The halogen having five vacant orbitals in the outermost shell belongs to

Correct Answer - C Aryl halides cannot be prepared by replacing hydroxyl group of phenols because the carbon oxygen bond in phenols has a partial double bond character and is difficult...

Correct Answer - A `0.20` g oxygen `equiv 3.17` g halogen `therefore` Equivalent mass of halogen `equiv (3.17)/0.20 xx 8 = 126.8` g `~=127` g

Correct Answer - B The oxoacid of chlorine atom has tripositie oxidation state of Cl. e.g., `HClO_(2),`Cl in +3oxidation state.

Correct Answer - D Outermost electronic configuration of group 16 element is `ns^2` `np^4`.

Correct Answer - D Bond length increases down the group from `F_2` to `I_2`

Correct Answer - B Solubility of iodine in water increases by the addition of KI due to the formation of `KI_3`

Correct Answer - B Halogens have seven electrons in their valence shell so these have valence shell electronic configuration of `ns^2 np^5`

Correct Answer - D Down the group, non-metallic character decreases. Iodine shows slight metallic character in compounds like ICl and `I Cl_3`.

Correct Answer - C Valency of A is 3 and that of X is (8-6), i.e.2

Correct Answer - C Configuration of `Cl^-` ion is `1s^2 2s^2 2p^6 3s^2 3p`