The element that does not form acidic oxide is _____.

 

Which is the most basic oxide?

Which of the following is different from the other three?

Which one of the following is a neutral oxide?

Identify the element that forms amphoteric oxide?

In the following reactions, $\mathrm{ZnO}$ is, respectively, acting as a/an______.

$\mathrm{i}.$ ${\text{ZnO + Na}}_{\text{2}}{\text{O →Na}}_2{\text{(Zn(OH)}}_4\text{)}$

$\mathrm{ii}.$ ${\text{ZnO + CO}}_{\text{2}}{\text{→ZnCO}}_{\text{3}}$

The colour of liquid ${\text{O}}_{\text{2}}$ is _____.

Ozone is present as a chief constituent in which region of the atmosphere?