BHC (Benzene hexachloride) is made by the chlorination of benzene (A) Which is an addition reaction (B) Which is a substitution reaction (C) In absolute dark (D) In presence of sunlight

BHC (Benzene hexachloride) is made by the chlorination of benzene
(A) Which is an addition reaction
(B) Which is a substitution reaction
(C) In absolute dark
(D) In presence of sunlight
by

1 Answer

Answer :

(A) Which is an addition reaction
by

Related questions

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Last Answer : (D) Benzene hexachloride is not a contact insecticide

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Last Answer : (B) Lead or glass

Adding Cl2 to benzene in the presence of AlCl3 is an example of – (1) Elimination reaction (2) Substitution reaction (3) None of the options (4) Addition reaction

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Benzene reacts with concentrated HNO3 in the presence of concentrated H2SO4 to give nitrobenzene. This reaction is an example of (a) Electrophilic addition (b) Nucleophilic addition (c) Electrophilic substitution (d) Nucleophilic substitution

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Benzene reacts with concentrated HNO3 in the presence of concentrated H2SO4 to give nitrobenzene. This reaction is an example of (a) Electrophilic addition (b) Nucleophilic addition (c) Electrophilic substitution (d) Nucleophilic substitution

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The chlorination of methane to give CCl4 is an example of (a) an electrophilic addition (b) a free-radical substitution (c) a nucleophilic addition (d) an electrophilic substitution

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Benzene undergoes substitution reaction more easily than addition reaction because (a) it has a cyclic structure (b) it has three double bonds (c) it has six hydrogen atoms (d) there is delocalization of electrons

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Last Answer : there is delocalization of electrons

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Benzene cannot undergo – (1) Substitution (2) Addition (3) Elimination (4) Oxidation

Description : Benzene cannot undergo – (1) Substitution (2) Addition (3) Elimination (4) Oxidation

Last Answer : (3) Elimination Explanation: Benzene can not undergo Elimination reaction.

An organic compound (A) has a molecular weight 78 and an empirical formula CH. (A) is resistant to attack by oxidizing agents but undergoes substitution and addition reactions. X-ray analysis shows that the distance between adjacent carbon atoms is 1.39Å (intermediate between single and double bond lengths). The evidence suggests that compound (A) is (a) Benzene (b) Cyclohexane (c) Toluene (d) n-Hexane

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Last Answer : Benzene

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Last Answer : Benzene

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Benzene cannot undergo : (1) Substitution (2) Addition (3) Elimination (4) Oxidation

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Phenol is more reactive than benzene towards electrophilic substitution reaction. In case of Phenol, the intermediate carbocation is more resonance st

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What purpose does FeCl3 serve in the electrophilic aromatic substitution reaction between chlorine and benzene? (a) It serves as a radical initiator to produce the chlorine radical needed to propagate the chain reaction. (b) It functions by destabilizing the carbocationic intermediate and thereby increases the rate of H+ loss. (c) It serves as a Lewis base catalyst by reacting with Cl2 to generate chloride ions. (d) It serves as a Lewis acid catalyst by reacting with the Cl2 and thereby activates it toward attack by benzene’s π electrons.

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Last Answer : It serves as a Lewis acid catalyst by reacting with the Cl2 and thereby activates it toward attack by benzene’s π electrons.

What positional isomers of pentachlorobenzene are formed during chlorination of benzene?

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Last Answer : D. Radical substitution (Answer)

The characteristic reaction of carboxylic acids is : (a) electrophilic addition (b) electrophilic substitution (c) nucleophilic addition (d) nucleophilic substitution

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Last Answer : nucleophilic substitution

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Why does benzene undergo electrophilic substitution reactions easily and nucleophilic substitutions with difficulty?

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How an — OH group attached to carbon in the benzene ring activates benzene towards electrophilic substitution ?

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Last Answer : The lone pair of electrons present on oxygen atom enter into resonance with the benzene ring. As a result, the electron density becomes higher at o- and p- position and due to higher electron density, the ring gets activated towards electrophilic substitution.

Which of the reactions between the following pairs of reagents proceeds by a mechanism that may be described as an electrophilic substitution? (a) Benzene + Br2/FeBr3 (b) Propene + Br2 (c) Acetone + NH2NH2 (d) Ethyl bromide + aq KOH

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Last Answer : Benzene + Br2/FeBr3

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Last Answer : Cyclohexane

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Chloral is used in the manufacture of (A) DDT (B) BHC (C) Parathion (D) None of these

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Last Answer : (B) C6Cl6

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Description : Photo chemical smog is a result-ant of the reaction among – (1) High concentration of NO2, O3, and CO in the evening (2) CO, CO2 and NO2 at low temperature (3) CO, O2 and peroxy acetyl nitrate in the presence of Sunlight (4) NO2, O3 and peroxy acetyl nitrate in the presence of Sunlight

Last Answer : (4) NO2, O3 and peroxy acetyl nitrate in the presence of Sunlight Explanation: Photochemical smog is a unique type of air pollution which is caused by reactions between sunlight and pollutants like hydrocarbons and nitrogen dioxide (NO and NO2).

Give reason: Alkanes undergo only substitution reactions but alkenes and alkynes undergo both substitution and addition reactions.

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Last Answer : Once the nucleophile adds to an aldehyde, neither H− nor R− can be eliminated since they are strongly basic

Which of the following characterizes the reactions of aldehydes and ketones? (a) electrophilic addition (b) electrophilic substitution (c) nucleophilic acyl substitution (d) nucleophilic addition; free radical addition

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Last Answer : nucleophilic addition; free radical addition

Acetone reacts with HCN to form a cyanohydrin. It is an example of (a) Electrophilic addition (b) Electrophilic substitution (c) Nucleophilic addition(d) Nucleophilic substitution

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Last Answer : Nucleophilic addition

Which statement about the carbonyl group of ketones and aldehydes is true? I. It can attract nucleophiles. II. It can attract electrophiles. III. It tends to undergo addition reactions. IV. It tends to undergo substitution reactions. (a) I and III (b) II and IV (c) I, II, and III (d) I, III, and IV

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Last Answer : I, II, and III

Alkyl halides undergo (a) Electrophilic substitution reactions (b) Electrophilic addition reactions (c) Nucleophilic substitution reactions (d) Nucleophilic addition reactions

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Which one of the following could NOT cause a change in the mRNA ―reading frame‖? a. Insertion Sequence b. Base-Pair Substitution c. Base Addition d. Base Deletion

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Description : Which of the following can be made by the action of CH3Cl on benzene in the presence of aluminium chloride? (a) Ethylbenzene (b) o-Xylene (c) Chlorobenzene (d) m-Xylene

Last Answer : o-Xylene

BHC is the common name of....?

Description : BHC is the common name of....?

Last Answer : Gamaxin

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