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 35

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IMPORTANT

Earn 100

Calcium is a reactive metal than sodium. (more/ less)

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Important Questions on Metals And Non-Metals

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Science for Tenth Class Part - 2 Chemistry>Chapter 3 - Metals And Non-Metals>Short Answer Type Questions>Q 36

What is meant by saying that the metals are malleable and ductile? Explain with examples.

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10th CBSE

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Science for Tenth Class Part - 2 Chemistry>Chapter 3 - Metals And Non-Metals>Short Answer Type Questions>Q 36

Name two metals which are both malleable and ductile.

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Science for Tenth Class Part - 2 Chemistry>Chapter 3 - Metals And Non-Metals>Short Answer Type Questions>Q 36

Which property of an iron metal is utilised in producing iron sheets required for making buckets?

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10th CBSE

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Science for Tenth Class Part - 2 Chemistry>Chapter 3 - Metals And Non-Metals>Short Answer Type Questions>Q 36

Which property of a copper metal is utilised in making thin wires?

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Science for Tenth Class Part - 2 Chemistry>Chapter 3 - Metals And Non-Metals>Short Answer Type Questions>Q 37

Name two metals which react violently with cold water. Write any three observations you would make when such a metal is dropped into water. How would you identify the gas evolved, if any, during the reaction?

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10th CBSE

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Science for Tenth Class Part - 2 Chemistry>Chapter 3 - Metals And Non-Metals>Short Answer Type Questions>Q 38

With the help of examples describe how metal oxides differ from non-metal oxides.

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Science for Tenth Class Part - 2 Chemistry>Chapter 3 - Metals And Non-Metals>Short Answer Type Questions>Q 38

Which of the following elements would yield an acidic oxide?

$N a, S, C, K, H$