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Q1. Which of the following has significant effect on the properties of p-block elements in their absence and presence respectively? (a) d-orbitals in second period and d or d and f-orbitals in heavier elements (b) d and/or f-orbitals in heavier clements and d-orbitals in second period (c) d-orbitals in second period and f-orbitals in heavier elements (d) f-orbitals in heavier elements and d-orbitals in second period​

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