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The correct choice is (d) All of the mentioned

Explanation: BHC (Benzene Hexachloride or Hexachlorocyclohexane), in thisBenzene is chlorinated in the liquid PHASE in the presence of an ACTIVATION agent such as activating light, gamma RAYS, or elemental fluorine. A mixture of five ISOMERS of 1,2,3,4,5,6-hexachlorocyclohexane is produced .

The CORRECT ANSWER is (B) 1,2,2-Trichloro-2,2-bis(p-chlorophenyl) methane

Explanation: The FORMULA of DDT is: 1,1,1-Trichloro-2,2-bis(p-chlorophenyl) ETHANE.

Right option is (b) Hemiacetal

For explanation I would SAY: Ethyl ALCOHOL either absolute or containing water is CHLORINATED to form the hemiacetal of TRICHLOROACETALDEHYDE from which chloral is liberated by treatment with concentrated sulfuric acid.

The correct answer is (d) All of the mentioned

Easiest explanation: CHLORINATION CATALYSED by Active Carbon. When carbon of different densities is subjected to superheated steam, its surface is vaporized, forming capillaries which have the property of absorbing gases and compressing them into much SMALLER volumes. This COMPRESSION, possibly COMBINED with the catalytic effect of the metal impurities present in the carbon, promotes

Right option is (d) Both Br and I

The best I can explain: Bromine and iodine, because of their capacity to form mixed HALOGENS, e.g., BrCI, BrFa, and ICI which have a low ENERGY of activation, are excellent halogenation catalysts. In general, it can be stated that small QUANTITIES of iodine and bromine are frequently ADDED ALONG

Right OPTION is (a) QUANTUM

The explanation is: The amount of energy REQUIRED to raise a molecule to a HIGHER energy level is called a quantum. One of the factors that make up a quantum is a true energy value given i.e. ergs and called Planck’s constant, but the FORMULA for a quantum =h X constant/wavelength ( cm ).

Right answer is (d) All of the mentioned

To elaborate: Under atmospheric conditions, FLUORINE ATTACKS with violence all organic COMPOUNDS; benzene, ether, and turpentine take fire immediately on contact with it. Explanations of this violent and disruptive ACTIVITY that are in harmony with theoretical considerations.

The correct choice is (C) All of the mentioned

Explanation: PHOTO halogenation can be broadly defined as the effect of electromagnetic radiation on halogenation reactions and includes reactions which may be PRODUCED by all wavelengths from those of radio waves through x-rays, gamma rays, etc., into COSMIC rays.

Right ANSWER is (b) REPLACEMENT reaction

Easiest explanation: The above reaction is CALLED Replacement reaction because Iodine ATOM REPLACES Chlorine atom.

Right answer is (a) Yes

For explanation I would say: The physical and chemical AGENCIES such as light, SOLVENT, and TEMPERATURE exert their peculiar influence on the peroxide molecules or in activating the OXYGEN liberated by the decomposition of the peroxides.

Correct ANSWER is (a) Because it’s milder

The best explanation: In general, methods similar to chlorination with chlorine and CHLORIDES can be employed in the preparation of bromine derivatives. Because the reaction is milder, the bromination of the paraffin hydrocarbons does not proceed so rapidly or to a GREAT degree; and with the LOWER permissible OPERATING temperature, the formation of polybromine compounds occurs to a lesser extent.

The CORRECT option is (a) Sandmeyer’s reaction

The explanation: The Sandmeyer reaction is a VALUABLE PROCEDURE for the preparation of halogen DERIVATIVES, such as fluorobenzene that generally cannot be made by other more direct METHODS.

The correct ANSWER is (c) Sandmeyer’s REACTION

For EXPLANATION I would SAY: The reaction is called Sandmeyer’s reaction because of the formation of DIAZONIUM solution, and sandmeyer’s reaction is used in formation of fluorination.

Correct choice is (b) Acid chlorides

Easiest explanation: Acid chlorides can be made from the corresponding fatty acids by TREATMENT with PHOSPHORUS halides such as : RCOOH + PCI5 ——-> RCOCl + POCL3 + HCI.

The correct option is (c) Alkali HYPOCHLORITE

For EXPLANATION I would say: On chlorinating Alkali hypochlorite we GET hydroxy or methoxybiphenyl, the reaction is as FOLLOWS : C6H5-C6H5-OH ————–> C6H5-C6H5-Cl-OH.

The correct answer is (B) ALKENE

For EXPLANATION I would say: For EXAMPLE, when propylene DICHLORIDE is treated with an alcoholic solution of potassium hydroxide at ordinary temperatures, a-chloropropylene will be formed. Therefore in presence of Alcoholic KOH we convert Alkyl to Alkene (double bond).

Correct choice is (b) False

The explanation: During Halogen Exchange reaction, the ALKYL halides and unsaturated aliphatic compounds can simultaneously be obtained by treating halogenated aliphatic carboxylic acids, NITRILES, or esters with aliphatic ALCOHOLS and/or ethers in the temperature range 260-320°0 and 700 lb PRESSURE. During the course of the reaction, HYDROGEN chloride is split out, the hydrogen and chlorine coming from adjacent carbon atoms. Under the conditions of reaction, the hydrogen chloride converts the reacting alcohol to the corresponding halide.

The correct option is (a) CHCl=CHCl

To explain: CH2=CH2 + 2Cl2 + O2 ——–> CHCl=CHCL +2H2O, This REACTION is used for the PREPARATION of Chlorolefins, here we USE oxygen to convert any HYDROGEN chloride formed or introduced into active chlorine.

The correct ANSWER is (a) Reactor

Explanation: A CATALYTIC tower is a TYPE of a reactor tower, where catalytic reaction TAKES place.

Right answer is (C) Carbon Tetrachloride

The explanation is: CHLORINATION of Carbon Disulphide., the reaction is as follows CS2 + 3Cl2 —–> CCl4 + S2Cl2. , HENCE we GET Carbon Tetrachloride as product.

Right answer is (B) Chlorination of Acetaldehyde

For explanation I WOULD say: Chlorination of Acetaldehyde. In some commercial processes for chloral, acetaldehyde, or its CONDENSATION product, paraldehyde is chlorinated under hydrous CONDITIONS.

Right option is (a) C6H5-CCl3

The best I can explain: BENZOTRICHLORIDE ACTS as a chlorinating AGENT, whose FORMULA is C6H5-CCl3.

Right choice is (d) All of the mentioned

The explanation: halogenations may involve REACTIONS of (1) ADDITION, (2) SUBSTITUTION, Le. of hydrogen, (3) replacement, i.e., of groups, for example, the hydroxyl or sulfonic ACID group.

The CORRECT answer is (d) Fluorine

The EXPLANATION is: The fluorine derivatives is well established in the FIELDS of refrigerants and aerosol propellants because of their stability and LOW boiling points.