Q10.
Which of these statements best describes a dative covalent bond?
(Total 1 mark)
Q11.
Which type of bond is formed between N and B when a molecule of NH3 reacts with a molecule of BF3?
(Total 1 mark)
Q12.
Ammonia reacts with aluminium chloride as shown by the equation:
(a) Draw diagrams to illustrate the shapes of NH3 molecules and of AlCl3 molecules.
Include in your diagrams any lone pairs of electrons that influence the shape.
Indicate the values of the bond angles.
(3)
(b) Name the type of bond formed between N and Al in H3NAlCl3 and explain how this bond is formed.
(2)
(c) Explain how the value of the Cl-Al-Cl bond angle in AlCl3 changes, if at all, on formation of the compound H3NAlCl3
(2)
(Total 7 marks)