1. Tardigrade
  2. Question
  3. Chemistry
  4. Read the following statements regarding chemical reactivity of group 15 elements. (i) Only compound of Bi with +5 oxidation state is BiF5. (ii) Intermediate oxidation states for both nitrogen and phosphorus disproportionate in both acid and alkali. (iii) Nitrogen due to absence of d-orbitals in its valence shell cannot form dπ-p π bond as the heavier elements thus R3P = O exists but R3N = O does not exists. (iv) BiH3 is the strongest reducing agent amongst the hydrides of nitrogen family. (v) P2O3 is more acidic than P2O5 Which of the following is the correct code for the statements above?

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Q. Read the following statements regarding chemical reactivity of group $15$ elements.
(i) Only compound of Bi with $+5$ oxidation state is $BiF_{5}$.
(ii) Intermediate oxidation states for both nitrogen and phosphorus disproportionate in both acid and alkali.
(iii) Nitrogen due to absence of d-orbitals in its valence shell cannot form $d\pi-p \pi$ bond as the heavier elements thus $R_{3}P = O$ exists but $R_{3}N = O$ does not exists.
(iv) $BiH_{3}$ is the strongest reducing agent amongst the hydrides of nitrogen family.
(v) $P_{2}O_{3}$ is more acidic than $P_{2}O_{5}$
Which of the following is the correct code for the statements above?

The p-Block Elements - Part2

Solution:

For nitrogen oxidation states from $+1$ to $+4$ disproportionate in acidic solution only. Oxidation state of phosphorous in $P _{2} O _{5}$ is $+5$ whereas in $P _{2} O _{5}$ is $+3$ thus $P _{2} O _{5}$ is more acidic than $P _{2} O _{3}$.