InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following isoelectronic species has the largest radius? |
| Answer» Correct Answer - C | |
| 2. |
Which one of the following sets of ions represents the collection of isoelectronic species?A. `Na^(+),Mg^(2+),Al^(3+),Cl^(-)`B. `Na^(+),Ca^(2+),Sc^(3+),F^(-)`C. `K^(+),Cl^(-),Mg^(2+),Sc^(3+)`D. `K^(+),Ca^(2+),Sc^(3-),Cl^(-)` |
| Answer» Correct Answer - D | |
| 3. |
In which of the following arrangements, the sequence is not strictly according to the property written against it ?A. `CO_(2)ltSiO_(2)ltSnO_(2)ltPbO_(2)` : increasing oxidising powerB. `BltCltOltN : ` increasing first ionisation enthalpyC. `NH_(3)ltPH_(3)ltAsH_(3)ltSbH_(3)`: increasing basic strengthD. `HFltHClltHBrltHI` : increasing acid strength |
| Answer» Correct Answer - C | |
| 4. |
Which one is not correct order of electro negativity.A. F `gt` Cl`gt` Br`gt` IB. Si`gt` Al `gt` Mg`gt` NaC. Cl`gt` S `gt` P `gt` SiD. None of these |
| Answer» Correct Answer - D | |
| 5. |
Which of the following has maximum number of unpaired electron (atomic number of `Fe 26`)A. FeB. Fe (II)C. Fe (Ill)D. Fe (IV) |
| Answer» Correct Answer - C | |
| 6. |
The size of the following species increases in the orderA. `Mg^(2+)ltNa^(+)ltF^(-)`B. `F^(-)ltNa^(+)ltMg^(2+)`C. `MgltF^(-)ltNa^(+)`D. `Na^(+)ltF^(-)ltMg^(2+)` |
| Answer» Correct Answer - A | |
| 7. |
Select the correct statement(s).A. The value of electron gain enthalpy of an element can be -ve or +ve.B. In the periodic table, metallic character of the elements increases down the group and decreases across the periodC. The `Cl^(-) & S^(2-)` are isoelectronic species but first one is not smaller in size than the secondD. Ionization enthalpy of an atom is equal to electron gain enthalpy of cation |
| Answer» Correct Answer - A::B::D | |
| 8. |
Highest size will be ofA. `Br^(-)`B. `I`C. `I^(-)`D. `I^(+)` |
| Answer» Correct Answer - C | |
| 9. |
Which of the following is correct order of EA.A. N `lt` C `lt` O `lt` FB. F `gt` Cl`gt` Br`gt` IC. Cl `gt` F `gt` Br `gt` lD. C`lt`N`lt`O`lt`F |
| Answer» Correct Answer - A::C | |
| 10. |
Element Cu has two oxidation states `Cu^(+1)` & `Cu^(+2)` the right order of radii of these ions.A. `Cu^(+1)gtCu^(+2)`B. `Cu^(+2)gtCu^(+1)`C. `Cu^(+1)=Cu^(+2)`D. `Cu^(+2)geCu^(+1)` |
| Answer» Correct Answer - A | |
| 11. |
Which of the following paramagnetic ions would exhibit a magnetic moment (spin only) of the order of 5 BM? (At. No : Mn = 25, Cr = 24,V = 23, Ti = 22)A. `V^(2+)`B. `Ti^(2+)`C. `Mn^(2+)`D. `Cr^(2+)` |
| Answer» Correct Answer - C | |
| 12. |
the number of d- electrons in `Mn^(2+)` is equal to that of :A. p-electrons in NB. s-electron in NaC. d-electrons in `Fe^(+3)`D. p-electrons in `O^(-2)` |
| Answer» Correct Answer - B::C | |
| 13. |
Statement-1 : `IE_(1)` ofN is greater than 0 . Statement-2: N-atom is bigger than O in size.A. Statement-1 is true, statement-2 is true and statement-2 is correct explanation for statement-1.B. Staterment-1 is true, statement-2 is true and statement-2 is NOT the correct explanation for statement-1.C. Statement-1 is true, statement-2 is false.D. Statement-1 is false, statement-2 is true. |
| Answer» Correct Answer - B | |
| 14. |
In the following reaction, ZnO is respectively acting as a/an (i) `ZnO+Na_(2)O rarr Na_(2)ZnO_(2)` (ii) `ZnO+CO_(2)rarr ZnCO_(3)`A. base and acidB. base and baseC. acid and acidD. acid and base |
| Answer» Correct Answer - D | |
| 15. |
Among the following which species is/are paramagnetic (i) `Sr^(2+)` (ii) `Fe^(3+)` (iii) `Co^(2+)` (iv) `S^(2-)` (v) `Pb^(2+)`A. i, iv, vB. i, ii, iiiC. ii, iiiD. iv, v |
| Answer» Correct Answer - C | |
| 16. |
Statement-1 : First electron gain enthalpy is alway -ve for an element. Statement-2 : Magnitude of electron gain enthalpy irregularly increases from left to right in a period.A. Statement-1 is true, statement-2 is true and statement-2 is correct explanation for statement-1.B. Staterment-1 is true, statement-2 is true and statement-2 is NOT the correct explanation for statement-1.C. Statement-1 is true, statement-2 is false.D. Statement-1 is false, statement-2 is true. |
| Answer» Correct Answer - D | |
| 17. |
Which of the following clement has highest metallic characterA. `{:("Element",IP),(P,17eV):}`B. `{:("Element",IP),(Q,2eV):}`C. `{:("Element",IP),(R,10eV):}`D. `{:("Element",IP),(S,13eV):}` |
| Answer» Correct Answer - B | |
| 18. |
The non-metal that does not exhibit posittve oxidation state is:A. OxygenB. FluorineC. IodineD. Chlorine |
| Answer» Correct Answer - B | |
| 19. |
Gaseous state electronic configuration of ntrogen atom can be represented as :A. B. C. D. |
| Answer» Correct Answer - A | |
| 20. |
The increasing order of the first ionization enthalpies of the elements B,P,S and F (lowest first) is:A. F `lt` S `lt` p `lt` BB. P `lt` S `lt` B `lt` FC. B `lt` P `lt` S `lt` F_D. B `lt` S `lt` P `lt` F |
| Answer» Correct Answer - D | |
| 21. |
Statement-1: Ionization potential of Sn is less than Pb. Statement-2 : Ionization potential is inversaly proportional to atomic size.A. Statement-1 is true, statement-2 is true and statement-2 is correct explanation for statement-1.B. Staterment-1 is true, statement-2 is true and statement-2 is NOT the correct explanation for statement-1.C. Statement-1 is true, statement-2 is false.D. Statement-1 is false, statement-2 is true. |
| Answer» Correct Answer - B | |
| 22. |
The decreasing size of `K^(+),Ca^(2+),Cl^(-) & S^(2-)` follows the order:A. `K^(+)gtCa^(+2)gtS^(-2)gtCl^(-)`B. `K^(+)gtCa^(+2)gtCl^(-)gtS^(-2)`C. `Ca^(+2)gtK^(+)gtCl^(-)gtS^(-2)`D. `S^(-2)gtCl^(-)gtK^(+)gtCa^(+2)` |
| Answer» Correct Answer - D | |
| 23. |
Which element has the highest first ionization energy?A. ScB. RbC. NaD. K |
| Answer» Correct Answer - A | |
| 24. |
The negative value of electron gain enthalpy is less for fluorine than for chlorine . Why?A. Smaller size of chlorine atomB. Bigger size of 2p orbital of fluorineC. High ionization enthalpy ol fluorineD. Smaller size of fluorine atom |
| Answer» Correct Answer - D | |
| 25. |
ln which of the following electronic configuration ionisation energy will be maximum inA. `[Ne]3s^(2)3p^(1)`B. `[Ne]3s^(2)3p^(2)`C. `[Ne]3s^(2)3p^(3)`D. `[Ar]3d^(10)4s^(2)4p^(3)` |
| Answer» Correct Answer - C | |
| 26. |
The ionization energy will be maximum for the process.A. ` Ba to Ba^(+)`B. `Be to Be^(+)`C. `Cs to CS^(+)`D. `Li to Li^(+)` |
| Answer» Correct Answer - B | |
| 27. |
Electron affinities of O,F,S and Cl are in the order.A. O `lt` S `lt` Cl `lt` FB. O `lt` S `lt` F `lt` ClC. S `lt` O `lt`Cl`lt` FD. S `lt` O `lt` F `lt` Cl |
| Answer» Correct Answer - B | |
| 28. |
Which one of the following statement (s) is (are) correct?A. The electronic configuration of Cr is [Ar] `3d^(5)4s^(1)`. (Atomic No. of Cr= 24)B. The magnetic quantum number may have a negative valueC. In silver atom, 23 electrons have a spin of one type and 24 of the opposite type. (Atomic No. of Ag=47)D. The oxidation state of nitrogen in `HN_(3)` is -3 |
| Answer» Correct Answer - A::B::C | |
| 29. |
The first ionisation potential of Na is 5.1 eV. The value of electron gain enthalpy of `Na^(+)` will be:-A. `-2.55` eVB. `-5.1` eVC. `10.2` eVD. `+2.55` eV |
| Answer» Correct Answer - B | |
| 30. |
The correct order of second ionisation potential of C, N, O and F is:A. ` C gt N gt O gt F `B. ` O gt N gt F gtC `C. `O gt F gt N gt C `D. `F gt O gt N gt C ` |
| Answer» Correct Answer - C | |
| 31. |
Of the following elements, which possesses the highest electron affinity?A. AsB. OC. SD. Se |
| Answer» Correct Answer - C | |
| 32. |
The process(es) requiring the absorption of energy is/are:A. `FtoF^(-)`B. `Cl toCl^(-)`C. `O^(-)toO^(2-)`D. `HtoH^(-)` |
| Answer» Correct Answer - C | |
| 33. |
The incorrect statement Among the following isA)The first ionisation potential of Al is less than the first ionisation potential of Mg.B)The first ionisation potential of Na is less than the first ionisation potential of Mg.C)The second ionisation potential of Mg greater than the second ionisation potential of NaD)The third ionisation potential of Mg greater than the third ionisation potential of AlA. the first ionisation potential of Al is less then the first ionisation potential of MgB. the second ionisation potential of Mg is greater then the second ionisation potential of NaC. the first ionisation potential of Na is less then the first ionisation potential of MgD. the third ionisation potential of Mg is greater then the third ionisation potential of Al |
| Answer» Correct Answer - B | |
| 34. |
The order of increasing sizes of atomic radii among the elements O, S, Se and As is :A. AS`lt`S`lt`O`lt`SeB. O`lt`S`lt`As`lt`SeC. Se`lt`S`lt`As`lt`OD. `OltSltSeltAs` |
| Answer» Correct Answer - D | |
| 35. |
Amongst the following, the incorrect statement isA. `IE_(1) (Al)lt IE_(1) (Mg)`B. `IE_(1) (Na)lt IE_(1) (Mg)`C. `IE_(2) (Mg)lt IE_(2) (Na)`D. `IE_(3)(Mg)gtIE_(3)(Al)` |
| Answer» Correct Answer - C | |
| 36. |
Amongst the following statements, which is/are correct?A. Electronegtaivity of sulphur is greater than that of oxygenB. Electron affinity of oxygen is smaller than that of sulphur.C. Electron gain enthalpy of fluorine is most negativeD. Electron gain enthalpy of chlorine is most negative |
| Answer» Correct Answer - B::D | |
| 37. |
The correct order of radii is :A. N `lt`Be`lt` BB. `F^(-)ltO^(2-)ltN^(3-)`C. Na`lt` Li`lt` KD. `Fe^(3+)lt Fe^(2+)ltFe^(4+)`. |
| Answer» Correct Answer - B | |
| 38. |
The least stable in amongst the following is :A. `Li^(-)`B. `Be^(-)`C. `B^(-)`D. `C^(-)` |
| Answer» Correct Answer - B | |
| 39. |
The set representing correct order of `IP_(1)` isA. K `gt` Na `gt` LiB. Be `gt` Mg `gt` CaC. B `gt` C `gt` ND. Fe`gt` Si`gt` C |
| Answer» Correct Answer - B | |
| 40. |
The option (s) with only amphoteric oxides is (are)A. `Cr_(2)O_(3),CrO,SnO,PbO`B. `NO,B_(2)O_(3),PbO,SnO_(2)`C. `Cr_(2)O_(3),BeO,SnO,SnO_(2)`D. `ZnO,Al_(2)O_(3),PbO,PbO_(2)` |
| Answer» Correct Answer - C::D | |
| 41. |
In the following which configuration element has maximum electronegativity.A. `1s^(2),2s^(2)2p^(5)`B. `1s^(2),2s^(2)2p^(6)`C. `1s^(2),2s^(2)2p^(4)`D. `1s^(2),2s^(2)2p^(6),3s^(2),3p^(3)` |
| Answer» Correct Answer - A | |
| 42. |
The outer shell configuration of the most electronegative element isA. `ns^(2) np^(3)`B. `ns^(2) np^(4)`C. `ns^(2) np^(5)`D. `ns^(2) np^(6)` |
| Answer» Correct Answer - C | |
| 43. |
Calculate the effective nuclear charge at the periphery of nitrogen atom when an extre electron is added in the formation of anion . Also calculate the effective nuclear charge of N-atom. |
|
Answer» Ground state electron configuration of N(Z=7)=`1s^(2)2s^(2)2p^(3)` Electron configuration of `N^(-)=(1s^(2))(2s^(2)2p^(4))` Shielding constant for the last 2p electron, `sigma=[(2xx0.85)+(5xx0.35)]=3.45` So `Z_(eff)=Z-sigma=7-3.45=3.55` Electron configuration of `N^(+)=(1s^(2))(2s^(2)2p^(2))` Shielding constant for the last 2p electron, `sigma=[(2xx0.85)+(3xx0.35)]=2.75` So `Z_(eff)` for the last electron on `N^(+)=7-2.75=4.25` |
|
| 44. |
Which of the following sets of quantum numbers is correct for an electron in 4f-orbtial ?A. `n=3,l=2,m=-2,s=+1/2`B. `n=4,l=4,m=-2,s=-1/2`C. `n=4,l=3,m=+1,s=+1/2`D. `n=4,l=3,m=+4,s=+1/2` |
| Answer» Correct Answer - C | |
| 45. |
The atomic numbers of vandium `(V)`. Chromium `(Cr)`, manganese `(Mn)` and iron (Fe) respectively 23, 24,25 and 26. Which one of these may be expected to have the higher second ionization enthalpy ?A. CrB. MnC. FeD. V |
| Answer» Correct Answer - A | |
| 46. |
The numbers of protons, electrons and neutrons in a molecule of heavy water are respectivelyA. 10,10,10B. 8,10,11C. 10,11,10D. 11,10,10 |
| Answer» Correct Answer - A | |
| 47. |
Principal quantum number of an atom represents :A. Size of the orbitalB. Spin angular momentumC. Orbital angular momentumD. Space orientation of the orbital |
| Answer» Correct Answer - A | |
| 48. |
The number of neutrons in dipositive zinc ion with mass number `70` is.A. 34B. 40C. 36D. 38 |
| Answer» Correct Answer - B | |
| 49. |
The ionic radii of `N^(3-), O^(2-)` and `F^(-)` are respectively given by:A. 1.71, 1.40 and 1.36B. 1.71, 1.36 and 1.40C. 1,36 1.40 and 1.71 .D. 1.36 1.71 and 1.40 |
| Answer» Correct Answer - A | |
| 50. |
Correct set of four quantum numbers for the valence (outermost) electron of rubidium `(Z = 37)` isA. `5,1,1,+1/2`B. `5,0,1,+1/2`C. `5,0,0,+1/2`D. `5,1,0,+1/2` |
| Answer» Correct Answer - C | |