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The softness of group IA metals increase...

The softness of group `IA` metals increase down the group with increasing atomic number.

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The correct Answer is:
T
True. The softness of group `IA` metals (alkali metals) increases down the group with increasing atomic number. This is a true statement.
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Statement-1: Metallic character of first group metals increases down the group with the decreasing ionisation energy. Statement-2: The loss and gain of electron(s) can be used in explaining the reducing and oxidising behaviour of the element respectively.

Explain the following: a. Despite the fact that Li^(o+) has the smallest size among alkali metals, it moves through a solution less rapidly than the others. b. LiF has the lowest solubility among group 1 metal haldes. c. The softness of alkali metals increases with the increases in atomic number.

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Assertion : Solubilities of alkali metal fluorides and carbonates increase down the group. Reason : Hydration energies of alkali metal halides decrease down the group with increase in size of cations.

Knowledge Check

  • Statement-1: Metallic character of first group metals increases down the group with the decreasing ionisation energy. Statement-2: The loss and gain of electron(s) can be used in explaining the reducing and oxidising behaviour of the element respectively.

    A
    Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement-15
    B
    Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-15
    C
    Statement-1 is True, Statement-2 is False
    D
    Statement-1 is False, Statement-2 is True

  • Which of the following properties of the elements of group II (alkali earth metals) increase (s) with increasing atomic number?

    A
    Stability of carbonate
    B
    Solubility of hydroxide
    C
    Reactively with water
    D
    First ionization energy

  • Which of the following properties of the elements of group II (alkali earth metals) increase (s) with increasing atomic number?

    A
    Stability of carbonate
    B
    Solubility of hydroxide
    C
    Reactively with water
    D
    First ionization energy