Question 1.
Chemical reactions within a volcanic cloud can create an environmental hazard that causes soil to be depleted of nutrients so that plants die.
What do we call this hazard?

Answer:
Acid Rain

Explanation:
Acids resulting from chemical reactions within the volcanic cloud are carried to Earth by rain or snow. If the pH is below 5 (the lower the pH the more acidic) the precipitation is called acid rain. The acid seeps into the ground or into rivers, lakes or ponds and changes the chemistry of the soil or the water. This can cause vital minerals in the soil to be changed so that they can no longer be used as nutrients by plants.

Question2.
Which three of the following will not be found in a volcanic cloud that has travelled several hundred miles from its point of origin:
Silicate dust, sulfur dioxide (SO₂), hydrogen sulfate (H₂SO₄), hydrogen sulfide (H₂S), superheated steam, carbon dioxide (CO₂), carbon monoxide (CO),

Answer:
Hydrogen sulfide (H₂S), superheated steam, carbon monoxide (CO),

Explanation;
The hydrogen sulfide will have incorporated oxygen atoms from the atmosphere to become hydrogen sulfate.
The carbon monoxide will similarly have become carbon dioxide.
The superheated steam will have cooled down and will be present as water vapor or water droplets.