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Can somebody please explain the following questions?
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_w11_qp_12.pdf
Question 13 ans C.
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s12_qp_12.pdf
Question 14 ans B.
w11qp12
Q13.
C burning in excess O2 forms CO2
S burning in excess O2 forms SO2, some amounts of SO3 might be formed, but would be a minor product compared to SO2.
H burning in excess O2 forms H2O
s12q12
Q14
CaCO3--> CaO + CO2 (Thermal decomposition, takes in energy, endothermic)
CaO + H2O --> Ca(OH)2 (hydration of lime, exothermic)