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d and f Block Test - 3

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d and f Block Test - 3
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Weekly Quiz Competition
  • Question 1
    1 / -0.25

    Only One Option Correct Type

    Direction (Q. Nos. 1-10) This section contains 10 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.

    Q. 

    Atomic number of second transition series lies from

    Solution

    Since,1st transition series belongs to 3d orbital and 2nd transition series belongs to 4d-orbital. According to the given option, atomic number 39 to 48 (5s2 4d1-10 ) belongs to second transition series.

  • Question 2
    1 / -0.25

    Which has lower standard reduction potential (SRP) value?

    Solution

    Mn2+ / Mn have - 1.18SRPvalue.

  • Question 3
    1 / -0.25

    An element has configuration 4d5 5s2 . The element belongs to

    Solution

    Ford-block elements, group number is equal to the number of electrons in (n - 1)d subshell + number of electrons in valence shell (nth shell).

  • Question 4
    1 / -0.25

    The electronic configuration of palladium is

    Solution

    [Kr]4d10 5s0

  • Question 5
    1 / -0.25

    Which has lowest and highest first ionisation enthalpy in 3d series?

    Solution

    Sc (3d1   4s2 )has 631 kJ mol-1 and Zn (3d10 4s2 ) has 906 kJ  mol-1  

  • Question 6
    1 / -0.25

    The electronic configuration of the element which is just above the element with atomic number 42 in the same group

    Solution

    The element lying above Z = 42 has Z value 24, i.e. chromium. Hence, Cr configuration is [Ar]3d5 4s1

  • Question 7
    1 / -0.25

    Which one of the following exists in the oxidation state other than +3?

    Solution

    The correct answer is option C

    Ce exist in the oxidation state other than +3 .

     

    (a) B - Boron has +1 and +3 oxidation state.

    (b) Al - Aluminium has +1,+2 and +3 oxidation state.

    (c) Ce - Cerium has +3 and +4 oxidation state.

    (d) Ga - Gallium has +1 and +3 oxidation state.

    Cerium (Ce) have [Xe] 4f ²6s ²electronic configuration.

  • Question 8
    1 / -0.25

    Electronic configuration of a transition element X in +3 oxidation state is [Ar] 3d5 and Y in +2 state is [Ar] 3d8 . What are the atom ic numbers of the elements?

    Solution

    Fe (Z = 26) in + 3 oxidation state show Fe3+ ([Ar] 3d5 ) configuration. Ni(28) in +2 oxidation state show Ni2+ ([Ar]3d8 ) configuration.

  • Question 9
    1 / -0.25

    The atomic radii of Cu and Ag are 1.17 Åand 1.34 Å. The atomic radius of gold is expected to be

    Solution

    Due to lanthanide contraction, Ag and Au have nearly same size.

  • Question 10
    1 / -0.25

    A red solid is insoluble in water. However, it becomes soluble if some KI is added to water. Heating the red solid in a test tube results in liberation of some violet coloured fumes and droplets of a metal appear on the cooler parts of the test tube. The red solid is   

    Solution

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