Question 3
Question 3 of 40
Question image for Q3
Periodic Table
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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
4. Electrochemistry
4.2. Hydrogen–oxygen fuel cells

State that a hydrogen–oxygen fuel cell uses hydrogen and oxygen to produce electricity with water as the only chemical product

12. Experimental techniqu...
12.4. Separation and purification

Describe and explain methods of separation and purification using: (a) a suitable solvent (b) filtration (c) crystallisation (d) simple distillation (e) fractional distillation

11. Organic chemistry
11.3. Fuels

Describe the separation of petroleum into useful fractions by fractional distillation