Q27 of 9701_s12_qp_12

Question 27

Question 27 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

15. Halogen compounds

15.1. Halogenoalkanes

describe the elimination reaction with NaOH in ethanol and heat to produce an alkene as exemplified by bromoethane

17. Carbonyl compounds

17.1. Aldehydes and ketones

deduce the nature (aldehyde or ketone) of an unknown carbonyl compound from the results of simple tests (Fehling’s and Tollens’ reagents; ease of oxidation)

3. Chemical bonding

3.6. Intermolecular forces, electro...

(a) describe hydrogen bonding, limited to molecules containing N–H and O–H groups, including ammonia and water as simple examples (b) use the concept of hydrogen bonding to explain the anomalous properties of H\(_2\)O (ice and water): • its relatively high melting and boiling points • its relatively high surface tension • the density of the solid ice compared with the liquid water