Home / iGCSE Chemistry Multiple Choice (Extended) : 10.2 Fertilisers: Exam Style Questions Paper 2

iGCSE Chemistry Multiple Choice (Extended) : 10.2 Fertilisers: Exam Style Questions Paper 2

iGCSE Chemistry MCQ (Extended) Paper 2 - All Chapters
Question

Which mixture contains all of the elements in a typical NPK fertiliser?

A) ammonium nitrate and calcium phosphate
B) ammonium phosphate and potassium chloride
C) potassium nitrate and ammonium chloride
D) potassium carbonate and ammonium nitrate

▶️ Answer/Explanation
Solution

Ans: B

NPK fertilizers contain three essential elements for plant growth:

  • N – Nitrogen (found in ammonium compounds)
  • P – Phosphorus (found in phosphate compounds)
  • K – Potassium (found in potassium compounds)

Analyzing the options:

Option B (ammonium phosphate and potassium chloride) contains all three: – NH4H2PO4 (ammonium phosphate) provides N and P – KCl (potassium chloride) provides K

The other options are missing at least one element: – A lacks potassium – C lacks phosphorus – D lacks phosphorus

Question

A fertiliser contains ammonium nitrate and potassium phosphate.

Why is the fertiliser described as an NPK fertiliser?

A) It provides nitrogen, which is an essential element for improved plant growth.
B) It contains the element oxygen, which neutralises acidic soil.
C) It contains the elements nitrogen and phosphorus.
D) It provides the three main elements needed for improved plant growth.

▶️ Answer/Explanation
Solution

Ans: D

NPK fertilisers provide the three main essential elements for plant growth: Nitrogen (N), Phosphorus (P), and Potassium (K). Ammonium nitrate provides nitrogen (N), potassium phosphate provides phosphorus (P) and potassium (K). Therefore, option D is correct as it mentions all three elements. Option A mentions only nitrogen, option C misses potassium, and option B is irrelevant (oxygen isn’t a primary nutrient).

Question

Fertilizers are used to provide three of the elements needed for plant growth.

Which two compounds would give a fertilizer containing all three of these elements?

  1. Ca(NO3)2 and (NH4)2SO4
  2. Ca(NO3)2 and (NH4)3PO4
  3. KNO3 and (NH4)2SO4
  4. KNO3 and (NH4)3PO4
Answer/Explanation

Ans:

D

Question

 Which statements about sulfur dioxide are correct?

  1. Sulfur dioxide decolourises acidified potassium manganate(VII).
  2. Sulfur dioxide forms when acids react with carbonates.
  3. Sulfur dioxide is used as a bleach.
  4. Sulfur dioxide is used to treat acidic soil.

A 1 and 3               B 1 and 4                C 2 and 3                 D 2 and 4

Answer/Explanation

Ans:

A

More iGCSE Chemistry Paper 2 Questions.............
Scroll to Top