Home
Class 12
CHEMISTRY
Duralumin is used in aircraft industry f...

Duralumin is used in aircraft industry for its light weight and high strength . It is an alloy of

A

Al, Cu, Mg and Mn

B

Al, Zn, Fe and Sn

C

Al, Tl, Ce and Fe

D

Al, Fe, Zn and Sn.

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • MOCK TEST PAPER - 1

    MODERN PUBLICATION|Exercise MCQs|60 Videos
  • MOCK TEST PAPER - 4

    MODERN PUBLICATION|Exercise MCQs|59 Videos

Similar Questions

Explore conceptually related problems

A metal X is used extensively in making aeroplane bodies as it is light in weight it is also used in extraction of metals by displacement reaction. The metal obtained during one such displacement is a molten metal as the reaction involved is hightly exothermic. The reaction mentioned above is used in joining railway tracks. a. Identify the metal X. b. What is the reaction mentioned above called? c.Write the chemical reaction for the above reaction.

A straight horizontal rod of mass 30 grams and length 0.3m is placed in a uniform horizontal magnetic field of strength 0.2 T perpendicular to the rod. Calculate the current through the rod, if the force on it just balances its weight. g=9.8ms^(-2).

Explain the following. a] Why is tungsten used almost exclusively for filament of electric lamps? b] Why are the conductors of electric heating devices, such as bread-toasters and electric irons made of an alloy rather than a pure metal? c] Why is the series arrangement not used for domestic circuits? d] How does the resistance of a wire vary with its area of cross-section? e] Why are copper and aluminum wires usually employed for electricity transmission?

A rectangular beam which is supported at its two ends and loaded in the middle with weight W sags by an amount delta such that delta=(Wl^(3))/(4Yd^(3)x), where l , d and Y represent length, depth and elasticity respectively. Guess the unknown factor using dimensional considerations :

The resistance offered by a wire of unit length and unit cross-sectional area is called resistivity. For a material irrespective of length and area, the resistivity is constant. It is also called specific resistance of the material. Metals and alloys have low resistivity while insulators have high resistivity. Resistivity of two elements A and B are 1.62 xx 10^(-8) Omega m and 520 xx10^(-8) Omega m respectively. Out of these two, name the element that can be used to make : (i) filament of electric bulb. (ii) wires for electrical transmission lines.

MODERN PUBLICATION-MOCK TEST PAPER - 3-MCQs
  1. Components, A and B, respectively of an ideal binary solution. If XA ...

    Text Solution

    |

  2. An element (atomic mass = 60) having fcc structure has density of 6.23...

    Text Solution

    |

  3. The product Z in the following series of reaction is : CH3CH2 -overs...

    Text Solution

    |

  4. Equivalent conductivity at infinite dilution for sodium-potassium oxa...

    Text Solution

    |

  5. A first order reaction is 60% complete in 20 minutes . How long will t...

    Text Solution

    |

  6. The Henry's law constant for the solubility of nitrogen gas in water a...

    Text Solution

    |

  7. Which of the following statements are correct ? (I) Among the speci...

    Text Solution

    |

  8. Milk is an example for

    Text Solution

    |

  9. Duralumin is used in aircraft industry for its light weight and high s...

    Text Solution

    |

  10. The number of P-OH bonds in diphosphoric acid, orthophosphoric acid, p...

    Text Solution

    |

  11. The number of acidic protons in H3PO3 are :

    Text Solution

    |

  12. The equivalent weight of K2Cr2O7 in acidic medium is expressed in term...

    Text Solution

    |

  13. The metal-carbon bond in metal carbonyls prossesses :

    Text Solution

    |

  14. A solution of (-) -1-chloro-1-phenylethane in toluene racemises slowly...

    Text Solution

    |

  15. Ortho- nitrophenol is less soluble in water than p-and m-nitrophenols ...

    Text Solution

    |

  16. Conversion of benzene to acetophenone can be brought by

    Text Solution

    |

  17. Nitrobenzene on reaction with conc. HNO3//H2SO4 at 80 - 100^@C forms w...

    Text Solution

    |

  18. The repeating unit present in Nylon 6 is :

    Text Solution

    |

  19. Polysaccharides have … linkages.

    Text Solution

    |

  20. The first antibiotic produced is :

    Text Solution

    |