a. Select the member `s` of group `14` that (i) forms the most acidic iodide (ii) is commonly found in `+2` oxidation state and (iii) used as semiconductor . (Solved NCERT Problem `11.5`) b. `|SiF_5^(2-) ` is known, whereas `|SiCl_5|^(2-)` not. Glve possible preasons . (Solved NCEGT Pronlem `11.6`) c . Diamond is covalent , yet covelnt , yet it has high melting point . Why ? (Solved NCEGT Pronlem `11.7`) .

a. Select the member `s` of group `14` that (i) forms the most acidic

1.	a. Select the member `s` of group `14` that (i) forms the most acidic iodide (ii) is commonly found in `+2` oxidation state and (iii) used as semiconductor . (Solved NCERT Problem `11.5`) b. `\|SiF_5^(2-) ` is known, whereas `\|SiCl_5\|^(2-)` not. Glve possible preasons . (Solved NCEGT Pronlem `11.6`) c . Diamond is covalent , yet covelnt , yet it has high melting point . Why ? (Solved NCEGT Pronlem `11.7`) .
Answer» (i) carbon (ii) lead (iii) silicon and germanium

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