Deep sea divers use a mixture of ....... for respiration.

Assertion : $PbI_4$ is a stable compound.
Reason : Iodide stabilizes higher oxidation state.

Assertion : $Pb^{4+}$ compounds are stronger oxidizing agents than $Sn^{4+}$ compounds.
Reason : The higher oxidation states for the group $14$ elements are more stable for the heavier members of the group due to 'inert pair effect'.

Which one of the following phosphorus halides contains both tetrahedral and octahedral shaped ions in its solid state?

The gas that cannot be collected over water is:

Which of the following statements are correct?
$(i)$ $CCl_4$ undergoes hydrolysis easily
$(ii)$ Diamond has directional covalent bonds
$(iii)$ Fullerene is the thermodynamically most stable allotrope of carbon
$(iv)$ Glass is a man-made silicate
The correct answer is