less reactive.
They become more dense and more reactive.
Choose your answer
Was this exam question helpful?
Aqueous bromine is added to aqueous sodium chloride.
Which statement describes the colour of the resulting mixture and explains the observation?
It is pale yellow-green because bromine is less reactive than chlorine.
It is pale yellow-green because bromine is more reactive than chlorine.
It is red-brown because bromine is less reactive than chlorine.
It is red-brown because bromine is more reactive than chlorine.
Choose your answer
Was this exam question helpful?
Which statements about the transition elements are correct?
They have low densities.
They form coloured compounds.
They often act as catalysts.
They have low melting points.
1 and 2 only
1 and 4 only
2 and 3 only
3 and 4 only
Choose your answer
Was this exam question helpful?
Which statement describes helium and neon?
They are diatomic and have high thermal conductivities.
They are diatomic and have low melting points.
They are monatomic and have high boiling points.
They are monatomic and have low electrical conductivities.
Choose your answer
Was this exam question helpful?