Home
Class 9
CHEMISTRY
Give reason: For welding of two metallic...

Give reason: For welding of two metallic pieces, an oxyhydrogen flame is used.

Text Solution

Verified by Experts

Because higher temperature is required to melt and weld two metals and oxy-hydrogen flame can attain temperature up to `2500^@C`.
Promotional Banner

Topper's Solved these Questions

  • STUDY OF THE FIRST ELEMENT - HYDROGEN

    ICSE|Exercise TOPIC 2 Properties of Hydrogen, Oxidation nd Reduction (2 MARKS QUESTIONS)|14 Videos

  • STUDY OF THE FIRST ELEMENT - HYDROGEN

    ICSE|Exercise TOPIC 2 Properties of Hydrogen, Oxidation nd Reduction (3 MARKS QUESTIONS)|14 Videos

  • STUDY OF THE FIRST ELEMENT - HYDROGEN

    ICSE|Exercise TOPIC 1 Hydrogen and its Laboratory Preparation (5 MARK QUESTIONS)|24 Videos

  • STUDY OF GAS LAWS

    ICSE|Exercise TOPIC 2 (5 Marks Questions ) |18 Videos

  • THE LANGUAGE OF CHEMISTRY

    ICSE|Exercise EXCERCISE 1(C ) (Correct the following statement)|21 Videos

Similar Questions

Explore conceptually related problems

Give reasons for the following in one or two sentences : 'Graphite is used as a solid lubricant.''

Give reasons for the following: a. Alkli metals do not occur free in nature. b. Alkali metal salts impart characteristic colour to the flame. c. Caesium is used in photoelectric cell. d. Alkali metals are good reducing agents in aqueous medium.

Give two important uses of zinc metal.

Give two reasons for electroplating an article.

Give reasons for the following: Alkali metals are good reducing agents.

Give reasons for the following: Alkali metals are good reducing agents.

Give Reason Conducting wires are made of metals.

Give reasons: Argon is used to fill light bulbs.

ICSE-STUDY OF THE FIRST ELEMENT - HYDROGEN-TOPIC 2 Properties of Hydrogen, Oxidation nd Reduction (1 MARK QUESTIONS)
  1. Metals like , and give H2 with steam. (iron, magnesium, aluminium, ...

    Text Solution

    |

  2. A metal.. hydrogen in the activity series gives hydrogen with ...........

    Text Solution

    |

  3. By increasing the pressure on the volume of an enclosed gas at constan...

    Text Solution

    |

  4. Helium is preferred to hydrogen for filling balloons because it is :

    Text Solution

    |

  5. Reacting with water, an active metal produces

    Text Solution

    |

  6. Name the following A metal oxide that can be reduced by hydrogen.

    Text Solution

    |

  7. For the reaction PbO + H2 to Pb + H2 O, which of the following stateme...

    Text Solution

    |

  8. Which of the following metals does not liberate hydrogen from acids?

    Text Solution

    |

  9. Select the odd one out and justify your answer. Zn, Fe, Mg and Na

    Text Solution

    |

  10. Select the odd one out and justify your answer. SO2, H2 S, NH3 and C...

    Text Solution

    |

  11. Select odd one and justify your answer : Mg, Zn, Fe, Cu

    Text Solution

    |

  12. Select the odd one out and justify your answer Fe , Pb , Al and Zn

    Text Solution

    |

  13. State whether the following conversions are oxidation or reduction rea...

    Text Solution

    |

  14. State whether the following conversions are oxidation or reduction rea...

    Text Solution

    |

  15. What do you observe when hydrogen gas is passed through soap solution ...

    Text Solution

    |

  16. Concentrated sulphuric acid is not used to dry hydrogen.

    Text Solution

    |

  17. State whether the compounds shown in bold letters are oxidised or red...

    Text Solution

    |

  18. Give reason: For welding of two metallic pieces, an oxyhydrogen flame ...

    Text Solution

    |

  19. Give reasons : Hydrogen is not used in balloons inspite of being the...

    Text Solution

    |

  20. Name : a solid that is an oxidizing agent.

    Text Solution

    |