MCQOPTIONS
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MCQOPTIONS
This section includes 25 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In the process of extraction of gold, Roasted gold ore\[+C{{N}^{-}}+{{H}_{2}}O\xrightarrow{{{O}_{2}}}[X]+O{{H}^{-}}\] \[[X]+Zn\to [Y]+Au\] Identify the complexes [X] and [Y] [IIT-JEE 2003] |
| A. | \[X={{[Au{{(CN)}_{2}}]}^{-}},\,Y={{[Zn{{(CN)}_{4}}]}^{2-}}\] |
| B. | \[X={{[Au{{(CN)}_{4}}]}^{3-}},\,Y={{[Zn{{(CN)}_{4}}]}^{2-}}\] |
| C. | \[X={{[Au{{(CN)}_{2}}]}^{-}},\,Y=Zn{{(CN)}_{6}}{{]}^{4-}}\] |
| D. | \[X={{[Au{{(CN)}_{4}}]}^{-}},\,Y={{[Zn{{(CN)}_{4}}]}^{2-}}\] |
| Answer» B. \[X={{[Au{{(CN)}_{4}}]}^{3-}},\,Y={{[Zn{{(CN)}_{4}}]}^{2-}}\] | |
| 2. |
\[CuS{{O}_{4}}\] reacts with \[KCN\] solution and forms [MP PMT 1992; IIT 1996; UPSEAT 2001, 02] |
| A. | \[Cu{{(CN)}_{2}}\] |
| B. | \[Cu(CN)\] |
| C. | \[{{K}_{2}}\left[ Cu{{(CN)}_{4}} \right]\] |
| D. | \[{{K}_{3}}\left[ Cu{{\left( CN \right)}_{4}} \right]\] |
| Answer» E. | |
| 3. |
Which of the following represents a chelating ligand [JIPMER 2002] |
| A. | \[{{H}_{2}}O\] |
| B. | \[O{{H}^{-}}\] |
| C. | \[DMG\] |
| D. | \[C{{l}^{-}}\] |
| Answer» D. \[C{{l}^{-}}\] | |
| 4. |
In \[\left[ Ni{{\left( N{{H}_{3}} \right)}_{4}} \right]S{{O}_{4}},\] the valency and coordination number of \[Ni\] will be respectively |
| A. | 3 and 6 |
| B. | 2 and 4 |
| C. | 4 and 2 |
| D. | 4 and 4 |
| Answer» C. 4 and 2 | |
| 5. |
Which of the following organometallic compound is \[\sigma \] and \[\pi \] bonded [MH CET 2001; PCET 2002] |
| A. | \[Fe{{(C{{H}_{3}})}_{3}}\] |
| B. | \[[Fe{{({{\eta }^{5}}-{{C}_{5}}{{H}_{5}})}_{2}}]\] |
| C. | \[{{[Co{{(CO)}_{5}}N{{H}_{3}}]}^{2+}}\] |
| D. | \[K[PtC{{l}_{3}}({{n}^{2}}-{{C}_{2}}{{H}_{4}})]\] |
| Answer» C. \[{{[Co{{(CO)}_{5}}N{{H}_{3}}]}^{2+}}\] | |
| 6. |
Mixture \[X=0.02\,mol\] of \[[Co{{(N{{H}_{3}})}_{5}}S{{O}_{4}}]\,Br\] and 0.02 mol of \[[Co{{(N{{H}_{3}})}_{5}}Br]S{{O}_{4}}\] was prepared in 2 litre of solution 1 litre of mixture X + excess \[AgN{{O}_{3}}\to Y\]. 1 litre of mixture X + excess \[BaC{{l}_{2}}\to Z\] Number of moles of Y and Z are [IIT JEE 2003] |
| A. | 0.01, 0.01 |
| B. | 0.02, 0.01 |
| C. | 0.01, 0.02 |
| D. | 0.02, 0.02 |
| Answer» B. 0.02, 0.01 | |
| 7. |
Which of the following compounds shows optical isomerism [AIEEE 2005; CBSE PMT 2005] |
| A. | \[{{[Cu{{(N{{H}_{3}})}_{4}}]}^{2+}}\] |
| B. | \[{{[ZnC{{l}_{4}}]}^{2-}}\] |
| C. | \[{{[Cr{{({{C}_{2}}{{O}_{4}})}_{3}}]}^{3-}}\] |
| D. | \[{{[Co{{(CN)}_{6}}]}^{3-}}\] |
| Answer» D. \[{{[Co{{(CN)}_{6}}]}^{3-}}\] | |
| 8. |
In which of the following pairs both the complexes show optical isomerism [AIIMS 2005] |
| A. | cis-\[{{[Cr{{({{C}_{2}}{{O}_{4}})}_{2}}C{{l}_{2}}]}^{3-}}\], cis-\[[Co{{(N{{H}_{3}})}_{4}}C{{l}_{2}}]\] |
| B. | \[[Co{{(en)}_{3}}]C{{l}_{3}}\], cis-\[[Co{{(en)}_{2}}C{{l}_{2}}]Cl\] |
| C. | \[[PtCl(dien)]Cl\], \[{{[NiC{{l}_{2}}B{{r}_{2}}]}^{2-}}\] |
| D. | \[[Co{{(N{{O}_{3}})}_{3}}{{(N{{H}_{3}})}_{3}}]\], cis-\[[Pt{{(en)}_{2}}C{{l}_{2}}]\] |
| Answer» C. \[[PtCl(dien)]Cl\], \[{{[NiC{{l}_{2}}B{{r}_{2}}]}^{2-}}\] | |
| 9. |
Which one of the following is expected to exhibit optical isomerism (en = ethylenediamine) |
| A. | cis - \[[Pt{{(N{{H}_{3}})}_{2}}C{{l}_{2}}]\] |
| B. | trans - \[[Co{{(en)}_{2}}C{{l}_{2}}]\] |
| C. | trans - \[[Pt{{(N{{H}_{3}})}_{2}}C{{l}_{2}}]\] |
| D. | cis - \[[Co{{(en)}_{2}}C{{l}_{2}}]\] |
| Answer» E. | |
| 10. |
Which kind of isomerism is exhibited by octahedral \[Co{{(N{{H}_{3}})}_{4}}B{{r}_{2}}Cl\] ? [IIT-JEE Screening 2005] |
| A. | Geometrical and Ionization |
| B. | Geometrical and Optical |
| C. | Optical and Ionization |
| D. | Geometrical only |
| Answer» B. Geometrical and Optical | |
| 11. |
Which one of the following has largest number of isomers? [AIEEE 2004] |
| A. | \[{{[Ir{{(P{{P}_{3}})}_{2}}H(CO)]}^{2+}}\] |
| B. | \[{{[Co{{(N{{H}_{3}})}_{5}}Cl]}^{2+}}\] |
| C. | \[{{[Ru{{(N{{H}_{3}})}_{4}}C{{l}_{2}}]}^{+}}\] |
| D. | \[{{[Co{{(en)}_{2}}C{{l}_{2}}]}^{+}}\] (R = alkyl group; en = ethylenediamine) |
| Answer» E. | |
| 12. |
Complex salt can be made by the combination of \[{{[C{{o}^{III}}{{(N{{H}_{3}})}_{5}}Cl]}^{X}}\] with [RPMT 2000, AFMC 2002] |
| A. | \[PO_{4}^{3-}\] |
| B. | \[C{{l}^{-}}\] |
| C. | \[2C{{l}^{-}}\] |
| D. | \[2{{K}^{+}}\] |
| Answer» D. \[2{{K}^{+}}\] | |
| 13. |
Dimethyl glyoxime forms a coloured complex with |
| A. | \[Ag\] |
| B. | \[Ni\] |
| C. | \[Cr\] |
| D. | \[Zn\] |
| Answer» C. \[Cr\] | |
| 14. |
Which of the following complexes has the highest stability constant at 298 K |
| A. | \[{{\left[ CdC{{l}_{4}} \right]}^{2-}}\] |
| B. | \[{{\left[ CdB{{r}_{4}} \right]}^{2-}}\] |
| C. | \[{{\left[ Cd{{I}_{4}} \right]}^{2-}}\] |
| D. | \[{{\left[ Cd{{\left( CN \right)}_{4}} \right]}^{2-}}\] |
| Answer» E. | |
| 15. |
Carnallite in solution in \[{{H}_{2}}O\], shows the properties of [DCE 2003] |
| A. | \[{{K}^{+}},M{{g}^{2+}},C{{l}^{-}}\] |
| B. | \[{{K}^{+}},C{{l}^{-}},SO_{4}^{2-},B{{r}^{-}}\] |
| C. | \[{{K}^{+}},M{{g}^{2+}},CO_{3}^{2-}\] |
| D. | \[{{K}^{+}},M{{g}^{2+}},C{{l}^{-}},B{{r}^{-}}\] |
| Answer» B. \[{{K}^{+}},C{{l}^{-}},SO_{4}^{2-},B{{r}^{-}}\] | |
| 16. |
Which of the following is not considered as an organometallic compound. [AIIMS 2004] |
| A. | Cis-platia |
| B. | Ferrocene |
| C. | Zeise's salt |
| D. | Gringard reagent |
| Answer» B. Ferrocene | |
| 17. |
Finely divided iron combines with CO to give [UPSEAT 2002] |
| A. | \[Fe{{(CO)}_{5}}\] |
| B. | \[F{{e}_{2}}{{(CO)}_{9}}\] |
| C. | \[F{{e}_{2}}{{(CO)}_{12}}\] |
| D. | \[Fe{{(CO)}_{6}}\] |
| Answer» B. \[F{{e}_{2}}{{(CO)}_{9}}\] | |
| 18. |
The co-ordination number of cobalt in the complex \[[Co{{(en)}_{2}}B{{r}_{2}}]C{{l}_{2}}\] is |
| A. | 2 |
| B. | 6 |
| C. | 5 |
| D. | 4 |
| Answer» C. 5 | |
| 19. |
Which of the following is the odd one out [MP PET 1996] |
| A. | Potassium ferrocyanide |
| B. | Ferrous ammonium sulphate |
| C. | Potassium ferricyanide |
| D. | Tetrammine copper (II) sulphate |
| Answer» C. Potassium ferricyanide | |
| 20. |
Wilkinson's catalyst used as a homogeneous catalyst in the hydrogenation of alkenes contains |
| A. | Iron |
| B. | Aluminium |
| C. | Rhodium |
| D. | Cobalt |
| Answer» D. Cobalt | |
| 21. |
The coordination number of a central metal atom in a complex is determined by [AIEEE 2004] |
| A. | The number of ligands around a metal ion bonded by sigma and pi-bonds both. |
| B. | The number around a metal ion bonded by pi-bonds |
| C. | The number of ligands around a metal ion bonded by sigma bonds |
| D. | The number of only anionic ligands bonded to the metal ion |
| Answer» D. The number of only anionic ligands bonded to the metal ion | |
| 22. |
The metal which does not form a polynuclear carbonyl is |
| A. | \[Mn\] |
| B. | \[Co\] |
| C. | \[Cr\] |
| D. | \[Fe\] |
| Answer» D. \[Fe\] | |
| 23. |
A group of atoms can function as a ligand only when [KCET 1989; DCE 1999; MP PMT 2000] |
| A. | It is a small molecule |
| B. | It has an unshared electron pair |
| C. | It is a negatively charged ion |
| D. | It is a positively charged ion |
| Answer» C. It is a negatively charged ion | |
| 24. |
Which one is not an organometallic compound [J & K CET 2005; Pb. CET 2003] |
| A. | \[RMgX\] |
| B. | \[{{C}_{2}}{{H}_{5}}ONa\] |
| C. | \[{{\left( C{{H}_{3}} \right)}_{4}}Sn\] |
| D. | \[K{{C}_{4}}{{H}_{9}}\] |
| Answer» C. \[{{\left( C{{H}_{3}} \right)}_{4}}Sn\] | |
| 25. |
Which of the following is not an organometallic compound [MP PET 1996; BHU 2002] |
| A. | Ethyl magnesium bromide |
| B. | Tetraethyl lead |
| C. | Sodium ethoxide |
| D. | Trimethyl aluminium |
| Answer» D. Trimethyl aluminium | |