1. Which of the following is not a metal?
(a) Copper
(b) Sulphur
(c) Aluminium
(d) Iron
2. The substance that will be flattened on beating with a hammer is
(a) Crystal of iodine
(b) Lump of sulphur
(c) Piece of coal
(d) Zinc granule
3. Boojho has learnt that non-metals on beating with a hammer are generally broken into pieces. Which of the following is a nonmetal?
(a) Iron nail
(b) Aluminium wire
(c) Copperplate
(d) Piece of coal
4. Materials which can be drawn into wires are called ductile. Which of the following is not a ductile material?
(a) Silver
(b) Copper
(c) Sulphur
(d) Aluminium
5. Metals are generally hard. Which of the following metals is an exception and can be cut with a knife?
(a) Iron
(b) Sodium
(c) Gold
(d) Magnesium
.
6. Metals are generally solid. Which of the following metals is in the liquid state at room temperature?
(a) Mercury
(b) Silver
(c) Aluminium
(d) Sodium
7. Metals generally react with dilute acids to produce hydrogen gas. Which one of the following metals does not react with dilute hydrochloric acid?
(a) Magnesium
(b) Aluminium
(c) Iron
(d) Copper
8. Which of the following reacts with cold water vigorously?
(a) Carbon
(b) Sodium
(c) Magnesium
(d) Sulphur
9. The metal which produces hydrogen gas on reaction with dilute hydrochloric acid as well as sodium hydroxide solution is
(a) Copper
(b) Iron
(c) Aluminium
(d) Sodium
10. Which of the following non-metals reacts and catches fire on exposure to air?
(a) Phosphorus
(b) Nitrogen
(c) Sulphur
(d) Hydrogen
11. Generally, metallic oxides are basic and non-metallic oxides are acidic in nature. The solution of which of the following oxides in water will change the colour of blue litmus to red?
(a) Sulphur dioxide
(b) Magnesium oxide
(c) Iron oxide
(d) Copper oxide
12. Which of the following property is not responsible for copper to be used as electrical conduction wires?
(a) Ductility
(b)Colour
(c) Good conductor of electricity
(d) It is solid
Very Short Answer Questions
13. Name two soft metals which can be cut with a knife.
14. Which non-metal is essential for our life and all living beings inhale it during breathing?
15. Name two major non-metals which are present in fertilisers and enhance the growth of plants.
16. Which non-metal is used to disinfect water?
17. A purple coloured non-metal form a brown solution in alcohol which is applied on wounds as an antiseptic. Name the nonmetal.
18. Zinc sulphate forms a colourless solution in water. Will you observe any colour on adding copper turning in it?
19. Why are bells made of metals?
20. Which liquid metal is used for making thermometers?
21. Which of the following metals can displace the other two metals from their salt solutions?
Short Answer Questions
22. Paheli bought a statue made of copper. To her surprise, it acquired a dull green coating after a couple of months. Explain the reason.
23. In Fig 4.1 you find that the bulb glows when an iron nail is placed between two ends of the wire. Complete the following sentences on the bases of this fact.
(a) __________ is a metal.
(b) Metals are good __________ of electricity.
24. If in Fig. 4.1 iron nail is replaced by a wooden stick, will the bulb glow or not? Justify your answer
25. Paheli prepared a blue coloured solution of copper sulphate in beaker A and placed an iron nail in it. Boojho prepared a yellowish-green solution of ferrous sulphate in beaker B and placed a copper wire in it. What changes will they observe in the two beakers after an hour?
No comments:
Post a Comment