NCERT Class 10 Science Chapter 3 Metals and Non-metals Extra Questions and Answers
Class 10 Science Chapter 3 Extra Questions and Answers – Metals and Non-metals. Here in this Page Class X Students can Learn Extra Questions & Answer 3rd Chapter Science fully Inside.
We Provided Here Metals and Non-metals Science Chapter 3 MCQ Questions, Very Short Type Questions and Short Type Questions.
Class 10 Science Chapter 3 Extra Question with Answer – Metals and Non-metals
Science Chapter 3 Metals and Non-metals Class 10 Inside 3 marks, 2 Marks & And 1 Marks Important Questions and Answers.
Q.1) MCQ
1) The ability of metals to be drawn into this wires is called ______.
a) Compressibility
b) Ductility
c) Malleability
d) None of the above
2) Which of the following is non-metal.
a) Calcium
b) Carbon
c) Zinc
d) Aluminium
3) Which of the following is liquid in state.
a) C
b) Ca
c) Br
d) O
4) Which of the following is liquid in state.
a) He
b) Hg
c) C
d) O
5) Which of the following metal having low melting point.
a) Gallium
b) Calcium
c) Strontium
d) Aluminium
6) Which of the following non-metal is lustrous.
a) f c) Br
b) Cl d) I
7) Reactive metals like sodium kept in ________.
a) Kerosene oil
b) Petrol
c) Diesel
d) Bio-oil
8) Impurities removed from the metal. This process known as ______.
a) Refining
b) Electroplating
c) Anodizing
d) None of these
9) If one of the metal presents in alloy is mercury, then its known as ___.
a) Steel
b) Amalgam
c) Brass
d) Copper
10) Brass is an alloy of _________.
a) Cu and Zn
b) Cu and Sn
c) Cu and Te
d) Cu and fe
Q.2) VERY SHORT ANSWERS
1) Explain Galvanization?
2) Name two metals which are found in nature in free state?
3) Define roasting with its equation?
4) Define minerals?
5) What happens when metal react with acid?
6) Give reaction between Calcium and water?
7) What happens when Copper burnt in air give reaction?
8) Give example of metal?
a) Which is liquid at room temperature.
b) Which can be cut with a knife
Q.3) SHORT ANSWER QUESTIONS
1) Explain Malleability and ductility?
2) State difference between metal and Non-metal?
3) What is anodizing?
4) What is Aqua regia?
5) Why do ionic compounds have high melting points?
6) What are amphoteric oxide, give example?
Q.4) LONG ANSWER QUESTION.
1) What is corrosion? State two ways to prevent rusting of iron?
State why silver articles gets black?
2) What happened when cinnabar (HgS) the ore of mercury is Extracted from cinnabar?
Answer Sheet
Q.1) MCQ
1) The ability of metals to be drawn into the this wires is called ______.
a) Compressibility
b) Ductility
c) Malleability
d) None of the above
2) Which of the following is non-metal.
a) Calcium
b) Carbon
c) Zinc
d) Aluminium
3) Which of the following is liquid in state.
a) C
b) Ca
c) Br
d) O
4) Which of the following is liquid in state.
a) He
b) Hg
c) C
d) O
5) Which of the following metal having low melting point.
a) Gallium
b) Calcium
c) Strontium
d) Aluminium
6) Which of the following non-metal is lustrous.
a) f c) Br
b) Cl d) I
7) Reactive metals like sodium kept in ________.
a) Kerosene oil
b) Petrol
c) Diesel
d) Bio-oil
8) Impurities removed from the metal. This process known as ______.
a) Refining
b) Electroplating
c) Anodizing
d) None of these
9) If one of the metal present in alloy is mercury, then its known as ____.
a) Steel
b) Amalgam
c) Brass
d) Copper
10) Brass is an alloy of _________.
a) Cu and Zn c) Cu and Te
b) Cu and Sn d) Cu and fe
Q.2) VERY SHORT ANSWERS
1) Explain Galvanization?
→ Galvanization is a method of protecting steel and iron from
Rusting by Coating them with thin layer of zinc.
2) Name two metals which are found in nature in free state?
→ 1) Gold (Au)
2) Silver (Ag)
3) Platinum (Pt)
3) Define roasting with its equation?
→ The Sulphide ores are converted into oxides by heating Strongly in the presence of excess of air. This process is called Roasting.
4) Define minerals?
→ The elements or compounds, which occur naturally in earth’s Crust are known as minerals.
5) What happens when metal react with acid?
→ Metal + Dilute acid → Salt + Hydrogen
Ms + 4 HCl → MgCl2 + H2
6) Give reaction between Calcium and water?
→ Ca + 2H2O → Ca (OH)2 + H2
7) What happens when Copper burnt in air give reaction?
→ 2 Cu + O2 → 2CuO
8) Give example of metal?
a) Which is liquid at room temperature.
→ (Hg) Mercury
b) Which can be cut with a knife.
→ Sodium (Na), Potassium (K)
Q.3) SHORT ANSWER QUESTIONS
1) Explain Malleability and ductility?
→The property of metals in which they can be drawn into thin sheets Is called as malleability.
The property of metals in which they can be drawn into thin wires is Called ductility.
2) State difference between metal and Non-metal?
→
Metal | Non-Metal |
1.Metals are solid at the
Room temperature except Hg. |
1.Non-Metals present in three
States solid, liquid and gases. |
2.Metals are Good Conductor of heat and
Electricity. |
2.Non-metals are poor conductor of heat and
Electricity. |
3.Metals are malleable. | 3.Non-metals are brittle. |
4.Metals are ductile. | 4.Non-metals are non-ductile. |
3.) What is anodizing?
→Anodizing is a process of farming a thick oxide layer of Aluminium develops a thin oxide layer when exposed to air. This Aluminium oxide coat makes it resistant to further corrosion.
4) What is Aqua regia?
→ Aqua regia is a freshly prepared mixture of concentrate hydrochloric acid and concentrate nitric acid in ratio of 3:1. It can dissolve gold, Even though neither of these oxides can do so alone.
Aqua regia is highly corrosive, fuming liquid.
5) Why do ionic compounds have high melting points?
→ Ionic compounds have high melting point because of considerable amount of energy is required to break the strong inner – ionic attraction.
6) What are amphoteric oxide, give example?
→ The oxides which behave as both acidic as well as basic are called as amphoteric oxides.
Example: – Aluminium oxide (Al2O3)
Zinc oxide (ZnO)
Q.4) LONG ANSWER QUESTION.
1) What is corrosion? State two ways to prevent rusting of iron? State why silver articles get black?
→ Corrosion is decay or destruction of metal when exposed to moisture or atmosphere e.g. rusting of iron
Two ways to prevent rusting of iron: –
1.) Painting
2.) Oiling
Silver articles becomes black after sometime when exposed to air.
This is because it reacts with sulphur in the air to form a coating of silver sulphide.
2) What happened when cinnabar (HgS) the ore of mercury is Extracted from cinnabar?
→ Cinnabar is one of mercury, when it is heated in air, it is first converted to into mercuric oxide (HgO). Mercuric oxide is then reduced to mercury on further heating.
These low in the activity series metals are very unreactive so
Can be heated alone.
2HgS + 3O2→ 2HgO + 2SO2
2HgO → 2Hg + O2
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