DP Chemistry (first assessment 2025)
Question 19N.1A.SL.TZ0.3
| Date | November 2019 | Marks available | [Maximum mark: 1] | Reference code | 19N.1A.SL.TZ0.3 |
| Level | SL | Paper | 1A | Time zone | TZ0 |
| Command term | Identify | Question number | 3 | Adapted from | N/A |
3.
[Maximum mark: 1]
19N.1A.SL.TZ0.3
Which is correct?
A. Mixtures are either homogeneous or heterogeneous and their chemical properties are an average of the individual component properties.
B. Mixtures are never heterogeneous and their chemical properties are an average of the individual component properties.
C. Mixtures are either homogeneous or heterogeneous and the components retain their individual chemical properties.
D. Mixtures are never homogeneous and the components retain their individual chemical properties.
[1]
Markscheme
C
Syllabus sections
Structure 1. Models of the particulate nature of matter » Structure 1.1—Introduction to the particulate nature of matter » Structure 1.1.1- Elements, compounds and mixtures. Elements are the primary constituents of matter, which cannot be chemically broken down into simpler substances. Compounds consist of atoms of different elements chemically bonded together in a fixed ratio. Mixtures contain more than one element or compound in no fixed ratio, which are not chemically bonded and so can be separated by physical methods. Distinguish between the properties of elements, compounds and mixtures.