Haloalkanes and Haloarenes Online Mock Test For Class 12 Chemistry

By admin / December 1, 2024

Class 12 Chemistry Online Free Mock Test

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Haloalkanes and Haloarenes Online Mock Test Chemistry

The total number of questions: 15 MCQ
Pattern of MCQ: Out of 4 question, only 1 will be correct.
Duration of Mock Test: 20 minutes to ensure time management among students.
Score: After submitting the test, you can see your scores.

Test Instructions

Please note that you will be allowed to take this test only once. So, kindly check the machine & internet connection are working before the test is started. We hope that you will give the test with complete focus and honesty.

1 / 15

AgCN reacts with haloalkanes to form isocyanide. Haloalkanes react with KCN to form alkyl cyanides as main product

KCN is mainly covalent in nature

KCN provides cyanide ions in solution.

AgCN provides cyanide ions in solution.

AgCN is mainly ionic in nature

2 / 15

R-CH₂-CCl₂-R $\overset{Reagent}{\to}$ R-C $\equiv$ C-R. The reagent is

HCl in H2O

KOH in C2H5OH

Zn in alcohol

3 / 15

The alkyl halide is converted into an alcohol by:

Addition

Dehydrohalogenation

Substitution

Elimination

4 / 15

In the reaction, R – X + NaoR’ → ROR’ + X ( – ve ion) The main product formed is

Ether

Alcohol

Carbonyl

Ester

5 / 15

Bromomethane, Chloromethane, Dibromomethane. 1 – Chloropropane, Isopropyl chloride, 1 – Chlorobutaneare all

Slightly soluble in organic solvents

Insoluble in organic solvents

Completely soluble in organic solvents

Completely soluble in water

6 / 15

Action of RMgX with vinyl chloride

alkane

alkene

alkyne

all of them

7 / 15

The reactivity order of halides for dehydrohalogenation is

R-F>R-Cl>R-Br>R-I

R-I>R-Br>R-Cl>R-F

R-I>R-Cl>R-Br>R-F

R-F>R-I>R-Br>R-Cl

8 / 15

What is produced when Br₂ is added to cis-but-2-ene?

Racemic mixture of 2,3-Dibromobutane

Meso form of 2,3-Dibromobutane

Dextro form of 2,3-Dibromobutane

Laevo form of 2,3-Dibromobutane

9 / 15

CH₃= CH₂CH₃ + H – I → CH₃CH₂CH₂I + CH₃CHICH₃ (major) This reaction is

Finkelstein reaction

Sandmeyer’s reaction

Free radical halogenations

Markovnikov’s rule.

10 / 15

Benzene on reaction with a mixture of HNO₃ and H₂SO₄ followed by reaction of Cl₂/FeCl₃ gives-

3-chloro -1 -nitrobenzene

2-chloro -1 -nitrobenzene

4-chloro -1 -nitrobenzene

a mixture of 2-chloro and 4-chloro -1 -nitrobenzene

11 / 15

The reaction RX + 2Na + RX ---------> R – R + 2NaX is called.

Wurtz reaction

Fittig reaction

Williamson’s synthesis

Sandmeyer’reaction

12 / 15

X -----(Cl2)-------> Benzotrichloride -----(Hydrolysy)-------> Y

X and Y respectievely are:

benzene, benzaldehyde

toluene, benzaldehyde

toluene, benzoic acid

benzene, benzoic acid

13 / 15

Ethyl chloride is converted into diethyl ether by -

Wurtz reaction

Grignard reaction

Perkin's reaction

Williamson's synthesis

14 / 15

For the same alkyl group, an alkyl iodide has a higher boiling point than alkyl fluoride because,

Iodide is bigger in size

Iodide has more electrons

all of these

the magnitude of van der Waal forces

15 / 15

In SN₂ reactions, the correct order of reactivity for the following compounds : CH₃Cl, CH₃CH₂Cl, CH₃2CHCl and CH₃3CCl is :

1. CH₃Cl>CH₃2CHCl>CH₃CH2Cl>CH₃3CCl
2. CH₃Cl>CH₃CH₂Cl>CH₃2CHCl>CH₃3CCl
3. CH₃CH2Cl>CH₃Cl>CH₃2CHCl>CH₃3CCl
4. CH₃2CHCl>CH₃CH₂Cl>CH₃Cl>CH₃3CCl

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