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प्रश्न
Why is the Ionisation enthalpy of hydrogen higher than that of sodium?
उत्तर
In sodium the last shell electron is in 3s1 after losing that electron, it can acquire the configuration of Ne. Whereas in hydrogen, the electron is in s-orbital.
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संबंधित प्रश्न
how can demineralised be obtained?
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Hardness of water may be temporary or permanent. Permanent hardness is due to the presence of:
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\[\ce{PbS (s) + H2O2 (aq) ->}\]
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Match the items in Column I with the relevant item in Column II.
| Column I | Column II |
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| (ii) Used in Calgon method | (b) perhydrol |
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| (d) propellant |
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Reason (R): Washing soda reacts with soluble magnesium and calcium sulphate to form insoluble carbonates.
