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ICSE Class 10 Chemistry 2019 Paper

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Arrange the following according to the instructions given in brackets:
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Question : 36 of 86
Marks: +1, -0
Li,K,Na,H\mathrm{Li}, \mathrm{K}, \mathrm{Na}, \mathrm{H}
(In the decreasing order of their ionization potential)
Solution:  
  H>Li>Na>K.\; \mathrm{H} > \mathrm{Li} > \mathrm{Na} > \mathrm{K} .
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