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MCQOPTIONS
This section includes 1187 Mcqs, each offering curated multiple-choice questions to sharpen your NEET knowledge and support exam preparation. Choose a topic below to get started.
| 501. |
The d-electron configurations of \[C{{r}^{2+}},M{{n}^{2+}},F{{e}^{2+}}\] and \[C{{o}^{2+}}\] are \[{{d}^{4}},{{d}^{5}},{{d}^{6}}\] and \[{{d}^{7}}\] respectively. Which one of the following will exhibit the lowest paramagnetic behaviour? (Atomic no.\[Cr=24,Mn=25,Fe=26,Co=27\]). |
| A. | \[{{[Co{{({{H}_{2}}O)}_{6}}]}^{2+}}\] |
| B. | \[{{[Cr{{({{H}_{2}}O)}_{6}}]}^{2+}}\] |
| C. | \[{{[Mn{{({{H}_{2}}O)}_{6}}]}^{2+}}\] |
| D. | \[{{[Fe{{({{H}_{2}}O)}_{6}}]}^{2+}}\] |
| Answer» B. \[{{[Cr{{({{H}_{2}}O)}_{6}}]}^{2+}}\] | |
| 502. |
For octahedral complex, which of the following \[{{d}^{n}}\] configurations of metal cation cannot exist in high spin and low spin forms? |
| A. | \[{{d}^{3}}\] and \[{{d}^{8}}\] |
| B. | \[{{d}^{3}}\] and \[{{d}^{5}}\] |
| C. | \[{{d}^{3}}\] and \[{{d}^{6}}\] |
| D. | \[{{d}^{4}}\] and \[{{d}^{8}}\] |
| Answer» B. \[{{d}^{3}}\] and \[{{d}^{5}}\] | |
| 503. |
An aqueous solution of titanium chloride, when subjected to magnetic measurement, measured zero magnetic moment. Assuming the octahedral complex in aqueous solution, the formulae of the complex is: |
| A. | \[\left[ Ti{{\left( {{H}_{2}}O \right)}_{6}} \right]C{{l}_{2}}\] |
| B. | \[\left[ Ti{{\left( {{H}_{2}}O \right)}_{6}} \right]C{{l}_{4}}\] |
| C. | \[\left[ TiC{{l}_{3}}{{\left( {{H}_{2}}O \right)}_{3}} \right]\] |
| D. | \[\left[ TiC{{l}_{2}}{{\left( {{H}_{2}}O \right)}_{4}} \right]\] |
| Answer» C. \[\left[ TiC{{l}_{3}}{{\left( {{H}_{2}}O \right)}_{3}} \right]\] | |
| 504. |
Which of the following complex compound (s) is/are paramagnetic and low spin?(I) \[{{K}_{3}}\left[ Fe\left( C{{N}_{6}} \right) \right]\] (II) \[{{\left[ Ni{{\left( CO \right)}_{4}} \right]}^{10}}\](III) \[{{\left[ Cr{{(N{{H}_{3}})}_{6}} \right]}^{3+}}\] (IV) \[{{\left[ Mn\,(C{{N}_{6}}) \right]}^{4\,-}}\]Choose the correct code: |
| A. | I only |
| B. | II and III |
| C. | I and IV |
| D. | IV only |
| Answer» D. IV only | |
| 505. |
In which of the following complex hybridization of central metal is not same as that of donor atom of ligand |
| A. | \[\left[ Ni{{\left( P{{F}_{3}} \right)}_{4}} \right]\] |
| B. | \[\left[ Fe{{\left( dmg \right)}_{2}} \right]\] |
| C. | \[{{[Zn\,{{(en)}_{2}}]}^{2+}}\] |
| D. | \[{{\left[ Ni{{\left( PM{{e}_{3}} \right)}_{4}} \right]}^{2+}}\] |
| Answer» C. \[{{[Zn\,{{(en)}_{2}}]}^{2+}}\] | |
| 506. |
In which complex, \[{{d}_{z}}2\] orbital of inner shell is not used in the hybridization of central metal cation |
| A. | \[Fe{{\left( CO \right)}_{5}}\] |
| B. | \[{{[Cu{{(N{{H}_{3}})}_{5}}]}^{2+}}\] |
| C. | \[{{[Co{{(N{{H}_{3}})}_{6}}]}^{2+}}\] |
| D. | \[{{[Ir{{F}_{6}}]}^{3-}}\] |
| Answer» C. \[{{[Co{{(N{{H}_{3}})}_{6}}]}^{2+}}\] | |
| 507. |
The pair in which both species have same magnetic moment (spin only value) is |
| A. | \[{{[Cr{{({{H}_{2}}O)}_{6}}]}^{2+}},{{[CoC{{l}_{4}}]}^{2-}}\] |
| B. | \[{{[Cr{{({{H}_{2}}O)}_{6}}]}^{2+}},{{[Fe{{({{H}_{2}}O)}_{6}}]}^{2+}}\] |
| C. | \[{{[Mn{{({{H}_{2}}O)}_{6}}]}^{2+}},{{[Cr{{({{H}_{2}}O)}_{6}}]}^{2+}}\] |
| D. | \[{{[CoC{{l}_{4}}]}^{2-}},{{[Fe{{({{H}_{2}}O)}_{6}}]}^{2+}}\] |
| Answer» C. \[{{[Mn{{({{H}_{2}}O)}_{6}}]}^{2+}},{{[Cr{{({{H}_{2}}O)}_{6}}]}^{2+}}\] | |
| 508. |
Which of the following order of stability of complex ion is Incorrect? |
| A. | \[{{[Fe{{({{C}_{2}}{{O}_{4}})}_{3}}]}^{3-}}<{{[Fe{{({{H}_{2}}O)}_{6}}]}^{3+}}\] |
| B. | \[{{[Fe(edta)]}^{-}}>{{[Fe{{(en)}_{3}}]}^{3+}}\] |
| C. | \[{{\left[ Ni{{\left( en \right)}_{2}} \right]}^{2+}}>\left[ Ni{{\left( dmg \right)}_{2}} \right]\] |
| D. | \[{{\left[ Fe{{\left( CN \right)}_{6}} \right]}^{3-}}>{{\left[ Fe{{\left( CN \right)}_{6}} \right]}^{4-}}\] |
| Answer» D. \[{{\left[ Fe{{\left( CN \right)}_{6}} \right]}^{3-}}>{{\left[ Fe{{\left( CN \right)}_{6}} \right]}^{4-}}\] | |
| 509. |
The diamagnetic species is: (I)\[{{\left[ Cu{{\left( CN \right)}_{4}} \right]}^{3-}}\] (II) \[{{\left[ Co{{\left( N{{H}_{3}} \right)}_{6}} \right]}^{3+}}\] (III) \[{{\left[ Ni{{\left( N{{H}_{3}} \right)}_{6}} \right]}^{2+}}\] (IV) \[{{\left[ Fe{{\left( CN \right)}_{6}} \right]}^{3-}}\] |
| A. | I, III |
| B. | I, II |
| C. | III, IV |
| D. | only IV |
| Answer» C. III, IV | |
| 510. |
Coordination number of Cr is six. A complex with\[{{C}_{2}}O_{4}^{2-}\], en and superoxide \[O_{2}^{-}\] will be in the ratio to make complex \[{{[Cr{{({{C}_{2}}{{O}_{4}})}_{x}},{{(en)}_{y}}{{({{O}_{2}})}_{z}}]}^{-}}\] |
| A. | x-1 y-1 z-1 |
| B. | x-1 y-1 z-2 |
| C. | x-1 y-2 z-2 |
| D. | x-2 y-1 z-1 |
| Answer» E. | |
| 511. |
\[[Co{{(N{{H}_{3}})}_{4}}{{(N{{O}_{2}})}_{2}}]Cl\] exhibits |
| A. | linkage isomerism, ionization isomerism and geometrical isomerism |
| B. | ionization isomerism, geometrical isomerism and optical isomerism |
| C. | linkage isomerism, geometrical isomerism and optical isomerism |
| D. | linkage isomerism, ionization isomerism and optical isomerism |
| Answer» B. ionization isomerism, geometrical isomerism and optical isomerism | |
| 512. |
\[M{{n}^{2+}}\] forms a complex with \[B{{r}^{-}}\] ion. The magnetic moment of the complex is 5.92 B.M. What would be the probable formula and geometry of the complex? |
| A. | \[{{[MnB{{r}_{6}}]}^{4-}}\], octahedral |
| B. | \[{{[MnB{{r}_{4}}]}^{2-}}\], square planar |
| C. | \[{{[MnB{{r}_{4}}]}^{2-}}\], tetrahedral |
| D. | \[{{[MnB{{r}_{5}}]}^{3-}}\], trigonal bipyramidal |
| Answer» D. \[{{[MnB{{r}_{5}}]}^{3-}}\], trigonal bipyramidal | |
| 513. |
The number of geometrical isomers for octahedral \[{{\left[ Co{{\left( N{{H}_{3}} \right)}_{2}}C{{l}_{4}} \right]}^{-}}\], square planar \[AuC{{l}_{2}}Br_{2}^{-}\] and \[{{[Co(N{{O}_{2}}){{(N{{H}_{3}})}_{5}}]}^{2+}}\] are |
| A. | 2, 2, 2 |
| B. | 2, 2, no isomerism |
| C. | 3, 2, 2 |
| D. | 2, 3, no isomerism |
| Answer» C. 3, 2, 2 | |
| 514. |
What is the magnetic moment (spin only) and hybridisation of the brown ring complex \[\left[ Fe{{\left( {{H}_{2}}O \right)}_{5}}NO \right]S{{O}_{4}}\]? |
| A. | \[\sqrt{3}BM,s{{p}^{3}}{{d}^{2}}\] |
| B. | \[\sqrt{3}BM,{{d}^{2}}s{{p}^{3}}\] |
| C. | \[\sqrt{15}BM,s{{p}^{3}}{{d}^{2}}\] |
| D. | \[\sqrt{15}BM,{{d}^{2}}s{{p}^{3}}\] |
| Answer» D. \[\sqrt{15}BM,{{d}^{2}}s{{p}^{3}}\] | |
| 515. |
\[AgCl\] is soluble in \[N{{H}_{4}}OH\] solution. The solubility is due to formation of |
| A. | \[AgOH\] |
| B. | \[A{{g}_{2}}O\] |
| C. | \[{{[Ag{{(N{{H}_{3}})}_{2}}]}^{+}}\] |
| D. | \[N{{H}_{4}}Cl\] |
| Answer» D. \[N{{H}_{4}}Cl\] | |
| 516. |
An antibiotic with a broad spectrum |
| A. | kills the antibodies |
| B. | acts on a specific antigen |
| C. | acts on different antigens |
| D. | acts on both the antigens and antibodies |
| Answer» D. acts on both the antigens and antibodies | |
| 517. |
Various phenol derivatives, tincture of iodine (\[2-3\]%)\[{{I}_{2}}\] in (water / alcohol) and some dyes like methylene blue are |
| A. | antiseptics |
| B. | disinfectants |
| C. | analgesics |
| D. | antipyretics |
| Answer» B. disinfectants | |
| 518. |
Chloroamphenicol is an: |
| A. | antifertilitydrug |
| B. | antihistaminic |
| C. | antiseptic and disinfectant |
| D. | antibiotic-broad spectrum |
| Answer» E. | |
| 519. |
Sulphonamides act as |
| A. | Antiseptic |
| B. | Analgesic |
| C. | Antimicrobials |
| D. | Antipyretic |
| Answer» D. Antipyretic | |
| 520. |
Chemically heroin is |
| A. | morphine monoacetate |
| B. | morphine dibenzoate |
| C. | morphine diacetate |
| D. | morphine monobenzoate |
| Answer» D. morphine monobenzoate | |
| 521. |
Which of the following statements about aspirin is not true? |
| A. | It is effective in relieving pain. |
| B. | It is a neurologically active drug. |
| C. | It has antiblood clotting action. |
| D. | It belongs to narcotic analgesics. |
| Answer» E. | |
| 522. |
Which one of the following compounds is an anti-fertility drug? |
| A. | Aspirin |
| B. | Chloromycetin |
| C. | Saheli |
| D. | Penicillin |
| Answer» D. Penicillin | |
| 523. |
Benzalkonium chloride is a |
| A. | cationic surfactant and antiseptic |
| B. | anionic surfactant and soluble in most of organic solvents |
| C. | cationic surfactant and insoluble in most of organic solvents |
| D. | cationic surfactant and antimalarial |
| Answer» B. anionic surfactant and soluble in most of organic solvents | |
| 524. |
Which one of the following is employed as antihistamine? |
| A. | Chloramphenicol |
| B. | Diphenylhydramine |
| C. | Norothindrone |
| D. | Omeprazole |
| Answer» C. Norothindrone | |
| 525. |
Which is correct about saccharin? |
| A. | It is |
| B. | It is 600 times sweeter than sugar |
| C. | It is used as sweetening agent |
| D. | All of these |
| Answer» E. | |
| 526. |
Which is correct about vanillin? |
| A. | A flavouring agent having vanila flavor |
| B. | p-hydroxy-m-ethoxy benzaldehyde |
| C. | A food additive |
| D. | All of these |
| Answer» E. | |
| 527. |
Aspirin can be prepared by the reaction of |
| A. | Salicyldehyde with acetic anhydride in presence of \[{{H}_{2}}S{{O}_{4}}\] |
| B. | Salicylic acid with methanol in presence of \[{{H}_{2}}S{{O}_{4}}\] |
| C. | Salicylic acid with acetic anhydride in presence of \[{{H}_{2}}S{{O}_{4}}\] |
| D. | Cinnamic acid with acetic anhydride in presence of \[{{H}_{2}}S{{O}_{4}}\] |
| Answer» D. Cinnamic acid with acetic anhydride in presence of \[{{H}_{2}}S{{O}_{4}}\] | |
| 528. |
Which one of the following is used as Antihistamine? |
| A. | Omeprazole |
| B. | Chloranphenicol |
| C. | Diphenhydramine |
| D. | Norethindrone |
| Answer» D. Norethindrone | |
| 529. |
End of detergents have |
| A. | ester group |
| B. | sodium sulphate |
| C. | aldehyde |
| D. | amine group |
| Answer» C. aldehyde | |
| 530. |
Structuraly biodegradable detergents, should contain |
| A. | normal alkyl chain |
| B. | branched alkyl chain |
| C. | phenyl side chain |
| D. | cyclohexyl side chain |
| Answer» C. phenyl side chain | |
| 531. |
Which artificial sweetener contains chlorine? |
| A. | Sucralose |
| B. | Alitame |
| C. | Aspartame |
| D. | Saccharin |
| Answer» B. Alitame | |
| 532. |
Which of the following is an antidiabetic drug? |
| A. | Insulin |
| B. | Penicillin |
| C. | Chloroquine |
| D. | Aspirin |
| Answer» B. Penicillin | |
| 533. |
When salicylic acid is treated with acetic anhydride we get |
| A. | aspirin |
| B. | paracetamol |
| C. | salol |
| D. | none of these |
| Answer» B. paracetamol | |
| 534. |
Omeoprazole and lansoprazole are used as - |
| A. | antifertility |
| B. | antiallergic |
| C. | antibiotic |
| D. | antacid |
| Answer» E. | |
| 535. |
The drug used for prevention of heart attacks is |
| A. | aspirin |
| B. | valium |
| C. | chloramphenicol |
| D. | cephalosporin |
| Answer» B. valium | |
| 536. |
Which of the following is used as an antibiotic? |
| A. | ciprofloxacin |
| B. | paracetamol |
| C. | ibuprofen |
| D. | tocopherol |
| Answer» B. paracetamol | |
| 537. |
Which of these is a hypnotic? |
| A. | metaldehyde |
| B. | acetaldehyde |
| C. | paraldehyde |
| D. | None of these |
| Answer» D. None of these | |
| 538. |
Amoxycillin is semi-synthetic modification of |
| A. | penicillin |
| B. | streptomycin |
| C. | tetracyclin |
| D. | chloroampheniol |
| Answer» B. streptomycin | |
| 539. |
The following compound is used as |
| A. | an anti-inflammatory compound |
| B. | analgesic |
| C. | hypnotic |
| D. | antiseptic |
| Answer» C. hypnotic | |
| 540. |
The insecticide containing 99%\[\gamma \] - isomer of benzene hexachloride is known as |
| A. | lindane |
| B. | TNT |
| C. | malathion |
| D. | methoxychlor |
| Answer» B. TNT | |
| 541. |
Which of the following term means pain killer? |
| A. | Antibiotic |
| B. | Analgesic |
| C. | Antipyretic |
| D. | Penicillin |
| Answer» C. Antipyretic | |
| 542. |
An antipyretic is |
| A. | quinine |
| B. | paracetamol |
| C. | luminal |
| D. | piperazine |
| Answer» C. luminal | |
| 543. |
Antiseptics and disinfectants either kill or prevent growth of microorganisms. Identify which of the following statements is not true: |
| A. | Chlorine and iodine are used as strong disinfectants. |
| B. | Dilute solutions of boric acid and hydrogen Peroxide are strong antiseptics. |
| C. | Disinfectants harm the living tissues. |
| D. | A 0.2% solution of phenol is an antiseptic while 1% solution acts as a disinfectant. |
| Answer» C. Disinfectants harm the living tissues. | |
| 544. |
Match the chemicals in Column I with their uses in Column II.Column IColumn II[A] Sodium perborate(I) Disinfectant[B] Chlorine(II) Antiseptic[C] Bithional(III) Milk bleaching agent[D] Potassium stearate(IV) Soap |
| A. | A-I, B-II, C-III, D-IV |
| B. | A-II, B-III, C-IV, D-I |
| C. | A-III, B-I, C-II, D-IV |
| D. | A-IV, B-I, C-II, D-III |
| Answer» D. A-IV, B-I, C-II, D-III | |
| 545. |
Which one of the following can possibly be used as analgesic without causing addiction and mood modification? |
| A. | Diazepam |
| B. | Morphine |
| C. | N-acetyl-para-aminophenol |
| D. | Tetrahydrocannabinol |
| Answer» D. Tetrahydrocannabinol | |
| 546. |
The structure given below is known as |
| A. | Penicillin F |
| B. | Penicillin G |
| C. | Penicillin K |
| D. | Ampicillin |
| Answer» C. Penicillin K | |
| 547. |
Which of the following acts as an antioxidant in edible oils? |
| A. | Vitamin B |
| B. | Vitamin C |
| C. | Vitamin D |
| D. | Vitamin E |
| Answer» E. | |
| 548. |
An ester used as medicine is |
| A. | ethyl acetate |
| B. | methyl acetate |
| C. | methyl salicylate |
| D. | ethyl benzoate |
| Answer» D. ethyl benzoate | |
| 549. |
Terfenadine is commonly used as a/an |
| A. | tranquilizer |
| B. | antihistamine |
| C. | antimicrobial |
| D. | antibiotic |
| Answer» C. antimicrobial | |
| 550. |
\[{{t}_{1/4}}\] can be taken as the time taken for the concentration of a reactant to drop to \[\frac{3}{4}\] of its initial value. If the rate constant for a first order reaction is k, the \[{{t}_{1/4}}\] can be written as |
| A. | \[0.75/k\] |
| B. | \[0.69/k\] |
| C. | \[0.29/k\] |
| D. | \[0.10/k\] |
| Answer» D. \[0.10/k\] | |