Properties of Compounds of Phosphorus

What is the colour of phosphorus pentachloride.

What is the odour of phosphorous trichloride ?

How many covalent bonded units are present in the phosphorous trichloride ?

What is the structure of phosphorus trichloride ?

What is the colour of phosphorous trichloride ?

Which of the following gas has rotten fish smell ?

What is the colour of phosphine?

What is the colour of Phosphorus pentachloride powder ?

Which is correct for ${\mathrm{H}}_3{\mathrm{PO}}_3:$

Aqueous solution of ${\mathrm{PH}}_3$ in presence of $\mathrm{UV}$ radiations gives:

The compound which has ionic nature in solid state is:

The true statement for the acids of phosphorus, ${\mathrm{H}}_3{\mathrm{PO}}_2,{\mathrm{H}}_3{\mathrm{PO}}_3$ and ${\mathrm{H}}_3{\mathrm{PO}}_4$ is:

The following question consists of two statements one labelled $\mathrm{ASSERTION} \left(\mathrm{A}\right)$ and the another labelled $\mathrm{REASON} \left(\mathrm{R}\right)$. Select the correct answer to the question from the codes given below:

$\mathrm{Assertion}:$ ${\mathrm{PCl}}_3$ fumes, when it is exposed in moist air.

$\mathrm{Reason}:$ ${\mathrm{PCl}}_3$ is hydrolysed in presence of moisture giving fumes of $\mathrm{HCl}$.

Which of the following statement is incorrect for phosphine?

The solution of phosphine in water decomposes in presence of light to give:

Among the following, which is the reducing acid? 

Among the following, the most stable anion is:

Which one is correct regarding thermal stability of hydrides of group $15$?

Which of the following oxoacids acts as best reducing agent?

For ${\mathrm{H}}_3\mathrm{P}{\mathrm{O}}_3$ and ${\mathrm{H}}_3\mathrm{P}{\mathrm{O}}_4$ correct choice is