Redox Reaction

Cl₂ + 2e- --> 2Cl ^- is an example of:

• a chemical reaction

• redox

• oxidation

• reduction

Tags

NGSS.HS-PS1-2

Defined as the loss of electrons.

• oxidation

• reduction

• redox

• OIL RIG

Tags

NGSS.HS-PS1-2

What is the oxidation number of Cr in Cr₂O₇^2- ?

• +14

• +6

• -6

• -14

Tags

NGSS.HS-PS1-2

What is the reducing agent here: N₂ + 3H₂ --> 2NH₃

• N₂

• H_2

• NH₃

• 2NH₃

Tags

NGSS.HS-PS1-2

If in a reaction, copper is reduced; its number of electrons has:

• Increased
• Decreased
• Remained Constant
• Varies Randomly

Tags

NGSS.HS-PS1-2

Iron (II) ions, Fe²⁺ in a solution can be changed to iron (III), Fe³⁺ by adding solution X. What is X?

• Sodium hydroxide

• Sodium thiosulphate

• Potassium hexacyanoferrate(II)

• Acidified potassium manganate (VII)

Which substance is an oxidising agent?

• Bromine water

• Magnesium powder

• Iron(II) chloride solution

• Potassium iodide solution

Tags

NGSS.HS-PS1-2

Which of the following are redox reaction?

• Igniting the gas stove

• Washing oil-stained clothes using detergenet

• Rusting of car's body

• Using hot pack to relieve muscle pain

Iron rusts in the presence of oxygen and water. Which method causes iron to rust faster?

• Coating iron with tin

• Touching iron with lead

• Galvanising iron with zinc

• Connecting iron to magnesium

Tags

NGSS.HS-ETS1-3

A method to control the rusting of underground iron pipelines is through sacrificial protection. Which of the following is the sacrificial metal?

• Copper

• Lead

• Tin

• Zinc

Tags

NGSS.HS-ESS3-4