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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.
| 651. |
The `IP_(1)` of O,S,RF & Cl are in the order ofA. `F gt O gt Cl gt S`B. `S gt Cl gt O gt F`C. `Cl gt S gt O gt F`D. `F gt Cl gt O gt S` |
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Answer» Correct Answer - A |
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| 652. |
Which one of the following elements has the highest ionisation energy?A. `[Ne]3s^(2)3p^(1)`B. `[Ne]3s^(2)3p^(2)`C. `[Ne]3s^(2)3p^(3)`D. `[Ar]3s^(10)4s^(2_4p^(3)` |
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Answer» Correct Answer - C |
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| 653. |
Which of the following pairs of atoms have same number of electrons in the outermost orbitA. `N-O`B. `Na-Cl`C. `Ca-Cl`D. `Cl-Br` |
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Answer» Correct Answer - D |
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| 654. |
The correct order of ionization energies isA. `Zn lt Cd lt Hg`B. `Hg lt Cd lt Zn`C. `Ar gt Ne gt He`D. `Cs lt Rb lt Na` |
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Answer» Correct Answer - D |
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| 655. |
Configuration that shows the highest energy released when an electron is added to the atom isA. `1s^(2)2s^(2)2p^(3)`B. `1s^(2)2s^(2)2p^(4)`C. `1s^(2)2s^(2)2p^(5)`D. `1s^(2)2s^(2)2p^(6)` |
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Answer» Correct Answer - C |
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| 656. |
The removal of an electron is very difficult fromA. Argon atomB. Chloride ionC. Calcium ionD. Sodium ion |
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Answer» Correct Answer - D |
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| 657. |
Mg cannot exhibit `+3` oxidation state, because its:A. `IE_(3) lt lt IE_(2)`B. `IE_(1) ~~ IE_(2)`C. `IE_(3) gt gt IE_(2)`D. `IE_(3) = 0` |
| Answer» Correct Answer - C | |
| 658. |
Which of the following order is correct for indicated property?A. `I_(1) gt Br_(2) gt CI_(2) gt F_(2)` (Reactivity)B. `Li(aq) gt Na(aq) gt K^(+)(aq)` (electrical conductivity)C. `Na gt Mg gt Cu` (Electropositive character)D. `N^(-3) gt O^(-2) gt Mg^(+2) gt Na^(+)` (Ionic size) |
| Answer» Correct Answer - C | |
| 659. |
The ionisation energy and electron affinity of an element are 13.0ev and 3.8 ev respectively. Its electronegativity isA. `2.8`B. `3.0`C. `3.5`D. `4.0` |
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Answer» Correct Answer - B |
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| 660. |
In a period element with large radius is aA. Alkali elementB. Alkaline earth elementC. Noble has secondD. Chalcogen |
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Answer» Correct Answer - A |
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| 661. |
The `IP_(1),IP_(2),IP_(3)` and `IP_(4)` of an element A are `6.0, 10.0, 16.0` and `45.0ev` respectively. The molecular weight of the oxide of the element A is (x is atomic weight)A. `x +48`B. `2x +48`C. `3 x +48`D. `x +32` |
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Answer» Correct Answer - B |
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| 662. |
Ionisation energies of `CI^(-), CI` and `CI^(+)` are respectively (in kJ/mol):A. `1251,349,2300`B. `2300,349,1251`C. `349,1251,2300`D. `349,2300,1251` |
| Answer» Correct Answer - C | |
| 663. |
H-H, X-X and `H-X` bond energies are `104 Kcal//"mole" 60 Kcal//"mole"` and `101kcal//"mole"`. Assuming the electronegativity of hydrogen to be 2.1 the electronegativity of unknown element X is `(sqrt(19) = 4.36)`A. 3.5B. 3C. 4D. 2.5 |
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Answer» Correct Answer - B |
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| 664. |
Which of the following transitions do represents first ionisation potential ?A. `M_((g))^(-) rarr M_((g))`B. `M_((g)) rarr M_((g))^(+)`C. `M_((g))^(+) rarr M_((g))^(2+)`D. `M_((g))^(+2) rarr M_((g))^(3+)` |
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Answer» Correct Answer - B |
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| 665. |
The increasing order of the atomic radius of `Si,S, Na, Mg,Al` isA. `S lt Si lt Al lt Mg lt Na`B. `Na lt Al lt Mg lt S lt Si`C. `Na lt Mg lt Si lt Al lt S`D. `Na lt Mg lt Al lt Si lt S` |
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Answer» Correct Answer - A |
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| 666. |
Correct order of the property indicated below`-`A. `Na gt Al gt Mg gt Si" "IE_(1)`B. `Cl gt S gt O gt F" "DeltaHeg_(1)`C. `F gt O gt Cl gt S" "EN`D. `Cl gt O gt F gt S" "EA_(1)` |
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Answer» Correct Answer - 3 Correct order of electro negativity `underset((4))(F)gtunderset((3.5))(O)gtunderset((3))(Cl)gtunderset((2.5))(S)` |
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| 667. |
Which is the correct property mentioned `-`A. `Fe^(+) lt Fe^(2+) lt Fe^(3+)-`sizeB. `Fe^(+) lt Fe^(2+) lt Fe^(3+)-`ionisation energyC. `B lt Be lt C-`D. `N lt O lt F-`ionisation energy |
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Answer» Correct Answer - 2 `I.E.` increases on increasing `+ve` charge on species due to more Zeff. |
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| 668. |
`A^(+)(g) rarr A(g) DeltaH =- 2eV` `2A(g) rarr 2A^(+) (g) DeltaH = x` Find the value of x in eV. |
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Answer» Correct Answer - `004` `{:(A^(+) rarr A, DeltaH =- 2eV),(rArr A rarr A^(+),DeltaH =+2eV),(rArr 2A rarr 2A^(+),DeltaH =+4eV):}` |
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| 669. |
Number of unpaired electrons in `Mn^(+7) = a` Number of d-subshell electrons in `Cr = b` Number of f-subshell electrons in Hf (Atomic no = 72) = c Find the value of `C - b+a` |
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Answer» Correct Answer - `009` `a = 0, b = 5, c = 14` |
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| 670. |
The number of oxides which are expected to be neutral amongst the oxides of nitrogen (viz. `N_(2)O, NO, NO_(2),N_(2)O_(4),N_(2)O_(5)) = x` The number of oxides which are expected to be more basic with respect to `NiO` amongst `MgO, SrO, K_(2)O=y`. Find the value of x+y. |
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Answer» Correct Answer - `005` `x = 2 (NO,N_(2)O), y = 3(MgO, SrO, K_(2)O)` |
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| 671. |
How many of the following species have lower `IE_(1)` value compared to `F^(-)`? `CI^(-),Br^(-),O^(-),I^(-)` |
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Answer» Correct Answer - `003` `Br^(Theta), O^(Theta), I^(Theta)` |
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| 672. |
What is the value of `(n+l)` for the unpaired `e^(-)` in an atom of an element which is present in the 3rd period and seventeenth group of the periodic table. |
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Answer» Correct Answer - `004` `n = 3, l = 1` |
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| 673. |
How may elements will be present in the 12th period of periodic table. |
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Answer» Correct Answer - 98 `12s " "12p` `1+3 +5 +7 +9 +11 +13 = 49` orbitals `49 xx 2 = 98` elements. |
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| 674. |
The ascending order of the first ionisation potential of C, N, O and F is _______. |
| Answer» Correct Answer - C, O, N, F | |
| 675. |
The total number of inner transition elements present in the 7th period are _________. |
| Answer» Correct Answer - 14 | |
| 676. |
If `3e^(-)` can be accomodated in each orbital then how many elements will be present in the 7th period of periodic table? |
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Answer» Correct Answer - 48 `7s" "7p` `{:(6d),(5f):}` No. of orbitals `= 1 +3 +5 +7 = 16`. `16 xx 3 = 48` |
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| 677. |
Among the following electronic configurations which one will have highest electron affinity valueA. `1s^(2)`B. `1s^(2) 2s^(2)`C. `1s^(2) 2s^(2) 2p^(4)`D. `1s^(2) 2s^(2) 2p^(5)` |
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Answer» Correct Answer - D |
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| 678. |
The `Z_(eff)` for 3d electron of `Cr` `4s` electron of `Cr` `3d` electron of `Cr^(3+)` `3s` electron of `Cr^(3+)` are in the order respectivelyA. 4.6,2.95,4.95,8.05B. 4.95,2.95,4.6,8.05C. 4.6,2.95,5.3,16.55D. none of these |
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Answer» Correct Answer - C `[C_(r) = 1s^(2) 2s^(2) 2p^(6) 3s^(2)3p^(6) 4s^(1) 3d^(5)` `Z_(eff) =` Atomic no `sigma` s for 4s electron (valence shell `e^(-) -1) xx 0.35 +` Penultimate shell `e^(-) xx 0.85 + `remaining `e^(-)` `= (1-1) xx 0.35 +13 xx 0.85 +10` `= 0 + 11.05 +10 = 21.05` `Z_(eff) = 24 - 21.05 = 2.95` `Z_(eff)` for 3d electron `sigma` for `3de^(-) =` (valence shell `e^(-)-1) xx 0.35 +` remaining `e^(-)` `= (5-1) xx 0.35 +18` `= 1.4 +18 = 19.4` `24 - 19.4 = 4.6]` |
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| 679. |
Among the following outermost configurations of transitionn metals, which shows the highest oxidation stateA. `3d^(3)4s^(2)`B. `3d^(5)4s^(1)`C. `3d^(5)4s^(2)`D. `3d^(6)4s^(2)` |
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Answer» Correct Answer - C |
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| 680. |
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. `Cr`B. `Mn`C. `Fe`D. `V` |
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Answer» Correct Answer - A [Basic characters `prop` electropositive/metallic character] |
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| 681. |
Select correct statement.A. Atomic size of the same group elements of 3d and 4d-series are almost similarB. First ionisation energies of 5d-series elements are smaller than that of 3d and 4d-series elementsC. Both are correctD. Both are incorrect |
| Answer» Correct Answer - D | |
| 682. |
Transition metals exhibit variable oxidation states. It is because ofA. (a) the smaller atomic radiusB. (b) the high screening effectC. (c) the very less energy difference vetween `(n-1)` d-subshell and ns-subshellD. (d) the high nuclear charge |
| Answer» Correct Answer - C | |
| 683. |
A sudden large jump between the values of second and third ionisation energies of an element would be associated with the electronic configurationA. `1s^(2) 2s^(2) 2p^(6) 3s^(1)`B. `1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(1)`C. `1s^(2) 2s^(2) 2p^(6) 3s^(2)`D. `1s^(2) 2^(s)22p^(6) 3s^(2) 3p^(3)` |
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Answer» Correct Answer - C |
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| 684. |
Which element having the following electronic configuration has minimum ionisation potential?A. `1s^(2),2s^(2),2p^(5)`B. `1s^(2),2s^(2)2p^(6),3s^(2)3p^(2)`C. `1s^(2),2s^(2)2p^(6),3s^(1)`D. `1s^(2),2s^(2)2p^(6)` |
| Answer» Correct Answer - C | |
| 685. |
Some of the properties which depend on electronic configuration elements are - atomic radii, ionisation potential, and electronegativity etc. In period, the ionisation energy is lowest for the:A. noble gasesB. halogensC. alkaline earth metalsD. alkali metals |
| Answer» Correct Answer - D | |
| 686. |
Some of the properties which depend on electronic configuration elements are - atomic radii, ionisation potential, and electronegativity etc. The element with maximum electrongativity belongs to :A. period 2, group 17B. period 3, group 18C. period 4, group 17D. period 2, group 16 |
| Answer» Correct Answer - A | |
| 687. |
Why do most of the inner transition elements exhibit stable +3 oxidation state? |
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Answer» (i) electronic configuration of inner transition elements, entry of differentiating electron (ii) comparison of energy of valence shell and that of penultimate shell (iii) perticipation of penultimate shell electrons in bonding |
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| 688. |
The name of the element with atomic number 100 was adopted in honour ofA. Alfred NobleB. Enric FermiC. Dimitri MendeleefD. Albert Einstein |
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Answer» Correct Answer - B |
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| 689. |
The element with `ns^(2)np^(4)` as outer electron configuration is aA. AlkalimetalB. ChalcogenC. Noble gasD. Halogen |
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Answer» Correct Answer - B |
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| 690. |
From the ground state, electronic configuration of the elements given below, pick up the one with highest value of second ionization energy:A. `1s^(2)2s^(2)2p^(6)3s^(2)`B. `1s^(2)2s^(2)2p^(6)3s^(1)`C. `1s^(2)2s^(2)2p^(6)`D. `1s^(2)2s^(2)2p^(5)` |
| Answer» Correct Answer - B | |
| 691. |
Which one of the following electronic configuration of an atom has the highest ionisation energy?A. `1s^(2),2s^(2)2p^(3)`B. `1s^(2),2s^(2)2p^(6),3s^(1)`C. `1s^(2),2s^(2)2p^(6)`D. `1s^(2),2s^(2)2p^(5)` |
| Answer» Correct Answer - C | |
| 692. |
Ce-58 is a member ofA. s-blockB. p-blockC. d-blockD. f-block |
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Answer» Correct Answer - D |
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| 693. |
Inner transition elements exhibit different coloured compounds on account of unfilled ........OrbitalsA. sB. fC. dD. p |
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Answer» Correct Answer - B |
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| 694. |
Four elements P,Q,R & S have ground state electronic configuration as: `{:(P rarr 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(3),Q rarr 1s^(2) 2s^(2)2p^(6)3s^(2)3p^(1)),(R rarr 1s^(2) 2s^(2)2p^(6)3s^(2)3p^(6)3d^(10)4s^(2)4p^(3),S rarr 1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)3d^(10)4s^(2)4p^(1)):}` Comment which of the following option represent the correct order of true (T) & false (F) statement I size of `P lt` size of Q II size of `R lt` size of S III size of `P lt` size of R (appreciable difference) IV size of `Q lt` size of S (appreciable difference)A. `T T T T`B. `T T T F`C. `F F T T`D. `T T F F` |
| Answer» Correct Answer - B | |
| 695. |
Four elements P,Q,R & S have ground state electronic configuration as: `{:(P rarr 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(3),Q rarr 1s^(2) 2s^(2)2p^(6)3s^(2)3p^(1)),(R rarr 1s^(2) 2s^(2)2p^(6)3s^(2)3p^(6)3d^(10)4s^(2)4p^(3),S rarr 1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)3d^(10)4s^(2)4p^(1)):}` Comment which of the following option represent the correct order of true (T) & false (F) statement I size of `P lt` size of Q II size of `R lt` size of S III size of `P lt` size of R (appreciable difference) IV size of `Q lt` size of S (appreciable difference)A. TTTTB. TTTFC. FFTTD. TTFF |
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Answer» Correct Answer - A |
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| 696. |
The element with electron configuration `1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)3d^(10)4s^(2)4p^(5)` belongs toA. 4th period, VA groupB. 5th period, IVA groupC. 4th period, VIIA groupD. 7th period, IVA group |
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Answer» Correct Answer - C |
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| 697. |
Four elements P,Q,R & S have ground state electronic configuration as: `{:(P rarr 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(3),Q rarr 1s^(2) 2s^(2)2p^(6)3s^(2)3p^(1)),(R rarr 1s^(2) 2s^(2)2p^(6)3s^(2)3p^(6)3d^(10)4s^(2)4p^(3),S rarr 1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)3d^(10)4s^(2)4p^(1)):}` Order of `IE_(1)` values among the following isA. `P gt R gt Q = S`B. `P lt R lt S lt Q`C. `R gt S gt P gt Q`D. `P gt S gt R gt Q` |
| Answer» Correct Answer - A | |
| 698. |
Amongst the following elements whose electronic configuration are given below, the one having the highest enthalpy isA. `[Ne] 3s^(2)3p^(1)`B. `[Ne]3s^(2)3p^(3)`C. `[Ne]3s^(2)3p^(2)`D. `[Ar] 3d^(10) 4s^(2)4p^(3)` |
| Answer» Correct Answer - B | |
| 699. |
Higher values of ionisation energies of the 5d-transition elements are consistent with the:A. relative smaller effective nuclear chargeB. relative smaller size of their atomsC. relative smaller penetrationD. all are correct |
| Answer» Correct Answer - B | |
| 700. |
Lanthanum belongs to …. BlockA. s-blockB. p-blockC. d-blockD. f-block |
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Answer» Correct Answer - C |
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