PDF chapter test TRY NOW

I.
Assertion (A)When iron is exposed to air for an extended period of time, it forms a rusty coating.
Reason (R)This is due to iron's reactivity with dry air.
 
II.
Bottles A, B, and C contain water + air, water and dry air, respectively. You keep the key in each bottle. An iron key is kept in each bottle. What will happen if you wait a while?