Question 29
Question 29 of 40
Question image for Q29
Periodic Table
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No letter options?
Older MCQs might not have the typical A, B, C, D choices. They have choices 1, 2, 3, and a combination of them is the answer. Below is the key that maps such combinations to the answer.
A 1, 2 and 3 are correct
B 1 and 2 only are correct
C 2 and 3 only are correct
D 1 only is correct
Topics Tested
21. Organic synthesis
21.1. Organic synthesis

analyse a given synthetic route in terms of type of reaction and reagents used for each step of it, and possible by-products

15. Halogen compounds
15.1. Halogenoalkanes

describe the elimination reaction with NaOH in ethanol and heat to produce an alkene as exemplified by bromoethane

14. Hydrocarbons
14.2. Alkenes

recall the reactions (including reagents and conditions) by which alkenes can be produced: (a) elimination of HX from a halogenoalkane by ethanolic NaOH and heat (b) dehydration of an alcohol, by using a heated catalyst (e.g. \( Al_2O_3 \)) or a concentrated acid (e.g. concentrated \( H_2SO_4 \)) (c) cracking of a longer chain alkane