Home
Class 10
CHEMISTRY
Give reason : (i) "Alloys of iron are ...

Give reason :
(i) "Alloys of iron are more useful when compared to pure iron"
(ii) Alumunium oxide is called amphoteric oxide

Text Solution

Verified by Experts

(i) Pure iron is very soft
Stretches, when easily wher hot
Alloys are hard
The properties of iron can be changed if it is mixed with other substances.
(ii) Aluminium oxide `(Al_(2)O_(3))` reacts with both acids as well as bases to produce salt and water.
Promotional Banner

Topper's Solved these Questions

  • MOST LIKELY QUESTION PAPER - 9

    CPC CAMBRIDGE PUBLICATION|Exercise QUESTIONS|37 Videos

  • METALS AND NON-METALS

    CPC CAMBRIDGE PUBLICATION|Exercise UNIT TEST|8 Videos

  • MOST LIKELY QUESTION PAPER- 7

    CPC CAMBRIDGE PUBLICATION|Exercise 1. Answer thefollowing questions|5 Videos

Similar Questions

Explore conceptually related problems

Give reasons: (i) "Alloys of iron are more useful when compared to pure iron." (ii) Copper loses its brown layer gradually when exposed to air. (iii) Aluminium oxide is called amphoteric oxide.

Give reason: Chemical reaction does not take when copper is added to iron sulphate solution.

Give reason: i) Actinoid contraction is greater from element to element. ii) Actinoids show variable oxidation states.

Give reason: (i) Methyl amine is soluble in water but not in aniline. (ii) Methyl amine is more basic than ammonia.

a) Give reason: i) Fluorine exhibits only one oxidation state whereas other halogens exhibit multiple oxidation states. ii) Most of the reactions with fluorine are exothermic.

Write the balanced chemical equations for the following reactions : (i) When copper is heated in air. (ii) When aluminium oxide reacts with sodium hydroxide.

Give reason : (i)Boron is used as control rods in nuclear reactor. (ii) Graphite is soft and slippery.

Give reasons : (i) Sodium metal is stored under kerosene oil. (ii) Inspite of being highly reactive, aluminium is still used for making utensils.

CPC CAMBRIDGE PUBLICATION-MOST LIKELY QUESTION PAPER - 9-QUESTIONS
  1. Draw the ray diagrsm showing the position of the object and image to g...

    Text Solution

    |

  2. Why must we conserve our forest ? List sny two causes for deforestat...

    Text Solution

    |

  3. Give reason : (i) "Alloys of iron are more useful when compared to p...

    Text Solution

    |

  4. Metals are regarded as electropositive elements (ii) Articles of alu...

    Text Solution

    |

  5. (a) Which disease is caused in human beings due to depletion of ozone ...

    Text Solution

    |

  6. How does the electronic configuration of an atom of an element related...

    Text Solution

    |

  7. (i) How does the electronic configuration of an atom relates to its po...

    Text Solution

    |

  8. What is meant by electric current? Name and define its SI unit. In a...

    Text Solution

    |

  9. Write two points of dillerence between electric energy and electric po...

    Text Solution

    |

  10. Draw the diagram of arrangement of the apparatus to show the reaction ...

    Text Solution

    |

  11. What is Tyndall effect? What is its cause ? Name two phenomena observe...

    Text Solution

    |

  12. (a) What is myopia ? State the two causes of myopia (b) Why is the n...

    Text Solution

    |

  13. Draw a diagram of human brain label the parts. (i) Cranium (ii) Pi...

    Text Solution

    |

  14. (a) State in brief the functions of the following organs in the human ...

    Text Solution

    |

  15. Name the metal which reacts with a very dilute HNO(3) to evolve hydrog...

    Text Solution

    |

  16. Define genetics what is the contribution of Mendel in the field of gen...

    Text Solution

    |

  17. a) what is meant by analagous organs ? b) Define variation i...

    Text Solution

    |

  18. Stars appear to be twinkling but planets do not twinkle. Why? Explain ...

    Text Solution

    |

  19. Explain the following reactions with one example for each giving relev...

    Text Solution

    |

  20. Draw the structure of the following compounds and identify the functio...

    Text Solution

    |