Electricity from Chemicals

Why solid lithium bromide cannot conduct electricity?

• Because it is too concentrated

• Because it is too large

• Because there is no movement of ions

• Because there is no metal in it

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-3

What is the product at the anode?

• Oxygen gas

• Lithium metal

• Iodine gas

• Hydrogen gas

What is/are the product/s at the electrodes?

• Sodium metal

• Hydrogen gas

• Oxygen gas

• Chlorine gas

Tags

NGSS.HS-PS2-5

Why zinc electrode becomes thinner?

• Because it undergoes oxidation

• Because it undergoes reduction

• Because acid corrodes zinc electrode

• Because zinc is too dilute

Why hydrogen gas is released when dilute sulphuric acid is electrolysed?

• Because hydrogen is less reactive than zinc in the reactivity series

• Because hydrogen can be found everywhere

• Because zinc is too dilute

• Because zinc is less reactive than hydrogen in the reactivity series

Which of the followings are correct?

• Tin electrode - anode

• Tin electrode - cathode

• Zinc electrode - anode

• Zinc electrode - cathode

Tags

NGSS.HS-PS2-5

What are the observation that can be observed from the electrolysis process?

• Bubbles of colourless gas

• Anode becomes thinner

• Cathode becomes thicker with brown solid

• Yellow-green gas is released

What is the term for the regular arrangement of particles in a crystalline solid?

• Enthalpy

• Lattice

• Electron configuration

• Electrochemistry

What is the definition of electrolyte?

What is/are the requirement for a compound to conduct electricity?

• Must contain free moving electron/s

• Must be a covalent compound

• Must be concentrated

• Must contain free moving ion/s