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Classification ...

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  • Question 1
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    Which statements about Group I and Group VII elements are correct?
    1. In Group I, lithium is more reactive than potassium.
    2. In Group VII, chlorine is more reactive than fluorine.

  • Question 2
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    In the modern periodic table, elements are arranged in order of increasing atomic number which is related to the electronic configuration. Depending upon the type of orbitals receiving the last electron, the elements in the periodic table have been divided into four blocks, viz s, p, d and f. The modern periodic table consists of 7 periods and 18 groups. Each period begins with the filling of a new energy shell. In accordance with the Aufbau principle filling of a new energy shell. In accordance with the Aufbau principle, the seven period (1 to 7) have 2,8,8,18,18,32 and 32 elements respectively. The seventh period is still incomplete. To avoid the periodic table being too long, the two series of f - block elements, called lanthanoids and actinoids are placed at the bottom of the main body of the periodic table..
    The electronic configuration of the elements which is just above the elements with atomic number 43 in the same group is ____

  • Question 3
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    Statement I: In ClF3ClF_{3}, chlorine has the oxidation number - 1.

    Statement II: Electron affinity of chorine is greater than that of fluorine.

  • Question 4
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    The electronic structure of zinc (Z=30)(Z=30) is 2,8,18,2.2,8,18,2. The electronic structure of gallium (Z=31)(Z=31) will be

  • Question 5
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    Correct option for electron affinity of : 

  • Question 6
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    Which of the following electronic configuration represents most electropositive element?

  • Question 7
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    Which of the following statements is incorrect? 

  • Question 8
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    The most predominantly electrovalent compounds will be obtained from the combination of elements belonging to:

  • Question 9
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    Which of the following elements has the maximum electron gain enthalpy?

  • Question 10
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    Diagonal relationship in periodic table is shown by elements of _____ and _____ periods: 

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