6th grade materials and their properties

Question 1

Nail varnish does not dissolve in water but does dissolve in acetone. What does this show?

• A. Nail varnish is a gas
• B. Water dissolves everything
• C. Acetone is a solute
• D. Whether a substance dissolves depends on the solvent

Question 2

Which word describes this: the clear mixture made when sugar dissolves in water?

• A. solvent
• B. insoluble
• C. solution
• D. saturated solution

Question 3

30 g of salt is dissolved in 150 g of water. What is the mass of the solution, in g?

Answer g

Question 4

Is this property typical of metals or non-metals: a poor conductor of heat (insulator)?

• A. typical of metals
• B. typical of non-metals

Question 5

Metals and non-metals: which statement is NOT true?

• A. Copper is used in wires because it is ductile and a good conductor.
• B. Mercury is a metal that is liquid at room temperature.
• C. All metals are solid at room temperature.
• D. Most elements in the periodic table are metals.

Question 6

An element has these properties: shiny reddish-brown solid, excellent conductor, can be drawn into wires. Is it a metal or a non-metal?

• A. metal
• B. non-metal

Question 7

Which technique is best to separate sand from water?

• A. fractional distillation
• B. evaporation or crystallisation
• C. chromatography
• D. filtration

Question 8

A mixture contains iron filings and sulfur powder. What is the quickest way to separate them?

• A. distil them
• B. filter them
• C. use a magnet
• D. use chromatography

Question 9

A student adds salt to water until some stays on the bottom however much they stir. What have they made?

• A. a pure substance
• B. a gas
• C. a saturated solution
• D. an insoluble solvent

Question 10

Which word describes this: a solution in which no more solute will dissolve?

• A. insoluble
• B. saturated solution
• C. solution
• D. solute

Question 11

At 20 °C, 32 g of potassium nitrate dissolves in 100 g of water to make a saturated solution. What mass dissolves in 50 g of water at 20 °C, in g?

Answer g

Question 12

Is this property typical of metals or non-metals: rings when struck (sonorous)?

• A. typical of metals
• B. typical of non-metals

Question 13

Metals and non-metals: which statement is NOT true?

• A. Most elements in the periodic table are metals.
• B. Mercury is a metal that is liquid at room temperature.
• C. Non-metals are always gases.
• D. Graphite is a form of carbon that conducts electricity.

Question 14

An element has these properties: silvery liquid at room temperature, conducts electricity. Is it a metal or a non-metal?

• A. metal
• B. non-metal