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WorksheetsUJIAN PENILAIAN SUMATIF 2 (DK024)- TRIAL
Total questions: 20
Worksheet time: 40mins
The correct IUPAC name for this compound is
trans-2,3,4-terimethyl-3-hexene
cis-2,3,4-trimethyl-3-hexene
trans-2,3,4-trimethyl-2-hexene
cis-2,3,4-trimethyl-2-hexene
Choose the most stable alkene that obeys Saytzeff's rule.
CH3CH=CHCH3
(CH3)2C=C(CH3)2
CH3CH=CH2
(CH3CH2)CH=CHCH3
The conversion above can be carried out using
Hot acidified KMnO4
H2O in dilute H2SO4
cold alkaline KMnO4
Hot concentrated H2SO4
The mechanism for the following sequence of reactions is
Electrophilic addition reaction
Nucleophilic addition reaction
Electrophilic substitution reaction
Nucleophilic substitution reaction
An organic compound P undergo hydrogenation reaction. P also reacts with HCl to form 2-chlorobutane. Determine the structure of P.
CH3CH2CH=CH2
CH3C(CH3)=CH2
CH3CH=CH2
CH3CH2CH(OH)CH3
Which of the following reagents can be used to distinguish between alkane and alkene?
Hydrogen gas with a nickel catalyst
Chlorine water
Br2 in CH2Cl2 in the dark
Hot acidified potassium permanganate
Which of the following is NOT possibly an alkene?
C2H2
C4H8
C4H6
C6H8
Several reagents were reacted with 2-methyl-2-pentene. Which of the following products is NOT correct?
Reagents: H2 with Platinum catalyst
Product: 2-methylpentane
Reagents: Aqueous Bromine
Product: 3-bromo-2-methyl-2-pentanol
Reagents: H2O in dilute H2SO4
Product: 2-methyl-2-pentanol
Reagents: HBr in CH3OOCH3
Product: 2-bromo-2-methylpentane
Choose reaction(s) that follow(s) Markovnikov's rule.
I only
I and II
II and III
I, II and III
What is the name of the following alkene?
2,2-dichloro-6-methylcyclohexene
3,3-dichloro-1-methylcyclohexene
5,5-dichloro-1-methylcyclohexene
1,1-dichloro-3-methyl-2-cyclohexene
Which of the following statements about alkenes is NOT true?
They are unsaturated hydrocarbons
They undergo addition reaction
They can be attacked by electrophiles
They all have the general formula of CnH2n
Which reagent below will NOT attack 2-pentene?
Hydrogen chloride, HCl
Cl2 in CH2Cl2
Cyanide ion, CN-
Hydrogen ion, H+
The correct structural formula for m-isopropylbenzaldehyde is
The product which is formed in the following reaction is
How many delocalised π electrons must a planar and cyclical unsaturated hydrocarbon have if it is aromatic?
4
8
10
12
When benzene is treated with a nitrating mixture, nitrobenzene is formed.
Which of the following statements is CORRECT concerning nitration?
Nitration of benzene proceeds by electrophilic addition.
Nitration of benzene proceeds by a free radical mechanism.
The electrophile that attacks by the benzene ring is the NO2+ ion.
The electrophile that attacks by the benzene ring is NO2 molecule.
Why does benzene undergo substitution reactions rather than addition reactions?
Benzene is a planar, aromatic compound.
All the carbon atoms in benzene is sp2 hybridised.
All the carbon-carbon bonds in benzene are strong.
Benzene has extra stability due to the delocalized π electrons.
Which of the following structures follow Huckel’s rule?
The following reaction is known as
Friedel-Crafts alkylation
Friedel-Crafts acylation
Nucleophilic substitution
Electrophilic addition
Bromination of benzene is carried out using iron(III) bromide, FeBr3 as a catalyst. The function of FeBr3 in this reaction is to produce..... ?
Bromide free radicals
Bromide ions
Nucleophile
Electrophile
