GCSE| Edexcel|Chemistry P2F (Nov 2021)

• is brittle

• is not transparent

• does not conduct electricity

• does not dissolve in water

Name a material from Figure 2 that would be suitable for coating the metal wire.

Which type of particle moves through the metal wire to allow it to conduct electricity?

• atoms

• electrons

• neutron

• protons

There are some concerns that nanoparticles may cause harm if they enter the human body.

(i) Suggest one way that nanoparticles can enter the human body.

(ii) Suggest one possible risk if nanoparticles enter the human body.

The student kept the volume of sulfuric acid the same when they repeated the method at 50°C.

State two other variables that should be kept the same.

Which piece of equipment can be used to find the volume of 25cm3 of sulfuric acid?

• balance

• measuring cylinder

• ruler

• thermometer

State how the student will know that the reaction has finished.

The reaction at 50°C was faster than the reaction at 30°C.

Give one reason, in terms of particles, why the reaction at 50°C was faster than the reaction at 30°C.

At 50°C, 15.0cm3 of gas was produced during the first 60 seconds of the reaction.

Calculate the average rate of reaction, in cm3 s–1, for the first 60 seconds of the reaction.