Case study·Standard multi-step (3/5)·No calculator
Difficulty guide
The label describes the problem, not your ability.
1/5 - Foundational
Warm-up setup; checks one basic idea.
2/5 - Routine exam skill
Normal syllabus skill; usually one main rule or interpretation.
3/5 - Standard multi-step
Exam-style problem with multiple steps or a common trap.
4/5 - Hard exam skill
High-end exam problem; combines methods carefully.
5/5 - Challenge
Stretch problem beyond normal exam pressure.
Question
A catalyst sample contains finely divided nickel. In one experiment it speeds up hydrogenation of an alkene. In another observation, small carbon atoms enter a transition-metal lattice to produce a hard solid.
Total: 3 marks
(a) Name the transition-metal property involved in hydrogenation. (1 mark)
(b) What type of compound is suggested by carbon atoms entering lattice holes? (1 mark)
(c) Give one reason transition metals can show catalytic activity. (1 mark)
Something wrong with this item?