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d and f-Block Elements Test - 19

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d and f-Block Elements Test - 19
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  • Question 1
    1 / -0

    Which among the following is not considered as a part of transition elements?

    Solution

    A transition metal is one that forms one or more stable ions which have incompletely filled d orbitals. On the basis of this definition, scandium and zinc do not count as transition metals - even though they are members of the d block.

  • Question 2
    1 / -0

    Which among the following transition metal has lowest melting point?

    Solution

    Zn has lowest melting point because it doesnot have any unpaired electrons.

  • Question 3
    1 / -0

    Transition metals with highest melting point is

    Solution

    W belongs to 5d series and also it have lot of unpaired electrons thus it forms strong metallic bonding.

  • Question 4
    1 / -0

    Transition metals with lowest melting point is

    Solution

    Zinc (Zn) has the lowest melting point in 3d series because of the absence of d-electrons.

  • Question 5
    1 / -0

    Which is the most stable oxidation state of iron?

    Solution

    Fe has d5 configuration in +3 oxidation state.

  • Question 6
    1 / -0

    Electronic configuration of Cu3+ is

    Solution

    Cu has atomic number 29.

  • Question 7
    1 / -0

    Maximum magnetic moment is shown by

    Solution

    Magnetic moment is maximum for the element having maximum unpaired electrons.

  • Question 8
    1 / -0

    Maximum oxidation state is shown by

    Solution

    Os shows maximum oxidation state of +8.

  • Question 9
    1 / -0

    Which one of the following compound is deliquescent?

    Solution

    ZnCl2 is deliquescent.

  • Question 10
    1 / -0

    Which of the following ion has smallest radii?

    Solution

    In period when we move from left to right in a period atomic radii 1st decreases till nickel then starts increasing so Ni2+ has smallest radii.

  • Question 11
    1 / -0

    Which of the following pairs of ions have same paramagnetic moment?

    Solution

    Cu2+, Ti3+ will have same unpaired electrons and hence same paramagnetic moment.

  • Question 12
    1 / -0

    Mohr’s salt is a

    Solution

    Mohr salt is an example of double salt. Mohr Salt is 

    FeSO4 . (NH4)2 SO4.6H2O

  • Question 13
    1 / -0

    Red hot steel rods on suddenly immersing in water become

    Solution

    Red hot steel rods on suddenly immersing in water become hard and brittle.

  • Question 14
    1 / -0

    Which of the following methods is based on distribution law?

    Solution

    Parkes process is a process for removing silver from Pb. It is an example of Liquid liquid extractions

  • Question 15
    1 / -0

    Which is called chromic acid?

    Solution

    Chromic Acid is a naturally occurring oxide with a formula H2CrO4.

  • Question 16
    1 / -0

    Which one of the following combines with Fe2+ ion to form a brown complex?

    Solution

    [Fe(H2O)5NO]2+is brown color complex.

  • Question 17
    1 / -0

    Lucas reagent is

    Solution

    Lucas Test is done to distinguish primary secondary and tertiary alcohols. Lucas reagent is ZnCl2 + HC

  • Question 18
    1 / -0

    Vitamin B12 contains?

    Solution

    Vitamin B12 contains Co3+.

  • Question 19
    1 / -0

    Which is least soluble in water?

    Solution

    Ag2S is least soluble in water.

  • Question 20
    1 / -0

    A reduction in the atomic size with increase in atomic number is characteristic of the elements of

    Solution

    In f block elements with increase in atomic number atomic radii decreases smoothly.

  • Question 21
    1 / -0

    Nitrous oxide is evolved when Zn is treated with

    Solution

    4Zn + 10HNO3 → 4Zn(NO3)2 + N2O + 5H2O

  • Question 22
    1 / -0

    Ferrous sulphate on heating gives

    Solution

    FeSO4 on heating gives SO2 and SO3

  • Question 23
    1 / -0

    In the reaction, SnCl2 + HgCl2 → A + SnCl4

    Solution

    SnCl2 + HgCl2 → Hg + SnCl4

  • Question 24
    1 / -0

    Ag+ ion is isoelectronic with

    Solution

    Ag+ is isoelectronic with Cd2+

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