Q20 of 5070_w24_qp_12

Question 20

Question 20 of 40

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No letter options?

Older MCQs might not have the typical A, B, C, D choices. They have choices 1, 2, 3, and a combination of them is the answer. Below is the key that maps such combinations to the answer.

A 1, 2 and 3 are correct

B 1 and 2 only are correct

C 2 and 3 only are correct

D 1 only is correct

Topics Tested

6. Chemical reactions

6.4. Redox

Define an oxidising agent as a substance that oxidises another substance and is itself reduced

6. Chemical reactions

6.3. Reversible reactions and equil...

State the sources of the sulfur dioxide (burning sulfur or roasting sulfide ores) and oxygen (air) in the Contact process