Diamond and emerald are forms of which of the following respectively?

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 of the following oxides is amphoteric?

Hydrolysis of which of the following carbides does not take place?

In the following reaction,assign the state for the underlined atom for the product of complete hydrolysis at $R.T.$:
$\underline{N}O + H_2O \longrightarrow$ No reaction

Which of the following statements about zeolites is incorrect?