CBSE Worksheet for Chapter - 2 Metals And Non - Metals Class 8

CBSE Worksheet for Chapter - 2 Metals And Non - Metals Class 8

Worksheets For class 8

Find CBSE Worksheet for chapter-2 Metals And Non - Metalstals class 8

1. CLASS-8
2. BOARD: CBSE
3. Chemistry Worksheet - 2
4. TOPIC: Metals And Non - Metalstals
5. For other CBSE Worksheet for class 8 Science check out main page of Physics Wallah.

SUMMARY

• Occurence of metals and non-metals, position in the periodic table.
• Physical properties of metals and non-metals.
• Chemical properties of metals and non-metals.
• Reactivity series.
• Uses of common metals and non-metals.

SECTION – 1

SECTION – 2

Now answer the following questions :

1. . Which of the following is a good conductor of heat ?
   1. Bromine
   2. Chlorine
   3. Mercury
   4. Iodine
2. . Which of the following non-metals occurs as a solid ?
   1. Sulphur
   2. Carbon
   3. Iodine
   4. All of these
3. . Which of the following metals has very low melting point and melts even in hand ?
   1. Sodium
   2. Gallium
   3. Potassium
   4. Graphite
4. . Tungsten is used in electric bulbs because –
   1. . it has high melting point
   2. . it is metallic
   3. . it has high tensile strength
   4. . it has high density
5. . The metal which reacts with water only when it is red hot & steam is passed over it, is .
   1. Sodium
   2. calcium
   3. iron
   4. magnesium
6. 6.Magnesium oxide is a –
   1. basic oxide
   2. acidic oxide
   3. neutral oxide
   4. None of these
7. 7. When iron is heated with chlorine gas, the product of the reaction is –
   1. FeCl ₂
   2. Fe ₂ Cl ₄
   3. FeCl ₃
   4. no reaction
8. 8. Which of the following is an example of amphoteric oxide ?
   1. ZnO
   2. CO
   3. Fe ₂ O ₃
   4. FeO
9. 9. Which metals occur in their native state in nature ?
   1. . Only noble metals
   2. . Noble and coinage metals
   3. . Metals below hydrogen in the electrochemical series
   4. . Anymetal depending upon its location of occurrence
10. 10. The non-metal which is used for the manufacture of fertilizers is-
    1. Chlorine
    2. Sulphur
    3. Phosphorus
    4. None of these
11. 11. Which metal reacts with dilute hydrochloric acid to produce hydrogen ?
    1. Zinc
    2. Copper
    3. Silver
    4. Platinum
12. 12. Name two metals which react with very dilute nitric acid to produce hydrogen gas.
13. 13. A,B and C are three metals which undergo chemical reactions according to the following equations :
    1. . A ₂ O + 2 B → B ₂ O ₃ + 2A
    2. . 3CSO₄ + 2B→ B₂(SO₄)₃ + 3C
    3. . 3CO + 2A→A₂O₃ + 3C
    1. . which element is most reactive
    2. . which element is least reactive
    3. . arrange these element in the order of increasing reactivity.
14. 14. Why are non-metals oxidizing agents ?
15. 15. Name the most abundant non-metal and most abundant metal in earth crust.
16. 16. Give the formula of non-metallic oxide which is known as laughing gas ?
17. 17. Which property of graphite is utilized in making electrodes ?
18. 18. Give example of two neutral and two acidic oxides of non-metals ?
19. 19. Give reasons for the following :
    1. . Electrical wires cannot be made out of phosphorous.
    2. . A saucepan cannot be made from sulphur.