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S(2) : Plaster of paris is a hemihydrate...

`S_(2) :` Plaster of paris is a hemihydrate of calcium sulphate obtained by heating the gypsum above `393K`.
`S_(2) :` Sodium carbonate is used in water softening.
`S_(4) :` The order of mobilities of the alkali metal ions in aqueous solutions is `Li^(+)gtNa^(+)gtK^(+)gtRb^(+)gtCs^(+)`

A

` T T F`

B

`T T T `

C

`F T F`

D

`F F F`

Text Solution

Verified by Experts

The correct Answer is:
3
`S_(1):(2CaSO_(4).2H_(2)O)overset(393K)rarr2(CaSO_(4)).H_(2)O+3H_(2)O,` above `393K` dead burnt plaster is obtained.
`S_(2):Ca^(2+)+Na_(2)CO_(3)rarrCaCO_(3)darr+2Na^(+)`
`S_(3):Li^(+) lt Na^(+) lt K^(+) lt Kb^(+) lt Cs^(+)`
Bigger hydrated ion moves slower in aqueous solution.
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Knowledge Check

  • Consider the following statements , S_(1) :Gypsum contains a lower percentage of calcium than plaster of pair S_(2) : Plaster of paris can be re-obtained by hydration of dead plaster S_(3) : Gypsum loses (3)/(2) of its water of crystallisation forming plaster of paris at 120^(@)C S_(4) : Plaster of paris can be obtained by partial oxidation of gypsum. and arrange in the order of true/false.

    A
    TFTF
    B
    FFTF
    C
    TTFF
    D
    TTTT

  • Consider the following statements: S_(1) : Among alkali metal halides lithium iodide is the most covalent in nature. S_(2) : Potassium has greater photoelectric work function than sodium. S_(3) : The blue solution osf alkali metals in liquid ammonia is stable at room temperature, where ammonis is still a liquid, in the presence of Fe. S_(4) : The melting and boilling points of alkali metal halides always follow the trend : chloride gt flouridegtbromidegtiodide. and arrange in the order of true/iodide.

    A
    T F F F
    B
    T T F F
    C
    T F T T
    D
    T T T F

  • 0.1 M aqueous solution of HClO_4, ZnCl_2 and K_2S are taken , then increasing order of pH of solutions will be :

    A
    `K_2S lt ZnCl_2 lt HClO_4`
    B
    `K_2S lt HClO_4 lt ZnCl_2`
    C
    `HClO_4 lt ZnCl_2 lt K_2S`
    D
    `HClO_4 lt K_2S lt ZnCl_2 `
    • RESONANCE-S BLOCK ELEMENTS-INORGANIC CHEMISTRY(s-Block Elements)
    1. S(2) : Plaster of paris is a hemihydrate of calcium sulphate obtained ...

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    2. Which of the following statements is true for all the alkali metals ?

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    3. Which of the following statements is incorrect ?

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    4. Which of the following statements is not ture about the dilute solutio...

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    5. Which of the following gives propyne on hydrolysis ?

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    6. Alkaline earth metal nitrates on heating decompose to give :

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    7. Which of the following statement is incorrect ?

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    8. KO(2) ( potassium super oxide ) is used in space and submarines becaus...

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    9. Select the incorrect option :

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    10. Sodium and potassium react with water much more vigorously than lithiu...

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    11. Identify the correct statement.

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    12. Which of the following does not participate in the solvay's process f...

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    13. In the manufacture of metallic sodium by the fused salt electrolysis (...

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    14. Gypsum CaSO(4).2H(2)O on heating about 120^(@)C forms a compound whic...

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    15. A solid compound 'X' on heating gives CO(2) gas and a residue. The res...

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    16. The process of industrial manufacturing of sodium carbonate is known a...

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    17. A substance X is a compound of s- block element, substance X give a v...

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    18. On combustion in excess of air sodium mainly forms :

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    19. Following information are known abot a metal M : I. A salt of metal...

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    20. Consider the following statements and pick out the wrong one. (1) T...

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