level 3 test

• A

• B

• C

• D

• A

• B

• C

• D

• A

• B

• C

• D

What do the chemical symbols N₂ and Ni represent?

• A

• B

• C

• D

Tags

NGSS.MS-PS1-1

The diagrams show an investigation into the conditions needed for rusting of iron nails. The nails in tubes 1 and 2 rust within a few days.

Which conditions are required for rusting?

• Air alone

• Air and water

• Salt and water

• Water alone

A student put 25.0 cm³ of dilute hydrochloric acid into a conical flask. The student added 2.5 g of solid sodium carbonate and measured the change in temperature of the mixture. Which apparatus does the student need to use to obtain the most accurate results?

• balance, measuring cylinder, thermometer

• balance, pipette, stopwatch

• balance, pipette, thermometer

• burette, pipette, thermometer

A solid has a giant structure. It does not conduct electricity but does so when it is dissolved in water. What could the solid be?

• A

• B

• C

• D

The diagram shows a metal being extracted from its powdered ore. What happens to the ore in this reaction?

• It burns

• It is oxidised

• It is reduced

• It decomposes

Which diagram represents an alloy?

• A

• B

• C

• D

Which row in the table shows the relative charge of an electron and of a neutron?

• A

• B

• C

• D