Corrosion and its Prevention | Metals and Non-Metals | Assessment | English | Grade 10

Name the metal which is used for galvanising iron.

• Al

• Cu

• Zn

• Co

Answer explanation

Zinc is used to galvanise iron articles.

Ways to prevent the rusting of iron are:

• Painting

• Oiling

• Greasing

• All of the Above

Answer explanation

Oiling, painting and greasing create a protective layer and hereby prevents rusting.

Tags

NGSS.MS-ETS1-3

Conditions necessary for rusting of iron are ___________________ .

• Presence of oxygen

• presence of moisture

• Both 1 and 2

• None of the above

Answer explanation

Essential conditions for rusting to occur are first, presence of oxygen and second, the presence of moisture.

Name an alloy of lead and tin.

• Calamine

• Oxide

• Solder

• Turmeric

Answer explanation

Solder is an alloy of lead and tin.

Amalgam is ________________.

• an alloy of one metal with hydrogen

• an alloy of mercury metal with one or more other metals

• alloy with tin

• None of the above

Answer explanation

An alloy of mercury metal with one or more other metals is called as an amalgam.