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S3T16:
Which of the following is the product formed when RCX₃ is refluxed with NaOH(aq)?
Final Results
3%
A. RCHO
33%
B. RCOO⁻
38%
C. RCOOH
26%
D. RC(OH)₃
S3T16:
The energy profile diagram for the alkaline hydrolysis of haloalkane X under reflux shows that a reactive intermediate is formed during the reaction mechanism. Which of the following compounds best fits the description?
Final Results
11%
A. C₆H₅Br
33%
B. CH₃CH₂(CH₃)CHCl
26%
C. H₃C-C₆H₄-CH₂Cl
30%
D. CH₃CH₂(CH₃)₂CBr
S3T16:
Haloalkane P undergoes alkaline hydrolysis through the formation of an activated complex. Which of the following statements is true?
Final Results
15%
A. The activated complex is a reactive intermediate.
24%
B. The rate equation is given by rate = k[RX].
11%
C. P is a type of tertiary haloalkane.
50%
D. This is a second order reaction.
S3T16/19:
CH₃CH₂COOH is produced when compound S reacts with aqueous sodium hydroxide under reflux, followed by acidification. What is compound S?
Final Results
31%
A. CH₃CH₂CH₂OH
22%
B. CH₃CHBrCHBr₂
18%
C. CH₃CH(OH)CH₃
29%
D. CH₃CH₂CBr₃
S3T16:
Name the reaction and clearly state the type of reaction.


Note:
Please observe this mechanism carefully, especially the activated complex (transition state), and make sure to draw it accordingly during the exam. Remember to place the negative charge above the double dagger (‡) symbol.
🤩2
S1T16/17:
2-bromobutane is refluxed with ethanolic KOH to form compound X. What is the organic product formed when X is heated with KMnO₄, H⁺?
Final Results
32%
A. CH₃COOH
17%
B. CH₃CH₂COOH
34%
C. CH₃COCH₂CH₃
17%
D. CH₃CH₂CH₂COOH
2
S3T16:
What is the product formed when bromoethane reacts with ethanolic KCN, followed by acidic hydrolysis?
Final Results
7%
A. CH₃COOK
17%
B. CH₃COOH
46%
C. CH₃CH₂COOH
29%
D. CH₃CH₂CH₂NH₂
S3T15:
The reaction between CH₃CH=CH₂ and HBr in the presence of ROOR is a type of nucleophilic substitution.
Final Results
44%
A. True
56%
B. False
S3T15:
The reaction between propene and HBr in the presence of ROOR is an electrophilic addition reaction.
Final Results
68%
A. True
32%
B. False
👍1
S1T16:
What is the systematic name of the compound with the formula C₆H₅CH₂Cl?
Final Results
16%
A. Benzyl chloride
22%
B. Phenylmethyl chloride
18%
C. Chlorophenylmethane
44%
D. (Chloromethyl)benzene
S3T15:
Which of the following is the organic product formed when benzene reacts with ethene in the presence of AlCl₃ and HCl at 250 °C and 40 atm, followed by oxidation with hot KMnO₄, H⁺?
Final Results
39%
A. C₆H₅COOH
16%
B. C₆H₅CH₂CH₃
38%
C. C₆H₅CH₂COOH
8%
D. C₆H₅COCH₂CH₃
S1T3:
What is the total number of sp³ hybridised atoms in the compound with the formula C₆H₅COOH?
Final Results
16%
A. 0
24%
B. 1
35%
C. 2
25%
D. 7
S1T7:
Which of the following halide ions produces no observable change when aqueous silver nitrate is added to it?
Final Results
6%
A. Bromide ion
24%
B. Chloride ion
46%
C. Fluoride ion
24%
D. Iodide ion
3
S1T5:
Which of the following is the most reactive alkaline earth metal?
Final Results
40%
A. Ba
26%
B. Be
13%
C. Ca
20%
D. Sr
2
S1T5:
Which of the following Group 2 elements does not need to be kept under paraffin oil?
Final Results
9%
A. Sr
18%
B. Ca
57%
C. Be
16%
D. Ba
1
S1T4:
Which of the following is the product formed (other than water) when phosphorous acid reacts with excess aqueous sodium hydroxide?
Final Results
18%
A. Na₃PO₃
47%
B. Na₃PO₄
20%
C. Na₂HPO₃
15%
D. NaH₂PO₃
S1T4:
What is the oxidation state of the Period 3 element in H₃PO₄?
Final Results
11%
A. 0
11%
B. -3
20%
C. +3
58%
D. +5
2025/10/20 01:26:38
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