Chemistry - Thermochemistry Question with Solution | TestHub
Match Column I with Column II
Column I | Column II |
|---|---|
P) C(s) + 1/2 O2(g) → CO(g) | i) Combustion |
Q) CO(g) + 1/2 O2(g) → CO2(g) | ii) Neutralization |
R) NaOH(aq) + HCl(aq) → NaCl(aq) + H2O(l) | iii) Process of formation |
S) H2(g) + 1/2 O2(g) → H2O(l) | iv) Used in fuel cell |
(Column I = Reaction; Column II = Process)
Options:
Answer:
Solution:
The reaction C(s) + 1/2O2(g) tarrow CO(g) represents the formation of 1 mol of CO from its elements. This is not a combustion reaction, as combustion requires complete oxidation to CO2. Therefore, this corresponds to P-iii.
The reaction CO(g) + 1/2O2(g) tarrow CO2(g) is the complete combustion of CO. Thus, this matches Q-i.
The reaction NaOH + HCl tarrow NaCl + H2O is a neutralization reaction between a strong acid and a strong base. This corresponds to R-ii.
The reaction H2(g) + 1/2O2(g) tarrow H2O(l) represents the combustion of hydrogen, the standard formation reaction of H2O(l), and the overall reaction of the H2-O2 fuel cell. Therefore, this matches S-i, iii, iv.
Final Answer: P-iii; Q-i; R-ii; S-i, iii, iv.
