MCQOPTIONS
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MCQOPTIONS
This section includes 1184 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 451. |
The number of lone pairs in XeOF4 is_________? |
| A. | O |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» C. 2 | |
| 452. |
The number of ions produced by [Pt(NH3)]Cl2? |
| A. | 4 |
| B. | 2 |
| C. | 3 |
| D. | 5 |
| Answer» D. 5 | |
| 453. |
The number of fundamental particles in an atom of the lightest isotope carbon are_______________? |
| A. | 6 |
| B. | 12 |
| C. | 18 |
| D. | 20 |
| Answer» D. 20 | |
| 454. |
The number of formula units in 29.25g of common salt_________________? |
| A. | 6.022 x 1023 |
| B. | 3.01 x 1023 |
| C. | 2 x NA |
| D. | 4 x 6.022 x 1023 |
| Answer» C. 2 x NA | |
| 455. |
The number of d-electrons in Fe2+ (Z = 26) is not equal to that of____________? |
| A. | p-electrons in Ne(Z = 10) |
| B. | s-electrons in Mg(Z = 12) |
| C. | d-electrons in Fe(Z = 26) |
| D. | p-electrons in CI(Z = 17) |
| Answer» E. | |
| 456. |
The number of atoms present in 21.6 gram of silver (atomic weight = 108) are same as the molecules in__________? |
| A. | 1.8 gram of H₂O |
| B. | 12 moles of KMnO₄ |
| C. | 0.6N H₂SO₄ |
| D. | 4.6 gram of C₂H₅OH |
| Answer» C. 0.6N H₂SO₄ | |
| 457. |
The number of atoms in a molecule determines________________? |
| A. | macromolecule |
| B. | macromolecule |
| C. | molecularity |
| D. | atomicity |
| Answer» E. | |
| 458. |
The number amino acid units for each turn of helix on average are____________________? |
| A. | 21 |
| B. | 23 |
| C. | 25 |
| D. | 27 |
| Answer» E. | |
| 459. |
The nucleus of an atom of every element will always contain____________________? |
| A. | neutrons |
| B. | protons and electrons |
| C. | protons |
| D. | protons and neutrons |
| Answer» D. protons and neutrons | |
| 460. |
The non-ideal behaviour results chiefly from________________? |
| A. | Intermolecular attraction and infinite volume |
| B. | Elastic collisions and finite volume |
| C. | Intermolecular attractions and finite volume |
| D. | Intermolecular attraction only |
| Answer» D. Intermolecular attraction only | |
| 461. |
The nitrogenous base different in RNA as compared to DNA is_________________? |
| A. | Cytosine |
| B. | Thymine |
| C. | Adenine |
| D. | Guanine |
| Answer» C. Adenine | |
| 462. |
The most reactive allotropic form of phosphorus is________________? |
| A. | White |
| B. | Redox potential |
| C. | Black |
| D. | Violet |
| Answer» B. Redox potential | |
| 463. |
The most powerful oxidizing agent among the halogens is__________________? |
| A. | F2 |
| B. | Cl2 |
| C. | Br2 |
| D. | I2 |
| Answer» B. Cl2 | |
| 464. |
The most paramagnetic element is____________________? |
| A. | Iron |
| B. | Cobalt |
| C. | Chromium |
| D. | Manganese |
| Answer» B. Cobalt | |
| 465. |
The most electronegative element among the following is_________________? |
| A. | Sb |
| B. | N |
| C. | As |
| D. | P |
| Answer» C. As | |
| 466. |
The most commonly used bleaching agent is_________? |
| A. | alcohol |
| B. | carbon dioxide |
| C. | chlorine |
| D. | sodium chlorine |
| Answer» D. sodium chlorine | |
| 467. |
The most appropriate method for separating a large quantity of a mixture of nonvolatile, nonpolar organic compounds would be__________? |
| A. | Distillation |
| B. | Extraction |
| C. | Gas chromatography |
| D. | Column chromatography |
| Answer» E. | |
| 468. |
The molecules of CO2 in dry ice form__________________? |
| A. | Ionic crystal |
| B. | Covalent crystal |
| C. | Molecular crystal |
| D. | Any type of crystal |
| Answer» D. Any type of crystal | |
| 469. |
The molecular formula for cholesterol is C27 H46 O. What are the degrees of unsaturation for this compound? |
| A. | 5 |
| B. | 6 |
| C. | 7 |
| D. | 8 |
| Answer» B. 6 | |
| 470. |
The molar mass of an organic acids is determined by____________? |
| A. | Depression of freezing point |
| B. | Volumetric method |
| C. | Victor Meyer’s method |
| D. | Osmosis method |
| Answer» C. Victor Meyer’s method | |
| 471. |
The molal boiling point constant is the ration of the elevation of boiling point to____________________? |
| A. | Molarity |
| B. | Molality |
| C. | More fraction of solvent |
| D. | Mole fraction of solute |
| Answer» C. More fraction of solvent | |
| 472. |
The metallurgical process in which a metal is obtained in a fused state is called__________? |
| A. | smelting |
| B. | roasting |
| C. | calcinations |
| D. | froth floatation |
| Answer» B. roasting | |
| 473. |
The metallic sound produced by engine due to the pre-ignition of fuel is called _______________? |
| A. | knocking |
| B. | reforming |
| C. | cracking |
| D. | a and c |
| Answer» B. reforming | |
| 474. |
The metal which is used in thermite process because of its activity is____________________? |
| A. | iron |
| B. | copper |
| C. | aluminium |
| D. | zinc |
| Answer» D. zinc | |
| 475. |
The melting points and boiling points upto meddle of 3d- series ____________________? |
| A. | increases |
| B. | decreases |
| C. | remain same |
| D. | no regular trend |
| Answer» B. decreases | |
| 476. |
The mechanism by which the genetic information can be duplicated is called_________________? |
| A. | Duplication |
| B. | Transcription |
| C. | Replication |
| D. | Mutation |
| Answer» D. Mutation | |
| 477. |
The maximum oxidation shown by manages is_________? |
| A. | +2 |
| B. | +4 |
| C. | +5 |
| D. | +7 |
| Answer» E. | |
| 478. |
The maximum number of orbitals present in a subshell that is represented by Azimuthal quantum number = 3 will be________________? |
| A. | 1 |
| B. | 3 |
| C. | 5 |
| D. | 7 |
| Answer» E. | |
| 479. |
The maximum number of electron in a sub shell with ? = 3fs______________? |
| A. | 6 |
| B. | 10 |
| C. | 14 |
| D. | 18 |
| Answer» D. 18 | |
| 480. |
The mass of P4O10 that will be obtained from the reaction of 1.33 gram of P4 and 5.07 of oxygen is___________? |
| A. | 2.05 gram |
| B. | 3.05 gram |
| C. | 4.05 gram |
| D. | 5.05 gram |
| Answer» C. 4.05 gram | |
| 481. |
The mass of one mole of electron is________________? |
| A. | 1.008 |
| B. | 0.55 |
| C. | 0.184 |
| D. | 1.637 |
| Answer» C. 0.184 | |
| 482. |
The mass of decimole of electrons (NA) is___________________? |
| A. | 1.008 mg |
| B. | 0.184 mg |
| C. | 0.054 mg |
| D. | 5.4 mg |
| Answer» D. 5.4 mg | |
| 483. |
The mass of 3.2 moles of ammonia (NH3) gas? |
| A. | 53.4 grams |
| B. | 54.4 grams |
| C. | 55.4 grams |
| D. | 56.4 grams |
| Answer» C. 55.4 grams | |
| 484. |
The major steps involved in complete quantitative analysis are _________________? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» D. 5 | |
| 485. |
The main product of bacterial action is_________________? |
| A. | Nox |
| B. | NO2 |
| C. | N2O3 |
| D. | NO |
| Answer» E. | |
| 486. |
The main pollutant of leather tanneries in the waste water is____________________? |
| A. | chromium III |
| B. | chromium IV |
| C. | chromium V |
| D. | chromium VI |
| Answer» C. chromium V | |
| 487. |
The main buffer system of the human blood is____________? |
| A. | H₂CO₃ – HCO₃ |
| B. | H₂CO₃ – CO₃²⁻ |
| C. | CH₃COOH – CH₃COO⁻ |
| D. | NH₂CONH₂ – NH₂CONH⁺ |
| Answer» B. H₂CO₃ – CO₃²⁻ | |
| 488. |
The magnetic quantum number (QN) has its values determined directly by the value of_______________? |
| A. | Principal (QN) |
| B. | Azimuthal (QN) |
| C. | Spin (QN) |
| D. | Both A & B |
| Answer» C. Spin (QN) | |
| 489. |
The longest period in the modern periodic table is___________________? |
| A. | 6th |
| B. | 7th |
| C. | 2nd and 3rd both |
| D. | 5th |
| Answer» B. 7th | |
| 490. |
The location of transition elements is in between__________________? |
| A. | lanthanides & actinides |
| B. | s and p block elements |
| C. | chalcogens and halogens |
| D. | d and f block elements |
| Answer» C. chalcogens and halogens | |
| 491. |
The Lewis acids are__________________? |
| A. | Electron deficient |
| B. | Electron rich |
| C. | Octet is complete |
| D. | No such acids exist |
| Answer» B. Electron rich | |
| 492. |
The letters s p d and f are used to represent which quantum numbers________________? |
| A. | Principal |
| B. | Azimuthal |
| C. | Magnetic |
| D. | Spin |
| Answer» C. Magnetic | |
| 493. |
The leements in which d or f orbitals are in the process of completion are__________________? |
| A. | outer transition elements |
| B. | inner transition elements |
| C. | typical transition elements |
| D. | transition elements |
| Answer» E. | |
| 494. |
The law which states that the amount of gas dissolved in a liquid is proportional to its partial pressure is___________? |
| A. | Dalton’s law |
| B. | Gay Lussac’s law |
| C. | Henry’s law |
| D. | Raoult’s law |
| Answer» D. Raoult’s law | |
| 495. |
The law of traids is applicable to__________? |
| A. | Li, Be, B |
| B. | F, Cl, Br |
| C. | Cl, Br, I |
| D. | Na, K, Rb |
| Answer» D. Na, K, Rb | |
| 496. |
The Latin word formica means ant. The name formic acid is derived from this Latin word because__________? |
| A. | this acid, in ancient times, was used to eliminate ant-hills |
| B. | this corrosive acid is secreted by ants to drive away their enemies |
| C. | this acid was first obtained by the distillation of ants |
| D. | ants are attracted by the odour of this acid |
| Answer» D. ants are attracted by the odour of this acid | |
| 497. |
The kinetic molecular theory of gases was put forward in 1738 by _____________________? |
| A. | Boltzman |
| B. | Maxell |
| C. | Clausius |
| D. | Bernoulli |
| Answer» E. | |
| 498. |
The IUPAC name of pyridines is__________? |
| A. | Azolo |
| B. | Azine |
| C. | Azolidins |
| D. | Diazine |
| Answer» C. Azolidins | |
| 499. |
The IUPAC suffix used for _______ NC group? |
| A. | Cyanide |
| B. | Isocyanides |
| C. | Nitrile |
| D. | Carbylamines |
| Answer» D. Carbylamines | |
| 500. |
The IUPAC name of ethylene oxide is__________? |
| A. | Epoxy methane |
| B. | Oxoethene |
| C. | Methoxymethane |
| D. | Oxirane |
| Answer» C. Methoxymethane | |