Which compound is made up of 87.8% carbon and 12.2% hydrogen by mass?
Chemistry_2016_STPM term 3_Objectives

Quiz
•
Chemistry
•
12th Grade
•
Hard
Loh Jane
FREE Resource
15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
CH3CH=CHCH2CH2CH3
H2C=CHCH2CH2CH=CH2
Answer explanation
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
An organic compound which shows cis-trans isomerism is
1-bromo-2-methylpropene
1, 1-dibromo-2-methylpropene
2, 3-dibromo-2-butene
1-bromo-1-chloro-2-methyl 1-butene
Answer explanation
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which compound has one tertiary carbon atom?
Butane
Ethylbenzene
Methylpropane
Dimethylpropane
Answer explanation
4.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
An organic compound undergoes oxidation and addition reactions with acidified potassium permanganate solution under different conditions. The compound is
Answer explanation
Oxidation and addition with KMnO4 indicates the presence of non-aromatic C = C bonds.
Two possible answer is A and C
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1 , 1-Dichloroethane and 1 , 2-Dichloroethane are structural isomers. What are the products formed when both isomers are hydrolysed separately in dilute hydrochloric acid?
HOCH2CH2OH and CH3CHO
HOCH2CH2OH and CH3CH(OH)2
HOCH2CH2Cl and CH3CHO
HOCH2CH2OH and CH3CH(OH)Cl
Answer explanation
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which reaction represents a substitution reaction which occurs through nucleophilic mechanism?
Answer explanation
Nucleophilic substitution is exhibited by haloakanes :
R — X + Nu- → R — Nu + X-
Option A is electrophilic substitution.
Option B is electrophilic substitution.
Option D is electrophilic addition.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A compound , X, is a crystal with an antiseptic smell. X can be used to synthesise compound with a structural formula CH3COOC6H5 by firstly forming Y as in the reaction scheme shown.
What suitable reagents are used in Step Ⅰ and Step Ⅱ?
Step Ⅰ : Na
Step Ⅱ : CH3COCI
Step Ⅰ : NaOH
Step Ⅱ : CH3CONH2
Step Ⅰ : PCl5
Step Ⅱ : CH3COO- Ag+
Step Ⅰ : PCl5
Step Ⅱ : C6H5COCI
Answer explanation
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