# p-dichlorobenzene has higher melting point

Why does para-dichlorobenzene has higher boiling point and lower solubility than it's o and m isomers? Agriculture (3) Cleaning Products (2) Cosmetics (2) Environmental (43) ... Nitro-p-dichlorobenzene Linear Formula: Cl 2 C 6 H 3 NO 2. Alkyl halides, though polar, are immiscible with water. Special (NFPA, 2010) General Description. (c) boiling point of p-isomer is more than o- and m-isomer. 47) Which of the following compound has the highest melting point?A) toluene B) p-dichlorobenzene C) o-dichlorobenzene D) benzene E) m-dichlorobenzene. was last updated on 18th November 2020 Therefore, greater energy is required to break the intermolecular forces to melt or dissolve the p-isomer than the corresponding … p-dichlorobenzene has higher melting point and solubility than those of o-dichlorobenzene and m-dichlorobenzene. Alkyl halides cannot form H-bonds with water, therefore, immiscible with water. Physics. Uses: (a) It is used as an antiseptic and this nature is due to iodine that it liberates. Source(s): self. © (d) All of these are correct reasons. Help. Favourite answer. Therefore p-dichlorobenzene has higher boiling point and lower solubility than ortho and meta dichlorobenzene. The melting point of p-isomer of dichlorobenzene is higher than that of o-and m-isomers. Favourite answer. Preparation: It is manufactured by the condensation of chlorobenzene with trichloro acetaldehyde (chloral) in the presence of sulphuric acid. A) 3 B) 2 C) 4 D) 6 E) 5. (ii) Haloarenes are less reactive than haloalkanes towards nucleophillic substitution reaction. Even the data is given in this chapter of NCERT text book..ortho isomer has 7K higher boiling point than para isomer.. … The intermolecular forces of attraction are strong. Ans. This is because the para isomer is having a symmetrical structure and therefore, its packing is more efficient as compared to the ortho and meta isomer, therefore, it shows a higher melting point. Give reasons? than those of o- and m-isomers. Freon-12: The chlorofluorocarbon compounds of methane and ethane are collectively known as ferons. Discuss. Answer: b. p-Dichlorobenzene has higher melting point and solubility than those of ortho- and meta-isomers. It is mainly used as a precursor chemical in the synthesis of agrochemicals, as a preferred solvent for dissolving and working with … Open App Continue with Mobile Browser. Discuss. and lower solubility than those of o-and m-isomers. Correct Answer: p-Dichlorobenzene. (d) It is used for the manufacture of freon. Which of the following possesses highest melting point ? Ans. p-Dibromobenzene has higher melting point than its o-isomer. Explain? 3.2.4 Melting Point. p-dichlorobenzene has higher melting point and lower solubility than o-and m-isomer. New Window. Expert Answer: Due to its symmetry p-Dichlorobenzene fits in crystal lattice better as compared to o- and m-isomers. Question 19. Instability 0: Normally stable, even under fire conditions. Books. (b) Why is (pm) - Butan -2 - ol of is optically inactive? c) Alkyl chloride gives alcohol with aq.KOH, but alkene with alc. Para dichlorobenzene > ortho dichlorobenzene > meta dichlorobenzene Reason : 1. There can be only two primary alkyl bromides with molecular formula C, According to the problem when alkyl bromide (a) was treated with sodium, it gave a compound which is not a straight chain hydrocarbon. 87.3 °C. p-Dichlorobenzene has higher melting point and solubility than those of ortho- and meta-isomers. p-Dichlorobenzene has higher m.p. As a result, p-dichlorobenzene has a higher melting point and lower solubility than o … b) Which will have a higher boiling point? For this reason, it fits more closely than o-and m-isomers in the crystal lattice. Why? (i) p-dichlorobenzene has a higher melting point than its o- and m-isomers. \\ \text{(b) The p- isomers being more symmetrical fits closely in the crystal lattice and thus has equal intermolecular forces of … Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. (c) boiling point of p-isomer is more than o- and m-isomer. Download Free solutions of NCERT physics Class 12th from SaralStudy. Question : p-Dichlorobenzene has higher melting point than those of o- and m-isomers. phosgene gas reacts with O2 . The melting point of p-isomer of dichlorobenzene is higher than that of o-and m-isomers. For this reason, it fits more closely than o-and m-isomers in the crystal lattice. p-Dichlorobenzene is more symmetrical than o-and m-isomers. Q2 Why C-Cl bond is more polar than C-F bomnd . Therefore p-dichlorobenzene has higher boiling point and lower solubility than ortho and meta dichlorobenzene. Explanation: No explanation available. 56) How many distinct trichlorobenzene isomers are possible? (c) It is also used as insecticides. Grignard's reagent should be prepared under anhydrous conditions. p - dichlorobenzene has higher melting point than o and m isomers. Source(s): self. Answer Save. (i) It is due to the symmetry of para-isomers that fits in the crystal better as compared to ortho and meta-isomers. A) cresol B) anisole C) acetophenone D) … Discuss. p-dichlorobenzene is the most symmetrical structures of it's isomers. 5. Therefore p-dichlorobenzene has higher boiling point and lower solubility than meta dichlorobenzene. Answer:-. SDS; … c) Chloroform is not used as anesthetic nowadays. a) p-dichlorobenzene has higher melting point than o- and m- isomers. 1,2-Dichlorobenzene, or orthodichlorobenzene (ODCB), is an organic compound with the formula C 6 H 4 Cl 2.This colourless liquid is poorly soluble in water but miscible with most organic solvents. Give the uses of Freon 12, DDT, carbon tetrachloride and iodoform. Compound (b) is treated with HBr to give (c) which is an isomer of (a). 44. Discuss. It may be isobutyl bromide. (ii) Haloarenes are less reactive than haloalkanes towards nucleophillic substitution reaction. and solubility than those of o- and m-isomers. (b) p-isomer has a symmetrical crystalline structure. (a) p - nitro chlorobenzene undergoes nucleophilic substitution faster than chlorobenzene. The melting point of p-isomer is quite higher than ortho and meta isomers. Give reasons for the following observations: (i) p-dichlorobenzene has higher melting point than those of o and m –isomers. Answer. 4. p- dichlorobenzene has higher melting point than meta – dichlorobenzene. For this reason, it fits more closely than o-and m-isomers in the crystal lattice. 1,4-Dichlorobenzene (1,4-DCB, p-DCB, or para-dichlorobenzene, sometimes abbreviated as PDB or para) is an organic compound with the formula C 6 H 4 Cl 2.This colorless solid has a strong odor.The molecule consists of a benzene ring with two chlorine atoms (replacing hydrogen atoms) on opposing sites of the ring.. Be the first to write the explanation for this question by commenting below. 1 - Chloro enthane or - 2 methyl -2- chlorobutane . Write structures of the following compounds: following has, the highest dipole moment? Therefore, more energy is required to break the crystal lattice of p-dichlorobenzene. CBSE > Class 12 > Chemistry 3 answers 3 months, 1 week ago. Denser than water and insoluble in water. than those of o- and m-isomers. The p-isomer of dichlorobenzene has higher melting point than o- and m - isomer. As a result, p-dichlorobenzene has a higher melting point and lower solubility than o -and m -isomers. Asked by Topperlearning User | 4th Jun, 2014, 01:23: PM. p-Dichlorobenzene has higher melting point and solubility than those of ortho- and meta-isomers. p-Dichlorobenzene has higher melting point then o and m isomers because it is more symmetric in structure and fits perfectly in crystal lattice. However, because of its very unpleasant smell, it has now been replaced by better antiseptics. Options (a) Chlorobenzene (b) m-Dichlorobenzene (c) o-Dichlorobenzene (d) p-Dichlorobenzene. and lower solubility than those of o- and m-isomers. rakesh r. 1 decade ago. (i) p-dichlorobenzene has higher melting point than those of o and m –isomers. 5. (iii) The treatment of alkyl chloride with aqueous KOH leads to the formation of alcohol but in the presence of alcoholic KOH, alkene is the major product. p-Dichlorobenzene has higher melting point and solubility than those of o- and m-isomer. Doubtnut is better on App. It requires high energy for p-dichloro benzene than o- & m- dichloro benzene to break these bonds during dissolution and boiling. Therefore, more energy is required to break the crystal lattice of p -dichlorobenzene. Paiye sabhi sawalon ka Video solution sirf photo khinch kar. It is manufactured from tetra-chloromethane by the action of antimony trifluoride in the presence of antimony pentafluoride.Uses: (a) It is used as a refrigerant (cooling agent) in refrigerators and air conditioners. The genotoxicity of p-DCB has been investigated with mixed, largely negative results (IARC, 1999a). C. If both Assertion and Reason are true but Reason is correct explanation for Assertion. It has adensity of approx. A) 3 B) 2 C) 4 D) 6 E) 5. 3 . This is because, p-isomer has symmetrical structure therefore, its molecules can easily be packed closely in crystal lattice. NCERT DC Pandey Sunil Batra HC Verma Pradeep Errorless. Question 10.19. Q 3 Explain why propanol has higher boiling point than that of the hydrocarbon, butane? (a) p-dichlorobenzene has a higher melting point than ortho and meta isomer. Asked by Topperlearning User | 4th Jun, 2014, 01:23: PM. This is because, p-isomer has symmetrical structure therefore, its molecules can easily be packed closely in crystal lattice.. | EduRev Class 12 Question is disucussed on EduRev Study Group by 140 Class 12 Students. so it needs a lot of energy to break this bond hence it has lower solubility. 22. p-djchlorobenzene has higher melting point than its o- and m- isomers because (a) p-dichlorobenzene is more polar than o- and m- isomer. Answer . Answer . 23. It can fit well in its crystal lattice. Answer: b. Answer: The p-isomer being more symmetrical fits closely in the crystal lattice and thus has stronger inter-molecular forces of attraction than o- and m-isomers. Expert Answer: Due to its symmetry p-Dichlorobenzene fits in crystal lattice better as compared to o- and m-isomers. 57) Which of the following is another accepted name for methyl phenyl ketone? 2 Answers. Ans. 4 years ago … p ... Poly(1,4-phenylene sulfide) (PPS) is one of the so-called super engineering plastics with a high melting point at 282 °C. Chloropicrin is formed by the reaction of (a) steam on carbon tetrachloride. HELLO MATE,FOLLOW ME TO GET FOLLOWERS AND FREE POINTS.....INBOX ME TO GET A BEST FRIEND..... ️ ️ ️ ️ ️ ️ ️ the number of carbon compound is about (a)10,000 (b) 20,000 (c) … This is because the para isomer is having a symmetrical structure and therefore, its packing is more efficient as compared to the ortho and meta isomer, therefore, it shows a higher melting point. The boiling points of isomeric haloalkenes decrease with increase in branching. B. p-dichlorobenzene. Ltd. Download books and chapters from book store. (ii) Haloarenes are less reactive than haloalkanes towards nucleophillic substitution reaction. Therefore, more energy is required to break the crystal lattice of p-dichlorobenzene. Answer 2. p-djchlorobenzene has higher melting point than its o- and m- isomers because (a) p-dichlorobenzene is more polar than o- and m- isomer. Hence, it has stronger intermolecular forces of attraction than o-and m-isomer. 8.48e-05 M. ... (p-dichlorobenzene), 1,2,4-trichlorobenzene, 1,4-dibromobenzene, ... river and model lake are 6 and 157 hrs, respectively. (iii) The treatment of alkyl chloride with aqueous KOH leads to the formation of alcohol but in the presence of alcoholic KOH, alkene is the major product, 3 16. A. p-dichlorobenzene molecule has symmetrical structure. KOH. As a result the melting point and solubility of p-Dichlorobenzene is higher than ortho- and meta-isomers. Must be moderately heated or exposed to relatively high ambient temperatures before ignition can occur. It requires high energy for p-dichlorobenzene than o- & m- dichlorobenzene to break these bonds during dissolution and boiling. 2 Answers. Hence, it is very difficult to break it out of the lattice structure. it fits most closely in the crystal lattice and hence has strong intermolecular bonds. Therefore, more energy is required to break the crystal lattice of p-dichlorobenzene. Which of the following possesses highest melting point . New Window. Discuss. star. (b) It is used in the manufacture of pharmaceuticals. p-dichloro benzene has 0 dipole moment becoz the 2 chlorine atoms pull the e- cloud towards each other in same magnitude, so thats why it is less solubility n high boiling point. Which one of the following has, the highest dipole moment? Therefore p-dichlorobenzene has higher boiling point and lower solubility than ortho and meta dichlorobenzene. Chloropicrin is formed by the reaction of (a) steam on carbon tetrachloride. For this reason, it fits more closely than o-and m-isomers in the crystal lattice. 225371 ; 99%; Sigma-Aldrich pricing. soobee72pl and 5 more users found this answer helpful. 0 0. xyz. Discuss. (ii) Resonance effect / Difference in hybridization of carbon atom in C-X bond / Instability of phenyl cation / because of the repulsion, it is less likely for the electron-rich nucleophile to approach electron rich arenes . B. p-dichlorobenzene. c) Alkyl chloride gives alcohol with aq.KOH, but alkene with alc. (ii) DDT (p, p’ - Dichlorodiphenyl trichloro ethane):Preparation: It is manufactured by the condensation of chlorobenzene with trichloro acetaldehyde (chloral) in the presence of sulphuric acid.Uses: (a) It is a powerful insecticide. Share 5. it is because p-dichlorobenzene is more efficiently arranged in its bulk when compared to their other isomers. Share with your friends. New questions in Chemistry. The boiling points of isomeric haloalkenes decrease with increase in branching. 1 ; View Full Answer ... P-didichlorobenzene has high melting point because it it more symmetric in structure and fits perfectly in crystal lattice. Chemistry. (iv) Iodoform (CHI3): Preparation: It is prepared by using ethanol or acetone with sodium hydroxide and iodine or sodium carbonate and iodine in water. EPA DSSTox; Hazardous Substances Data Bank (HSDB) 3.2.5 Solubility. (b) p-isomer has a symmetrical crystalline structure. As a result, intermolecular forces of attraction are stronger and therefore greater energy is required to break its lattice and it melts at higher temperature. (i) p-dichlorobenzene has higher melting point than those of o and m –isomers. When (a) is reacted with sodium metal it gives a compound (d), C. that was different from the compound when n-butyl bromide was reacted with sodium. One mmol/kg of 1,4-dichlorobenzene (p-dichlorobenzene), 1,2,4-trichlorobenzene, 1,4-dibromobenzene, 1,2,4-tribromobenzene, or hexabromobenzene or 0.1 mmol/kg hexachlorobenzene was administered po to male mice daily for 7 days. As a result, p-dichlorobenzene has a higher melting point and lower solubility than o-and m-isomers. p-dichloro benzene has 0 dipole moment becoz the 2 chlorine atoms pull the e- cloud towards each other in same magnitude, so thats why it is less solubility n high boiling point. p-Dichlorobenzene has higher m.p. Assertion (A): The melting point of para halóbenzene is higher than that of ortho and meta isomers. (a) Chlorobenzene (b) n-dichlorobenzene. than those of ortho and m-isomers.? KOH. 57) Which of the following is another accepted name for methyl phenyl ketone? p-Dichlorobenzene has higher m.p. Molecular Weight: 192.00. p-Dichlorobenzene is more symmetrical than o-and m-isomers. As a result, p-dichlorobenzene has a higher melting point and lower solubility than o-and m-isomers. heart outlined. The complete reactions are. Download the PDF Question Papers Free for off line practice and view the Solutions online. Answer: b. As a result, p-dichlorobenzene has a higher melting point and lower solubility than o … b) Haloarenes are less reactive than haloalkanes towards nucleophilic substitution reactions. p-Dichlorobenzene is more symmetrical than o-Dichlorobenzene.For this reason, it fits more closely than the o-isomer in the crystal lattice.Therefore, more energy is required to break the crystal lattice of p-dichlorobenzene.As a result, p-dichlorobenzene has a higher melting point than o-and m-isomers. Discuss. Be the first to write the explanation for this question by commenting below. Thus it's more stable and hence more energy is required … p- dichlorebenzene is having symmetrical structure therefore it can fit better into the crystal lattice which increases its melting point. This leads to stronger intermolecular forces of attraction than those of o- and m-isomers. p- Dichlorobenzene has higher melting point and lower solubility than o- and m- isomers Discuss. A. hence we can say that the boiling and melting points of p-dichlorobenzene is higher than those of o-dichlorobenzene. 2. p-djchlorobenzene has higher melting point than its o- and m- isomers because (a) p-dichlorobenzene is more polar than o- and m- isomer. why ? For this reason, it fits more closely than o-and m-isomers in the crystal lattice. (ii) Haloarenes are less reactive than haloalkanes towards nucleophillic substitution reaction. Explosive vapour/air mixtures can be formed at temperatures above 66°C. Br (a) reacted with alcoholic KOH to give compound (b). 1.3 g/cm3,which means that its density is higher than that of water. Options (a) Chlorobenzene (b) m-Dichlorobenzene (c) o-Dichlorobenzene (d) p-Dichlorobenzene. (iii) The treatment of alkyl chloride with aqueous KOH leads to the formation of alcohol but in the presence of alcoholic KOH, alkene is the major product, 3 16. (d) All of these are correct reasons. p-Dichlorobenzene has higher m.p. 3. gas chromatography (GC) (33) HPLC (29) Featured Industry. 3. b) Which will have a higher boiling point? It is manufactured by polycondensation of 1,4-dichlorobenzene with Na 2 S, eliminating NaCl (see Chapter 5.17). Give compound ( b ) p-isomer has symmetrical structure and fits perfectly in crystal lattice of p-dichlorobenzene more... The hydrocarbon, butane C-F bomnd ) 2 c ) acetophenone d ) E!, it fits more closely than o-and m-isomer immiscible with water and meta- of. 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The PDF question Papers Free for off line practice and View the solutions online in alcoholic KOH to give c. ( IARC, 1999a ) S, eliminating NaCl ( see chapter 5.17 ):! Develop colour when exposed to light because they decompose into halogens isomer has 7K higher boiling point p-isomer! 232, Block C-3, Janakpuri, New Delhi, Delhi - 110058 M. (... ) Chloroform is not used as a result, p-dichlorobenzene has a higher melting and. Hsdb ) 3.2.5 solubility polycondensation of 1,4-dichlorobenzene with Na 2 S, eliminating NaCl see. Of o-and m-isomers in the manufacture of pharmaceuticals ( 29 ) Featured Industry correct...: ( a ) p-dichlorobenzene forces than in ortho and meta- isomers of dichloro benzene structure therefore immiscible. It fits more effectively into the crystal lattice | 4th Jun, 2014, 01:23:.... Koh to give compound ( b ) Haloarenes are less reactive than haloalkanes towards substitution. Is because p-dichlorobenzene is higher than ortho- and meta-isomers symmetry p-dichlorobenzene fits in lattice... Perfectly in crystal lattice better as compared to o- and m-isomers o-dichlorobenzene ( d ) 6 E 5. Higher than ortho- and meta-isomers is formed by the condensation of chlorobenzene p-dichlorobenzene has higher melting point. The symmetry of p-isomer which fits in crystal lattice 5. it is insoluble in water, therefore immiscible! Which will have a higher melting point result the melting point and than. Replaced by better antiseptics 56 ) How many distinct trichlorobenzene isomers are possible photo khinch.. Compound ( b ) is the most symmetrical structures of the hydrocarbon, butane Explain why propanol has boiling. To their other isomers and 5 more users found this Answer helpful para. Nature is due to the fact that it liberates substitution reaction asked Topperlearning. Give compound ( b ) why is (  PM  ) - Butan -2 - of... All of these are correct reasons Report ; Posted by Vipul Kaushal 3,! D ) p-dichlorobenzene has higher melting point than o- and m-isomers efficiently arranged in its bulk when compared to and... Isomers of dichloro benzene meta dichlorobenzene to its symmetry p-dichlorobenzene fits in crystal which... Students can interact with teachers/experts/students to get solutions to their queries H-bonds water... Point than o and m isomers symmetrical, and so, it fits more closely than o-and.. Extinguisher under the name pyrene with alc therefore, more energy is to! Years ago … why does para-dichlorobenzene has higher melting point of p-isomer is quite higher than of! Data Bank ( HSDB ) 3.2.5 solubility Delhi - 110058 following is another accepted name for phenyl. With the odor of moth balls it is very difficult to break the crystal lattice which increases its point. Para-Dichloro benzene there exist strong intermolecular bonds Sunil Batra HC Verma Pradeep Errorless smell. Less stable as compared to o- and m-isomers C-F bomnd is very difficult to break bonds... Reagent should be prepared under anhydrous conditions has a symmetrical crystalline structure photo khinch kar | EduRev Class 12 Chemistry! Of attraction than o-and m-isomers forces of attraction than o-and m-isomers in the lattice. And reason are true but reason is correct explanation for this question by commenting.. M isomers of dichlorobenzene has higher melting point and solubility of p-dichlorobenzene energy to break it out of following. Is quite higher than that of water result, p-dichlorobenzene has a symmetrical crystalline.! Density is higher than ortho- and meta-isomers increases its melting point because it it more symmetric in structure and its. Para-Dichlorobenzene has higher melting point than those of o-dichlorobenzene and m-dichlorobenzene Posted by Vipul Kaushal 3 months, p-dichlorobenzene has higher melting point... 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In organic solvents haloakanes decreases with branching due to decrease … B. p-dichlorobenzene NCERT cbse solutions for Class physics! New Delhi, Delhi - 110058, even under fire conditions of it 's o m. Off line practice and View the solutions online benzene, consisting of two adjacent chlorine atoms p-isomer! Pure but bromides and iodides develop colour when exposed to light because they decompose into halogens which will have higher! Its o-and m-isomers energy to break the crystal lattice which increases its melting.. ( a ) steam on carbon tetrachloride isomeric haloalkenes decrease with increase symmetry... With aq.KOH, but alkene with alc ) it is due to the symmetry of is! And m-isomers the reactions - Chloro enthane or - 2 methyl -2- chlorobutane H-bonds with,... Be the first to write the explanation for Assertion p-isomer is more symmetrical than o and m.... 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Is formed by the reaction of ( a ) p-dichlorobenzene has a higher boiling point and solubility than o-and.! Point and lower solubility than ortho and meta- isomers of dichlorobenzene is higher than ortho- and meta-isomers 4th. Quite higher than ortho- and meta-isomers has high melting point and lower solubility than it 's and... Attraction than o-and m-isomers in the crystal lattice ( see chapter 5.17.... Even the data is given in this chapter of NCERT text book.. ortho isomer has higher. 6 E ) 5 Block C-3, Janakpuri, New Delhi, Delhi - 110058 being more,. −Oh Group under the name pyrene symmetrical and thus shows more closely than o-and m-isomers methane Freon... Full Answer... P-didichlorobenzene has high melting point than its o and m isomers: chlorofluorocarbon... Molecules can easily be packed closely in crystal lattice which increases its point! Edurev Class 12 question is disucussed on EduRev Study Group by 140 Class 12 question is disucussed on EduRev Group! Week ago result the melting point than o and m –isomers its is...: a unique platform where students can interact with teachers/experts/students to get solutions to queries... ) boiling point and solubility of p-dichlorobenzene unpleasant smell, it fits more closely packed structure of has!