Corrosion is the damage caused to the metal by the chemical reaction of air, water and acids with the surface of the metal. Generally reactive metals corrode easily and non-reactive metals have good resistance to corrosion. For example, Copper reacts with moist carbon dioxide in the air and gets a green coat of copper carbonate.

Give the name and chemical formula of one ore of copper.

Copper glance is the name of the ore of copper and its chemical formula is Cu 2 S . It is a sulphide ore of Copper. Note: The main copper sulphide minerals are chalcopyrite ( CuFeS 2 ) chalcocite ( Cu 2 S ) , covellite ( CuS ) , bornite ( Cu 5 FeS 4 ) , tetrahedrite and enargite. The largest source of copper is from porphyry ore deposits in which one or a combination of the aforementioned minerals occurs.

Why do we apply paint on iron articles?

By painting the iron article we can prevent rusting. It prevents the contact of air and moisture with the iron that causes iron to rust. After painting iron surface does not come in contact with moisture and air which cause rusting.

Differentiate between metals and non-metals on the basis of their chemical properties.

Chemical properties of metals Chemical properties of non-metal Metals forms basic oxides. Non-metals forms acidic or neutral oxides. Chemical properties of metals Chemical properties of non-metal Metals displace hydrogen from water. Non-metals do not react with water. Chemical properties of metals Chemical properties of non-metal Metals displace hydrogen from dilute acids. Non-metals do not react with dilute acids.

E M B I B E

Science for Tenth Class Part - 2 Chemistry>Chapter 3 - Metals And Non-Metals>Very Short Answer Type Questions>Q 8

HARD

10th CBSE

IMPORTANT

Earn 100

What changes in the colour of iron nails and copper sulphate solution do you observe after keeping the iron nails dipped in copper sulphate solution for about $30$ minutes ?

Important Questions on Metals And Non-Metals

EASY

10th CBSE

IMPORTANT

Science for Tenth Class Part - 2 Chemistry>Chapter 3 - Metals And Non-Metals>Very Short Answer Type Questions>Q 9

What is aqua-regia? Name two special metals which are insoluble in common reagents but dissolve in aqua-regia.

EASY

10th CBSE

IMPORTANT

Science for Tenth Class Part - 2 Chemistry>Chapter 3 - Metals And Non-Metals>Very Short Answer Type Questions>Q 10

Give the names and formula of two acidic oxides.

EASY

10th CBSE

IMPORTANT

Science for Tenth Class Part - 2 Chemistry>Chapter 3 - Metals And Non-Metals>Very Short Answer Type Questions>Q 10

Give the names and formula of two basic oxides.

EASY

10th CBSE

IMPORTANT

Science for Tenth Class Part - 2 Chemistry>Chapter 3 - Metals And Non-Metals>Very Short Answer Type Questions>Q 11

What is the name given to those metal oxides which show basic as well as acidic behaviour?

MEDIUM

10th CBSE

IMPORTANT

Science for Tenth Class Part - 2 Chemistry>Chapter 3 - Metals And Non-Metals>Very Short Answer Type Questions>Q 12

Name two metals which form amphoteric oxides.

HARD

10th CBSE

IMPORTANT

Science for Tenth Class Part - 2 Chemistry>Chapter 3 - Metals And Non-Metals>Very Short Answer Type Questions>Q 13

A copper coin is kept immersed in a solution of silver nitrate for some time. What will happen to the coin and the colour of the solution?

HARD

10th CBSE

IMPORTANT

Science for Tenth Class Part - 2 Chemistry>Chapter 3 - Metals And Non-Metals>Very Short Answer Type Questions>Q 14

Which important property of copper and aluminium makes them suitable for making cooking utensils and boilers? (Electrical conductivity / Thermal conductivity)

EASY

10th CBSE

IMPORTANT

Science for Tenth Class Part - 2 Chemistry>Chapter 3 - Metals And Non-Metals>Very Short Answer Type Questions>Q 14

Which property of copper and aluminium makes them suitable for making electric wires?