Skip to content

Course home

Question bank·6.1 Improving processes and products
Sign up

6.1 Improving processes and products

EasyMediumHard
1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374
Question 23

A land-restoration project grows plants on waste from an old mine so that their roots absorb metal ions.

The harvested crop is burned, and 0.60 tonnes of ash is sent to a metal recovery unit. The ash contains 12% metal by mass. The unit recovers 75% of the metal present in the ash.

1 tonne = 1000 kg

What mass of metal is recovered?

[1]
A

450 kg

B

5.4 kg

C

54 kg

D

72 kg

Markscheme

6.1 Improving processes and products Questions

  1. GCSE
  2. /Chemistry
  3. /6.1 Improving processes and products

136 exam-style questions on OCR GCSE Chemistry 6.1 Improving processes and products, covering 6.1.1 Extracting metals industrially and by electrolysis, 6.1.2 Life cycle assessment and recycling, 6.1.3 Biological methods of metal extraction, 6.1.4 The Haber process and the production of fertilisers, 6.1.5 Alloys and their uses, 6.1.6 Corrosion and its prevention, 6.1.7 Comparing and selecting materials, and 6.1.8 Industrial conditions, rate and position of equilibrium. Each one has a worked solution and a mark scheme showing where the marks go.

More questions