1.1. Solids, liquids and gases
A subsection of Chemistry, 0620, through 1. States of matter
Listing 10 of 178 questions
Use ideas about the movement and arrangement of particles to explain why: ● solids have a definite volume and shape, ● liquids have a definite volume but no definite shape, ● gases have no definite volume or shape. The table shows some properties of six substances, A to F, which are either solids or liquids at room temperature. substance melting point / °C electrical conductivity solubility in water A +3550 does not conduct in any state insoluble B +44 does not conduct in any state insoluble C +1660 conducts when solid or liquid insoluble D +681 only conducts when in aqueous solution or liquid soluble E –39 conducts when solid or liquid insoluble F –11 does not conduct in any state insoluble Which substance has a giant covalent structure? Which two substances are liquids at room temperature? Which two substances are metals? Which two substances are simple molecules? Dry air contains mainly nitrogen, noble gases and oxygen. Which one of the following shows the correct composition of dry air? Tick one box. nitrogen 21%, oxygen 78%, noble gases 1% nitrogen 1%, oxygen 78%, noble gases 21% nitrogen 69%, oxygen 21%, noble gases 10% nitrogen 78%, oxygen 21%, noble gases 1% Metals can be joined together by high temperature welding. This process is sometimes carried out in the presence of argon. Suggest why welding is carried out in the presence of argon.
0620_w14_qp_23
THEORY
2014
Paper 2, Variant 3
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Questions Discovered
178