Question
Why does benzene undergo substitution more readily than addition?
A. Benzene is unsaturated.
B. Addition could produce an alkane.
C. Resonance makes carbon–carbon bonds too strong to break.
D. A benzene molecule is planar.
▶️Answer/Explanation
Markscheme: C
A. \(1.0 \times 10^{-22}\)
B. \(2.0 \times 10^{-23}\) g
C. \(8.3 \times 10^{-24}\) g
D. \(1.2 \times 10^{-21}\) g
▶️Answer/Explanation
Markscheme: D
Question
20\(cm^3\) of gas A reacts with 20\(cm^3\) of gas B to produce 10\(cm^3\) of gas \(A_xB_y\) and 10\(cm_3\) of excess gas A. Correct values for subscripts x and y in the empirical formula of the product \(A_xB_y\) (g)?
▶️Answer/Explanation
Markscheme: D
Question
Which graph represents the relationship between the amount of gas, $\mathrm{n}$, and the absolute temperature, $\mathrm{T}$, with all other variables in the ideal gas equation, $P V=n R T$, held constant?
Answer/Explanation
Solution:B