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JEE Mains 2020 - 30 Days Revision | Chemical Bonding Part 1 - Most Important Questions | Chemistry

JEE Mains 2020 - 30 Days Revision | Chemical Bonding Part 2 - Most Important Questions | Chemistry

Read the passage given below and answer the following questions : The existence of coordination compounds with the same formula but different arragements of the ligands was crucial in the development of coordination chemistry. Two or more compounds with the same formula but different arrangements of the atoms are called isomers. Isomers are compounds with the same molecular formula but different structural formulas and do not necessarily share similar properties. There are many different classes of isomers, like stereoisomers, enantiomers, and geometrical isomers. There are two main forms of isomerism: structural isomerism and stereoisomerism. The different chemical formulas in structural isomers are caused either by a difference in what ligands are bonded to the central atoms or how the individual ligands are bonded to the central atoms. The following questions are multiple choice questions. Choose the most appropriate answer: Due to the presence of ambidentate ligands coordination compounds show isomerism. Palladium complexes of the type [Pd(C_(6)H_(5))_(2)(SCN)_(2)] and [Pd(C_(6)H_(5))_(2)(NCS)_(2)] are

Read the passage given below and answer the following questions : The existence of coordination compounds with the same formula but different arragements of the ligands was crucial in the development of coordination chemistry. Two or more compounds with the same formula but different arrangements of the atoms are called isomers. Isomers are compounds with the same molecular formula but different structural formulas and do not necessarily share similar properties. There are many different classes of isomers, like stereoisomers, enantiomers, and geometrical isomers. There are two main forms of isomerism: structural isomerism and stereoisomerism. The different chemical formulas in structural isomers are caused either by a difference in what ligands are bonded to the central atoms or how the individual ligands are bonded to the central atoms. The following questions are multiple choice questions. Choose the most appropriate answer: What kind of isomerism exists between [Cr(H_(2)O)_(6)] Cl_(3) (violet) and [Cr(H_(2)O)_(5)Cl]Cl_(2).H_(2)O (greyishgreen) ?

Read the passage given below and answer the following questions : The existence of coordination compounds with the same formula but different arragements of the ligands was crucial in the development of coordination chemistry. Two or more compounds with the same formula but different arrangements of the atoms are called isomers. Isomers are compounds with the same molecular formula but different structural formulas and do not necessarily share similar properties. There are many different classes of isomers, like stereoisomers, enantiomers, and geometrical isomers. There are two main forms of isomerism: structural isomerism and stereoisomerism. The different chemical formulas in structural isomers are caused either by a difference in what ligands are bonded to the central atoms or how the individual ligands are bonded to the central atoms. The following questions are multiple choice questions. Choose the most appropriate answer: Which of the following complexes show linkage isomerism ?

Organic Chemistry: Some Basic Principles & Techniques - Electronic Effect|Electron Movement In Organic Chemical Reaction|Electron Displacement Effect In Covalent Bond|Inductive Effect|Resonance Effect|OMR|Summary

12:30 PM JEE Mains 2020 - Chemistry | Chemical Bonding - 30 Days Score Booster Course

Read the passage given below and answer the question: The transition metals when exposed to oxygen at low and intermediate temperatures form thin, protective oxide films of up to some thousands of Angstroms in thickness. Transition metal oxides lie between the extremes of ionic and covalent binary compounds formed by elements from the left or right side of the periodic table. They range from metallic to semiconducting and deviate by both large and small degrees from stoichiometry. Since d- electron bonding levels are involved, the cations exist in various valence states and hence give rise to a large number of oxides. The crystal structures are often classified by considering a cubic or hexagonal close-packed lattice of one set of ions with the other set of ions filling the octahedral or tetrahedral interstices. The actual oxide structures, however, generally show departures from such regular arrays due in part to distortions caused by packing of ions of different size and to ligand field effects. These distortions depend not only on the number of d-electrons but also on the valence and the position of the transition metal in a period or group. (source: Smeltzer, W. W., & Young, D. J. (1975). Oxidation properties of transition metals. Progress in Solid State Chemistry, 10, 17-54.) In the following question, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the choices on the basis of the above passage. Assertion : Transition metals form protective oxide films. Reason: Oxides of transition metals are always stoichiometric.