On heating ammonium dichromate,the gas evolved is

What may be expected to happen when phosphine gas is mixed with chlorine gas?

The most stable trihalide of nitrogen is ..... .

Which of the following statements about phosphine $(PH_3)$ is/are correct?
$(a)$ It has a rotten egg-like smell.
$(b)$ In aqueous solution and in the presence of light,it yields red phosphorus and hydrogen.
$(c)$ It explodes with $Br_2$.
$(d)$ In its pure form,it is non-inflammable.

Phosphine may be produced by adding water to

Which of the following statements is incorrect?