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d and f-Block Elements Test - 20
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d and f-Block Elements Test - 20

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  • Question 1/5
    1 / -0

    (T) imparts violet colour (V) Red gas (W) Red ppt.

    (W) Red ppt.  white ppt.

    (U)  gas (gives white fumes with HCl)

    sublimes on heating Identify (T) to (Z).

    Solutions

    The correct answer is option B

  • Question 2/5
    1 / -0

    The number of moles of acidified KMnO4 required to convert one mole of sulphite ion into sulphate ion is-

    Solutions

  • Question 3/5
    1 / -0

    N2(g) + 3H2 (g)  2NH3(g) ; Haber's process, Mo is used as -

    Solutions

    MO is catalytic promoter & it improves catalytic properties as catalyst

  • Question 4/5
    1 / -0

    Iron becomes passive by..................due to formation of ................

    Solutions

    Fe + HNO3 → Fe2O3 + NO2 + H2O    
    80%

  • Question 5/5
    1 / -0

    Bayer's reagent used to detect olifinic double bond is-

    Solutions

    Cold dilute alkaline KMnO4 is Bayer’s neagent.

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