SSC Worksheet for chapter-4 Metals and Non-Metals class 10

Worksheet For class 10

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Objective Type Questions

Q1. Which one of the following pairs will give displacement reactions?

1. NaCl solution and copper metal
2. MgCl₂ solution and aluminium metal
3. FeSO₄ solution and silver metal
4. Ag NO₃ solution and copper metal

Q2. Which one the following metals do not react with cold as well as hot water?

1. Na
2. Ca
3. Mg
4. Fe

Q3. Which one of following oxide(s) of iron would be obtained on prolonged reaction of iron with steam?

1. Feo
2. Fe₂O₃
3. Fe₃O₄
4. Fe₂O₃& Fe₃O₄

Q4. What happens when calcium is treated with water?

1. It does not react with water
2. It reacts violently with water
3. It reacts less violently with water
4. Bubbles of hydrogen gas formed stick to the surface of calcium.

Q5. Composition of aqua-regia is

1. Dil HCl: conc. HNO₃(3:1)
2. Conc. HCl: dil HNO₃(3:1)
3. Conc. HCl: conc. HNO₃(3:1)
4. Dil HCl : dil HNO₃

Q6. Which of the following non-metal is a liquid?

1. Carbon
2. Brominc
3. Phosphorous
4. Sulphur

Q7. Which of the following metal form an amphoteric oxide?

1. Na
2. Ca
3. Al
4. Cu

Q8. Which of the following non-metal is lustrous?

1. Sulphur
2. Oxygen
3. Nitrogen
4. Iodine

Q9. In stainless steel, iron is mixed with

1. Ni and Cr
2. Cu and Cr
3. Ni and Cu
4. Cu and Au

Q10. Which of the following are not ionic compounds?

1. KCl
2. HCl
3. CCl₄
4. NaCl

Subjective Type Questions

Q11. A metal A, which is uses in termite process, when heated with oxygen gives an oxide B, Which is amphoteric in nature, identify A and B. write down reactions of oxide B with the and NaOH.

Q12. Give the reaction involved during extraction of zinc from its ore by

1. Roasting of zinc ore
2. Calcinations of zinc ore.

Q13. What are constituents of solder alloy? Which property of solder makes it suitable for welding electrical wires?

Q14. Explain the following

1. Reactivity of Al decrease of dipped in HNO₃?
2. Difference between ores and minerals
3. Tarnished copper utensils are cleansed with time juice or tamarind

Q15. Give the formulae of the stable binary compounds that would be formed by the combination of following pairs of elements

1. Mg and N₂
2. Li and O₂
3. Al and Cl₂
4. K and O₂

Answer Key : Metal and Non-metals

1. (d)

2. (d)

3. (c)

4. (c, d)

5.. (c)

6. (b)

7. (c)

8. (d)

9. (a)

10. (b, c)

 

Solutions :

Ans 11. A is aluminium (Al) and

B is Al₂O₃ (aluminium oxide)

1. Al₂O₃ + 6HCl→2 AlCl₃ + H₂O
2. Al₂O₃ + 2 NaOH→2 NaAlO₂ + H₂O

Ans 12. (a) Roasting 2ZnS + 3O₂ 2ZnO + 2SO₂

Zno + CZn + CO(g)

Calcination ZnCO₃ Zno + CO₂

Zno + C Zn + CO

Ans 13. Solder is an alloy of Pb (lead) and Sn (tin), its lower melting point makes it suitable for welding electrical wires.

Ans 14. Because HNO₃ renders aluminium passive due to the formation of an oxide film on its surface.

• An ore is a mineral from which metal can be extracted economically. While mineral is native form in which metal exist.

All ore are mineral, but all minerals are not necessarily ore.

e.g. Aluminium is extracted from the ore bauxite.

• When copper utensils are exposed to moist air, they get tarnished or corroded due to the formation of green copper carbonate. When these tarnished vessels are rubbed with lime juice or tamarind the weak acids present in then dissolve the green copper carbonate and original shine returns.

Ans. 15. Mg₃N₂

1. H₂O
2. AlCl₃
3. K₂O