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Explain why some rubber-like substances ...

Explain why some rubber-like substances contract with rising temperature.

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Knowledge Check

  • A: Above curie-point a ferromagnetic substance behaves as a paramagnetic substance. R: Magnetic susceptibility of a diamagnetic substance increases with rise in temperature.

    A
    If both Assertion & Reason are the true and the reason is the correct explanation of the assertion, then mark (1)
    B
    If both Assertion & Reason are true but the reson is not the correct explanation of the assertion, then mark (2)
    C
    If Assertion is true statement but Reason is false, then mark (3)
    D
    If both Assertion and Reason are false statements, then mark (4)

  • The solubility of which among the following substances, decrease with rise in temperature?

    A
    `NH_(4)Cl`
    B
    `KNO_(3)`
    C
    `Na_(2)S_(2)O_(3)`
    D
    `Ca(OH)_(2)`

  • The substance which contracts on heating is

    A
    silica glass
    B
    iron
    C
    inva steel
    D
    aluminum

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