Import Question JSON

$\text{HINT: Down the group 15th group element toxic nature increases.}$ $\text{Explanation:}$ $\text{Ammonia is highly toxic. Normally blood ammonium concentration is < 50 μmol/L, and an increase to only 100 μmol/L can lead to disturbance of consciousness. A blood ammonium concentration of 200 μmol/L is associated with coma and convulsions.}$ $\text{As the concentration of ammonium rises, so the reaction proceeds in the direction of formation of glutamate from ketoglutarate.}$ $\text{The diagram shows the biochemical pathway: α-ketoglutarate + } \text{NH}_4^+ \rightarrow \text{glutamate + } \text{NH}_4^+ \rightarrow \text{glutamine}$ $\text{The elements above and below phosphorus in the periodic table are nitrogen (N) and arsenic (As), which also produce toxic hydrides, namely, } \text{NH}_3 \text{ and } \text{AsH}_3 \text{.}$ $\text{Down the group element toxic nature increases. Arsenic is more toxic than nitrogen. Hence, } \text{NH}_3 \text{ is the least poisonous.}$