Ammonia, NH3 And Hydrazine, NH2NH2, Are Two Compounds Of ...

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Sign InAmmonia, $N{H_3}$ and hydrazine, $N{H_2}N{H_2}$, are two compounds of nitrogen, ${N_2}$. Which statement is correct?A.The N-N bond in $N{H_2} - N{H_2}$ is polar.B.$N{H_3}$ and $N{H_2}N{H_2}$ have lone pairs of electrons but ${N_2}$ does not. C.The oxidation number of each nitrogen in $N{H_2}N{H_2}$ is +2.D. The reaction of nitrogen with hydrogen has a high activation rate.

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• Ammonia NH3 and hydrazine NH2N...

AnswerStudy MaterialsNCERT Solutions For Class 12Important Questions for Class 12Revision Notes for Class 12NCERT BooksMaths Formula for Class 12Sample PapersClass 12 MathsClass 12 PhysicsClass 12 ChemistryClass 12 BiologyClass 12 EnglishClass 12 Computer ScienceClass 12 Business StudiesClass 12 EconomicsClass 12 AccountancyClass 12 HindiPrevious Year Question PapersClass 12 Maths Question PapersClass 12 Physics Question PapersClass 12 Chemistry Question PapersClass 12 Biology Question PapersClass 12 English Core Question PapersClass 12 English Elective Question PapersClass 12 Hindi Core Question PapersClass 12 Hindi Elective Question PapersClass 12 Computer Science Question PapersClass 12 Business Studies Question PapersClass 12 Accountancy Question PapersClass 12 Physical Education Question PapersCBSE Class 12 Economics Question PapersClass 12 Entrepreneurship Question PapersExam InfoDate SheetMarking SchemeResultSyllabusMaths SyllabusPhysics SyllabusChemistry SyllabusBiology SyllabusEnglish SyllabusHindi SyllabusAccountancy SyllabusBusiness Studies SyllabusEconomics SyllabusPolitical Science SyllabusPhysical Education SyllabusTextbook SolutionsClass 12 NCERT Exemplar SolutionsClass 12 HC Verma SolutionsClass 12 RD Sharma SolutionsClass 12 RS Aggarwal SolutionsClass 12 DK Goel SolutionsClass 12 TS Grewal SolutionsClass 12 Sandeep Garg SolutionsAnswerVerified461.4k+ viewsHint: The N-H bond is strong due to the high electronegativity of N atoms and so a large amount of energy is required to break the bond (approximately 386 kJ/mol). Now try all the options and see which one is correct.Complete step by step answer:-In$N{H_2}N{H_2}$, since both the nitrogen atoms have the same value of electronegativity the bond between the 2 nitrogen atoms (N-N) will be non-polar. This contradicts option (A), so option (A) is false.-In $N{H_3}$, out of the 5 electrons from the outermost shell of N, 3 have bonded with 1 Hydrogen atom each. Hence leaving behind a lone pair of electrons.In $N{H_2} - N{H_2}$, for each nitrogen atom having 5 outer shell electrons, 2 are bonded with 1 hydrogen each and with one electron they bond with an electron from the other nitrogen. Hence each of the nitrogen is left with a lone pair of electrons.In${N_2}$, the 2 N atoms are bonded to each other by a triple bond and so leaving behind a lone pair of electrons each. Hence we now know that all three of them have lone pairs of electrons. This conclusion contradicts option (B), so we can say that option (B) is false.-In $N{H_2}N{H_2}$: to calculate the oxidation state (O.s.) of N atoms let us assume it to be ‘x’ and the oxidation state of H is already equal to 1. So: O.s. of 2 N + O.s. of 4 H = O.s. of entire molecule (Total oxidation state of the molecule is 0 because the molecule is electrically neutral 2x + 4 = 0 and so x = -2Hence the oxidation state of each nitrogen here is (-2). This contradicts option (C), so option (C) is also false.-The reaction of nitrogen with hydrogen has a high activation rate due to the high bond energy between them (which was due to high electronegativity of N).Hence, the correct option is: (D).Note:Nitrogen reacts with hydrogen only under high temperature and pressure, that too in the presence of a metal catalyst to overcome the high activation energy. It is a type of combination reaction and produces ammonia. This process is also known as Haber’s process.Recently Updated PagesWho among the following was the religious guru of class 7 social science CBSEwhat is the correct chronological order of the following class 10 social science CBSEWhich of the following was not the actual cause for class 10 social science CBSEWhich of the following statements is not correct A class 10 social science CBSEWhich of the following leaders was not present in the class 10 social science CBSEGarampani Sanctuary is located at A Diphu Assam B Gangtok class 10 social science CBSEWho among the following was the religious guru of class 7 social science CBSEwhat is the correct chronological order of the following class 10 social science CBSEWhich of the following was not the actual cause for class 10 social science CBSEWhich of the following statements is not correct A class 10 social science CBSEWhich of the following leaders was not present in the class 10 social science CBSEGarampani Sanctuary is located at A Diphu Assam B Gangtok class 10 social science CBSE

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