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10. The s -block Elements
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Q23 of 53 Page 128

In the following question two or more options may be correct.

Several sodium compounds find use in industries. Which of the following compounds are used for textile industry?


NaOH is used in textile industries as a mercerising agent for cotton fabrics, Na2CO3 is also used in textiles and as water softening, laundering and cleaning agents.

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21

Dehydration of hydrates of halides of calcium, barium and strontium i.e., CaCl26H2O, BaCl2 .2H2 O, SrCl2.2H2O, can be achieved by heating. These become wet on keeping in air. Which of the following statements is correct about these halides?

22

In the following question two or more options may be correct.

Metallic elements are described by their standard electrode potential, fusion enthalpy, atomic size, etc. The alkali metals are characterised by which of the following properties?


24

In the following question two or more options may be correct.

Which of the following compounds are readily soluble in water?


25

In the following question two or more options may be correct.

When Zeolite, which is hydrated sodium aluminium silicate is treated with hard water, the sodium ions are exchanged with which of the following ion(s)?


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10. The s -block Elements
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