Chemistry_2016_STPM term 3_Objectives

Chemistry_2016_STPM term 3_Objectives

12th Grade

15 Qs

quiz-placeholder

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Chemistry_2016_STPM term 3_Objectives

Chemistry_2016_STPM term 3_Objectives

Assessment

Quiz

Chemistry

12th Grade

Hard

Created by

Loh Jane

FREE Resource

15 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which compound is made up of 87.8% carbon and 12.2% hydrogen by mass?

CH3CH=CHCH2CH2CH3

H2C=CHCH2CH2CH=CH2

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Answer explanation

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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

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3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which compound has one tertiary carbon atom?

Butane

Ethylbenzene

Methylpropane

Dimethylpropane

Answer explanation

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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

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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

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6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which reaction represents a substitution reaction which occurs through nucleophilic mechanism?

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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

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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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