Q31 of 9701_w19_qp_12

Question 31

Question 31 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

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

14. Hydrocarbons

14.1. Alkanes

understand the general unreactivity of alkanes, including towards polar reagents in terms of the strength of the C–H bonds and their relative lack of polarity

12. Nitrogen and sulfur

12.1. Nitrogen and sulfur

explain the lack of reactivity of nitrogen, with reference to triple bond strength and lack of polarity