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Chemistry - Periodic Classification Of Elements

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11. There are ___ periods in the Modern Periodic Table. (NTSE Mizoram, Stage-I, 2012-13)

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12. Element "X" which is solid and having high melting point, form a chloride "XCI3". This element "X" would be in a group of the Modern Periodic Table with (NTSE Rajasthan, Stage-I, 2012-13)

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13. Which one among the following is not a periodic property? (NTSE West Bengal, Stage-I, 2013-14)

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14. Which of the following element has highest electron-gain enthalpy? (NTSE Odisha, Stage-I, 2013-14)

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15. The order of increasing acidic nature of S02 ,Si02,
P2 O3 and AI2O3 is

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Periodic Classification Of Elements