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. |
In sodium atom on `3s` electron the screening is due to:A. `3s^(2),3p^(6)`B. `4s^(1)`C. `1s^(2),2s^(2),2p^(6)`D. `3s^(1)` |
| Answer» Correct Answer - C | |
| 2. |
What is correct order of reducing capacity.A. `Ge^(2+) gt Sn^(2+) gt Pb^(2+)`B. `Ge^(2+) lt Sn^(2+) lt Pb^(2+)`C. `Ge^(2+) ~~ Sn^(2+) ~~ Pb^(2+)`D. `Pb^(2+) gt Ge^(2+) gt Sn^(2+)` |
| Answer» Correct Answer - A | |
| 3. |
Which of the following elements can heve negative oxidation states.A. `AI`B. `Ca`C. `Fe`D. `B` |
| Answer» Correct Answer - D | |
| 4. |
The oxidation number that iron does not exhibit in its common compounds or in its elemental state is: |
| Answer» Correct Answer - B | |
| 5. |
Which can have both +ve and -ve oxdiation states in their compoundsA. `F`B. `I`C. `Na`D. `AI` |
| Answer» Correct Answer - B | |
| 6. |
Which metal exhibits more than one oxidation states in their compoundsA. `Na`B. `Mg`C. `AI`D. `Fe` |
| Answer» Correct Answer - D | |
| 7. |
The prperties which are not common to both groups 1 and 17 elements in the p-periodic table are:A. Electropositive character increase down the groups.B. Reactivity decrease from top to bottom in these groups.C. Atomic radii increase as the atomic number increase. D. Electronegativity decreases on moving down the group |
| Answer» Correct Answer - B | |
| 8. |
Which of the following compounds are found to exist (General formula obtaining)?A. `MgF`B. `Cu_(2)CI_(2)`C. `NaF_(2)`D. `K_(2)O` |
| Answer» Correct Answer - B::D | |
| 9. |
The prperties which are not common to both groups 1 and 17 elements in the p-periodic table are:A. Electropositive character increase down the groups.B. Reactivity decrease from top to bottom in these groups.C. Atomic radii increase as the atomic number increase.D. Electronegativity decreases on moving down the group |
| Answer» Correct Answer - B | |
| 10. |
Electron affinity is the `:`A. Energy absorbed when an electron is added to an isolated atom in the gaseous stateB. Energy released when an electron is added to an isolated atom in the gasesou stateC. Energy required to take out an electron from an isolated gaseous atomD. Power of an atom to attract an electron to itself. |
| Answer» Correct Answer - 2 | |
| 11. |
The ion having a noble gas electronic configuration isA. `Se^(2-)`B. `Fe^(3+)`C. `Cr^(3+)`D. `Cu^(+)` |
| Answer» Correct Answer - A | |
| 12. |
The chemical name of `NaH_(2)PO_(4)` is `-`A. Sodium dihydrogen phosphiteB. Sodium dihydrogen phosphideC. Sodium hydrogen phosphateD. Sodium dihydrogen phosphate |
| Answer» Correct Answer - 4 | |
| 13. |
The correct statement for the molecule `CsI_(3)` isA. it contains `Cs^(+),I^(-)` and molecular `I_(2)`B. it is a covalent compoundC. it contains `Cs^(+)` and `I_(3)^(-)`D. it contains `Cs^(3+)` and `I^(-)` |
| Answer» Correct Answer - C | |
| 14. |
The group in the periodic table that contains the elements in all the different physical states at room temperature isA. `VA`B. `IA`C. `VIIA`D. `IVA` |
| Answer» Correct Answer - C | |
| 15. |
The chemical formula of Permanganic acid is `-`A. `HMnO_(4)`B. `H_(2)MnO_(4)`C. `HMnO_(3)`D. `H_(2)MnO_(3)` |
| Answer» Correct Answer - 1 | |
| 16. |
The incorrect order of radius is:A. `Cu^(-) gt Cu gt Cu^(+)`B. `Sc^(3+) gt K^(+) gt S^(2-)`C. `Ni lt Cu lt Zn`D. All of these |
| Answer» Correct Answer - B | |
| 17. |
Which of the followig ions will show highest magnetic moment `(Z` values for nautral atoms are as follows: `N = 7, Cr = 24, Fe = 26 & Co = 27)`A. `Fe^(3+)`B. `Cr^(3+)`C. `N^(3+)`D. `Co^(3+)` |
| Answer» Correct Answer - A | |
| 18. |
Which Group IIIA elements is expected to have physical and chemical properties least similar to other members of that group?A. `Ga`B. `AI`C. `B`D. `In` |
| Answer» Correct Answer - C | |
| 19. |
The atomic number of `V,Cr, Mn and Fe` are respectively `23,24,25 and 26.` Which one of these may be expected to have the highest second ionization enthalpy?A. `V`B. `Cr`C. `Mn`D. `Fe` |
| Answer» Correct Answer - B | |
| 20. |
The reduction potentials of `Zn, Cu, Fe` and `Ag` are in the increasing order:A. `Zn, Cu, Fe, Ag`B. `Cu, Ag, Fe, Zn`C. `Ag, Cu, Fe, Zn`D. `Fe, Zn, Cu, Ag` |
| Answer» Correct Answer - C | |
| 21. |
Which of these ions is expected to be colored in aqeous solution? [I] `Fe^(3+)` [II] `Zn^(2+)` [III] `AI^(3+)` [IV] `Sc^(3+)`A. [I] onlyB. [III] onlyC. [I] and [II] onlyD. [I], [II] and [III] |
| Answer» Correct Answer - A | |
| 22. |
Assuming a Lewis structure for `SO_(2)` in which all the atoms obey the octet rule, the formal charge on `S` is:A. `+1`B. 0C. `+2`D. 2 |
| Answer» Correct Answer - B | |
| 23. |
Europium forms stable `Eu^(2+)` ions becauseA. Europium is a lanthanideB. `+2` is the common oxidation state of lanthanides.C. `Eu^(2+)` has `f^(7)` valence electronic configurationD. All of the above reasons. |
| Answer» Correct Answer - C | |
| 24. |
Element having `(4,0,0+1//2)` as a set of four quantum numbers for its valence electron is-A. `Na`B. `Ca`C. `K`D. `Br` |
| Answer» Correct Answer - C | |
| 25. |
In the compound `Na_(2)S_(2)O_(3)`, the oxidation state of sulphur is:A. `-2`B. `+2`C. `+4`D. `+6` |
| Answer» Correct Answer - B | |
| 26. |
In which of the following elements `+3` oxidation state is more stable than `+5`?A. `P`B. `As`C. `N`D. `Bi` |
| Answer» Correct Answer - D | |
| 27. |
Which element of `3rd` row has biggest atomic size?A. chlorineB. sodiumC. siliconD. neon |
| Answer» Correct Answer - D | |
| 28. |
`4s` orbitals has less energy than `3d` orbitalA. Greater value of `n`B. Lesser value of `l`C. Lesser value of (`n+l)`D. `l = 0` |
| Answer» Correct Answer - C | |
| 29. |
The first four ionization energies of an element are `191, 578, 872`, and `5962 "kca"l`. The number of valence electrons in the element is.A. 1B. 2C. 3D. 5 |
| Answer» Correct Answer - C | |
| 30. |
The atomic number of an element which can not show the oxidation state of `+3` is-A. 13B. 32C. 33D. 17 |
| Answer» Correct Answer - B | |
| 31. |
The order of screeing effect of electrons of `s,p,d` and `f` orbitals of a given shell of an atom on its outer shell electrons is:A. `s gt p gt d gt f`B. `f gt d gt p gt s`C. `p lt d lt s gt f`D. `f gt p gt s gt d` |
| Answer» Correct Answer - A | |
| 32. |
The number of unpaired electron in `Ni^(2+)` is |
| Answer» Correct Answer - B | |
| 33. |
Einstenium has 11 electrons in the `4f` subshell. The number of unpaired electrons in the subshell is:A. 3B. 4C. 7D. 11 |
| Answer» Correct Answer - A | |
| 34. |
Among following species which of them have maximum `Z_(eff)`A. `Sn`B. `Sn^(4+)`C. `In`D. `In^(+)` |
| Answer» Correct Answer - B | |
| 35. |
The number of unpaired electrons in the scandium atom isA. 1B. 2C. 0D. 3 |
| Answer» Correct Answer - A | |
| 36. |
Elements of which block in modern periodic table cannot have-ve oxidation state?A. `s`B. `d`C. `p`D. None of these |
| Answer» Correct Answer - A | |
| 37. |
Which of the following have greater `Z_(eff)` than `Zn:`A. `Cu^(+)`B. `Cu^(2+)`C. `Fe^(3+)`D. `Zn^(2+)` |
| Answer» Correct Answer - A::B::C::D | |
| 38. |
In the modern periodic table, elements are arranged in order of increasing atomic numbers, which is related to the electornic configuration. Depending upon the type of orbitals receiving the last electron, the elements in the periodic table have been divided into four blocks, viz, p,d and f. The modern periodic table consists of 7 periods and 18 groups. Each period begins with the filling of a new energy shell. in accordance with the Aufbau principal, the seven periods (1 to 7) have 2,8,8,18,18,32 and 32 elements respectively. The seventh period is still incomplete. To avoid the periodic table being too long, the two series of f-block elements, called lanthanoids and actinoids, are placed at the bottom of the main body of the periodic table The element with atomic number 57 belongs toA. s-blockB. p-blockC. d-blockD. f-block |
| Answer» Correct Answer - C | |
| 39. |
Which of the following sequence of elements is arranged in the order of increasing atomic radii?A. `Na, Mg, AI, Si`B. `C, N, O, F`C. `O, S, Se, Te`D. `I, Br, CI, F` |
| Answer» Correct Answer - C | |
| 40. |
Element corresponding to which of these//this atomic number belongs to p-block in Modern Periodic Table:A. 19B. 35C. 53D. 83 |
| Answer» Correct Answer - B::C::D | |
| 41. |
When the atoms `Li,Be,B` and `Na` are arranged in order of increasing atomic radius, what is the correct order?A. `B, Be, Li, Na`B. `Li, Be, B, Na`C. `Be, Li, B, Na`D. `Be,B, Li, Na` |
| Answer» Correct Answer - A | |
| 42. |
Which of the following elements will gain one electron radily in comparison to other elements of their group?A. `S(g)`B. `N(g)`C. `O(g)`D. `CI(g)` |
| Answer» Correct Answer - A::D | |
| 43. |
Which one of the following arrangements represents the correct order of electron gain enthalpy of the given atomic species?A. `CI lt F lt S lt O`B. `O lt S lt F lt CI`C. `S lt O lt CI lt F`D. `F lt CI lt O lt S` |
| Answer» Correct Answer - B | |
| 44. |
Which represents alkali metals (i.e. `1^(st)` group metals) based on `(IE)_(1)` and `(IE)_(2)` value (in `KJ//mol)`?A. `{:(,(IE)_(1),(IE)_(2)),(X,500,1000):}`B. `{:(,(IE)_(1),(IE)_(2)),(Y,600,2000):}`C. `{:(,(IE)_(1),(IE)_(2)),(Z,550,7500):}`D. `{:(,(IE)_(1),(IE)_(2)),(M,700,1400):}` |
| Answer» Correct Answer - C | |
| 45. |
The number of valence electrons in an atom with the configuration `1s^(2)2s^(2)2p^(6)3s^(2)3p^(2)` is:A. 6B. 5C. 4D. 2 |
| Answer» Correct Answer - C | |
| 46. |
The correct order of increasing first ionization energy isA. `Ca lt K lt Ne lt P lt F`B. `F lt Ca lt n e lt P lt K`C. `K lt Ca lt Plt F lt Ne`D. `Ne lt F lt P lt Ca lt K` |
| Answer» Correct Answer - C | |
| 47. |
Which of the following contains atomic number of only s-blockA. 55,12, 18, 53B. 13, 33, 54, 83C. 3, 20, 55, 87D. 22, 33, 55, 66 |
| Answer» Correct Answer - C | |
| 48. |
Which of the following statements is correct?A. Electron gain enthalpy may be positive for some elements.B. Second electron gain enthalpy always remains positive for all the elements.C. `Delta_(eg)H(K^(+)) =- IE (K)`D. All of these |
| Answer» Correct Answer - D | |
| 49. |
Which of the following is most electronegative element.A. `Li`B. `Mg`C. `H`D. `Na` |
| Answer» Correct Answer - C | |
| 50. |
The period number in the long form of the periodic table is equal to:A. magnetic quantum number of any element of the period.B. atomic number of any element of the period.C. maximum principal quantum number of any element of the period.D. maximum Azimuthal quantym number of any element of the period. |
| Answer» Correct Answer - C | |