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6.1 Improving processes and products

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Question 4

A fruit grower's soil already contains enough nitrogen and phosphorus, but the trees need more potassium.

Which pair of compounds would supply potassium without adding any nitrogen or phosphorus?

[1]
A

KNO3\mathrm{KNO_{3}}KNO3​ and KCl\mathrm{KCl}KCl

B

(NH4)2SO4\mathrm{(NH_{4})_{2}SO_{4}}(NH4​)2​SO4​ and K2SO4\mathrm{K_{2}SO_{4}}K2​SO4​

C

KCl\mathrm{KCl}KCl and K2SO4\mathrm{K_{2}SO_{4}}K2​SO4​

D

(NH4)3PO4\mathrm{(NH_{4})_{3}PO_{4}}(NH4​)3​PO4​ and K2SO4\mathrm{K_{2}SO_{4}}K2​SO4​

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.

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