Answer Q17, 18, 19 Showing detailled explanations. 14. Transition elementa exhibit variable 20. Vanadium has the olectron structore teoxidation states in their compounds becauzeA) they are all metalsB) the 3d and 4S electrons can easily beused in chenical combinationC) they funcltion vory well as catalysts inchenical reactions2p 3s p Sd4nWhicht one of the following suggosiedCormpounds of vanarfium is likely in exerA) Na VO,C) Na, VOB) (NH) VO,0) K VO,21. One of the isomers of CrC GH O dissolesin water forming a solution fromn which onlya third of the total chloride presentprecipitatod by AGNO, (a4) Which ong ofthe following represents the correct streturefor the complex chromium ion in theD) they have high successive lenisationenergies.15 What is the coordination number of iron inthe complex compound K.(Fe(CN), 1?8) 4A) 3C) 6D) 8aqueous solution?A) [CrCH O)C) (Cr (H,O),CL16. Potassium hexacyanoferrate (Ili)KIFE(CN), solu io contains iron in theoxidation state of +3 but no pracipitate ofFe(OH), is lormed on addition of aqueoussodium hydroxideThe reasons is:8) (CiCH,0)CPD) (Cr CiA) the cyano ligand is a stronger ligandthan the liydroxide ligandB) the ligand field splitting of the cyanoligand is higher than that of thehydroxide ligand.C) the anionic complex fomed in theaqueous solution repels theapproaching hydraxide ligandD) None of the above.22 Which one of the following provides the mostsatisfactory definition of a transition ouatalA) occurs in the d-block of the periodieB) has variable oxidation stste in itscompoundC) forms an lon with a parfially fillod dBubshellD) lies between scandium and zinc in theperiodic table23 Which one of the tollowing lons has thesmallest radius?17. What do you observe when aqueousammonia is added slowly to aqueous copperIl sulphate until the ammonia is present inA) CrC) NB) ND) TPexcess?A) pale blue solution turns deep blueB) pale green solution turns muddy greenC) pale brown solution turns muddy brownD) pale green solution turns deep blueQuestions 24-26The compound I (Co(NH,), Br SO, andI= [Co(NH), SOJ Br exhibit isomerism.18 What property of the transition metal isvanadium making use of in vanadiumpentoxide (V,O,) as it functions as a catalystin the contact process?A) paramagnetismB) empty d-orbitalC) variable oxidation stateD) none of the above24. What type of isomerism do they exhibit?A) structural, isomerismB) optical isomerismC) ionisation isomerismD) hydration isomerism25What anions will each yield in squeoussolution19. Why are scandium and Zinc consider as d-block elements but not as transitionalA)B)C)D)BrsoBrBrmetals?A they do not form coloured compoundsB) ihey are not paramagneticC) they do not form complexesD) they do not form ions or compoundswith partially filled d-orbitals.SOSOSOBr272

17. What is observed when aqueous ammonia is added to aqueous copper(II) sulphate until the ammonia…

17. What do you observe when aqueous ammonia is added slowly to aqueous copper Il sulphate until the ammonia is present in excess? A) pale blue solution turns deep blue B) pale groen solution turns muddy green C) pale brown solution tums muddy brown D) pale green solution turns deep blue 18 What property of the transition metal is vanadium making use of in vanadium pentoxide (V,O,) as it functions as a catalyst in the contact process? A) paramagnetism B) empty d-orbital C) variable oxidation stale D) none of the above 9. Why are scandium and Zinc consider as d- block elements but not as transitional metals? A they do not form coloured compounds B) ihey are not paramagnetic C) they do not form complexes D) they do not form ions or compounds with partially filled d-orbitals.

17. What do you observe when aqueous ammonia is added slowly to aqueous copper Il sulphate until the ammonia is present in excess? A) pale blue solution turns deep blue B) pale groen solution turns muddy green C) pale brown solution tums muddy brown D) pale green solution turns deep blue 18 What property of the transition metal is vanadium making use of in vanadium pentoxide (V,O,) as it functions as a catalyst in the contact process? A) paramagnetism B) empty d-orbital C) variable oxidation stale D) none of the above 9. Why are scandium and Zinc consider as d- block elements but not as transitional metals? A they do not form coloured compounds B) ihey are not paramagnetic C) they do not form complexes D) they do not form ions or compounds with partially filled d-orbitals.

Chemical Principles in the Laboratory

11th Edition

ISBN:9781305264434

Author:Emil Slowinski, Wayne C. Wolsey, Robert Rossi

Publisher:Emil Slowinski, Wayne C. Wolsey, Robert Rossi

Chapter38: Qualitative Analysis Of Group Iii Cations

Section: Chapter Questions

Problem 3ASA

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the spectrochemical series allows us to explain the variety ofcolors observed in transition metal complexes. But in practice, someone attempting to predictthe properties of compounds can occasionally be frustrated by various complicating factors.For instance, the nitrite ligand is presented as having a high field strength, but that is only whenit is the nitrogen of the nitrite that is coordinating to the metal center. Nitrite is also capable ofbinding to the metal center through an oxygen, and when this happens, nitrite is a low fieldstrength ligand. Furthermore, many metals initially precipitate as simple ionic salts before theyhave a chance to form more soluble complex ions. And occasionally, unexpected redoxreactions can lead to complex mixtures. The complex that copper forms with chloride ions is tetrahedral. Write the chemical formula for this complex. Thoroughly describe the energy diagram for the d orbitals.
the spectrochemical series allows us to explain the variety ofcolors observed in transition metal complexes. But in practice, someone attempting to predictthe properties of compounds can occasionally be frustrated by various complicating factors.For instance, the nitrite ligand is presented as having a high field strength, but that is only whenit is the nitrogen of the nitrite that is coordinating to the metal center. Nitrite is also capable ofbinding to the metal center through an oxygen, and when this happens, nitrite is a low fieldstrength ligand. Furthermore, many metals initially precipitate as simple ionic salts before theyhave a chance to form more soluble complex ions. And occasionally, unexpected redoxreactions can lead to complex mixtures. Despite these complications, the spectrochemical series remains a powerful predictivetool for inorganic chemists. New ligands are being developed all the time, and each new ligandneeds to be placed, at least approximately, on the…
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