Which of the following minerals of aluminum does not contain oxygen?

Which one of the following is the mineral for tin?

Metals are usually not found as nitrates in their ores. Out of the following two ($I$ and $II$) reasons,which is/are true for the above observation?
$I.$ Metal nitrates are highly unstable.
$II.$ Metal nitrates are highly soluble in water.

Identify the correct pair of minerals and their formulas from the following.

Which of the following is not an ore?

The most important ore of tin is