UNIT 6: REACTIVITY

Under which oil, reactive metals are kept?

• Petroleum

• Gasoline

• Kerosene

• Crude oil

Why potassium looks dull, when it is out of its container?

• Because it is not in use

• Because it reacts with the moisture in the air

• Because it is not heated up

• Because the surface of potassium is dull

Metal + Water → metal oxide + hydrogen

• False

• True

why magnesium reaction is more vigorous than in water? Click any two

• No, magnesium reacts in water vigorously

• Because it forms a barrier which prevents for further reaction.

• Because magnesium is soluble in water.

• Because in water magnesium hydroxide is insoluble

Iron sulfate + Copper → Copper sulfate + Iron

Is this is a displacement reaction??

• Yes

• No

What provides the energy to start a displacement reaction between the aluminium and iron oxide?

• Calcium powder

• Magnesium powder

• Sodium Nitrate

• Barium Nitrate

How was today's presentation and the explanation? Give the feedback of today's class.