Part 1-: Which of the following is/are types of chemical weathering? a) sheeting
ID: 109729 • Letter: P
Question
Part 1-:
Which of the following is/are types of chemical weathering?
a) sheeting
b) carbonation
c) reduction
d) exfoliation
e) both b and c are both correct.
Part 2-:
Carbon dioxide reacts with water to form ____________, which can react with silicate minerals to produce __________ and ___________. :
a) calcium carbonate, carbon, calcium ions
b) carbonic acid, carbon, hydrogen ions
c) calcium carbonate, bicarbonate ions, hydrogen ions
d) carbonic acid, bicarbonate ions, calcium ions
e) bicarbonate ions, calcium ions, carbonic acid
Explanation / Answer
1) Which of the following is/are types of chemical weathering?
a) sheeting
b) carbonation
c) reduction
d) exfoliation
e) both b and c are both correct.
Answer is E
The common chemical weathering processes are hydrolysis, oxidation, reduction, hydration, carbonation, solution.
Carbonation is mixing of water with carbon dioxide to make carbonic acid. This is important process in the formation of caves.
Hydrolysis occurs when the two surfaces of water and compound meet
2) Carbon dioxide reacts with water to form ____________, which can react with silicate minerals to produce __________ and ___________. :
a) calcium carbonate, carbon, calcium ions
b) carbonic acid, carbon, hydrogen ions
c) calcium carbonate, bicarbonate ions, hydrogen ions
d) carbonic acid, bicarbonate ions, calcium ions
e) bicarbonate ions, calcium ions, carbonic acid
Answer is D
CO2 + H2O -> H2CO3 (carbonic acid)
Carbonic acid used to weather rocks and yield bicarbonate ions and clays
H2CO3 + H2O + silicate minerals -> HCO3- + cations (Ca++, Fe++, Na+, etc.) + clays