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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.
| 551. |
Which of the following set has the strongest tendency to form anions?A. `Ga,In,Fe`B. `Na,Mg,AI`C. `N,O,F`D. `V,Cr,Mn` |
| Answer» Correct Answer - C | |
| 552. |
The species having 4 or more unpaired electrons are:A. `Fe^(2+)`B. `Co^(3+)`C. `Mn^(2+)`D. `Ni^(2+)` |
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Answer» Correct Answer - A::B::C (a) `Fe^(2+)` is `d^(6)` (b) `Co^(3+)` is `d^(6)` (c) `Mn^(2+)` is `d^(5)` (d) `Ni^(2+)` is `d^(8)` |
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| 553. |
From the following information `{:(A^(-)(g)rarrA^(+2)(g)+3e^(-),DeltaH_(1) = 1400 kJ//"mole"),(A(g)rarrA^(+2)(aq)+2e^(-),DeltaH_(2) = 700 kJ//"mole"),(DeltaH_(EG)[A^(+)(g)] =- 350 kJ//mol,),((IE_(1)+IE_(2))for A(g) = 950kJ//mol,):}` Find (a) `IE_(1)` of A (b) `IE_(2)` of A (c) `DeltaH_(EG)` of A (d) `DeltaH_(HE)` of A^(2+)(g)` |
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Answer» Correct Answer - (a) `IE_(1)` of `A = 350 kJ//mol`, (b) `IE_(2) = 600 kJ//mol`, (c) `DeltaH_(EG)H` of `A =- 450 kJ//mol`, (d) `Delta_(HE)H` of `(A^(2+)) =- 250 kJ//mol` `{:(A^(-)rarrA_((g))+e^(-),),(A rarr A_((g))^(+)+e^(-),),(A^(+)rarrA_((g))^(+2)+1e^(-),):}}DeltaH_(1) = 1400 KJ//mol` `{:(A_((g))rarrA_((g))^(+),),(A^(+)rarrA_((g))^(+2),),(A_((g))^(+2)rarrA_((aq))^(+2),):}}DeltaH_(2) = 700 KJ` `A +1e^(-) rarr A (DeltaH)_(EG) [A^(+)(g)] =- 350 KJ//mol` `(I.E_(1)+I.E_(2) = 950 KJ//mol)` |
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| 554. |
The correct order of radii is:A. `N lt Be lt B`B. `F^(-) lt O^(2-) lt N^(3-)`C. `Na lt Li lt K`D. `Fe^(3+) lt Fe^(2+) lt Fe^(4+)` |
| Answer» Correct Answer - B | |
| 555. |
Among the following species, how many have their ionic size greater than `O^(2-)`? `Se^(2-),F^(-),N^(3-),P^(3-)` |
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Answer» Correct Answer - `0003` `Se6(2-), N^(3-), P^(3-)` |
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| 556. |
According to Hannay-Smith formula, if E.N difference between A and B is 2.1, then A-B molecule is expected to have x% ionic character, find `(x)/(10)` value to the next integer. |
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Answer» Correct Answer - `005` `(16 xx 2.1 +3.5 xx (2.1)^(2))/(10) = (x)/(10) = 5` |
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| 557. |
Which of the following isoelectronic species has the largest radius?A. `K^(+)`B. `Ca^(2+)`C. `P^(3-)`D. `S^(2-)` |
| Answer» Correct Answer - C | |
| 558. |
Select the correct order of ionic radii.A. `Te^(2-) gt Se^(2-) gt S^(2-) gt O^(2-)`B. `te^(2-) lt Se^(2-) lt S^(2-) lt O^(2-)`C. `Te^(2-) = Se^(2-) gtS^(2-) =O^(2-)`D. None of the above |
| Answer» Correct Answer - A | |
| 559. |
Choose the correct order of atomic/ionic radii.A. `Sc lt Y lt La`B. `Fe lt Co lt Ni`C. `Be^(2+) lt Mg^(2+) lt AI^(3+)`D. `Ti^(+) lt Pb^(2+) lt Bi^(3+)` |
| Answer» Correct Answer - A | |
| 560. |
Among the following find out the total number of d-block elements. `La,Pd,Ni,Cd,Cs,Bi,Sn,Zr,K` |
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Answer» Correct Answer - `005` `La,Pd, N, Cd, Zr` |
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| 561. |
Correct order of radius among the following`F^(-),Al^(3+),Na^(+)` areA. `AI^(3+) = Na^(+) = F^(-)`B. `AI^(3+) gt Na^(+) gt F^(-)`C. `AI^(3+) = Na^(+) gt F^(-)`D. `AI^(3+) lt Na^(+) lt F^(-)` |
| Answer» Correct Answer - D | |
| 562. |
The correct order of radii is:A. `Fe^(+) gt Fe^(3+) gt Fe^(4+)`B. `B gt C gt Li`C. `Mg^(2+) gt AI^(3+) gt Na^(+)`D. `F^(-) gt O^(2-) gt N^(3-)` |
| Answer» Correct Answer - A | |
| 563. |
Which of the following is not d-block elements?A. `Cu`B. `Zn`C. `Fe`D. `Sn` |
| Answer» Correct Answer - D | |
| 564. |
Find the number of transition elements in the following: `Zn, Cd,Hg, Pt, U,Sn` |
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Answer» Correct Answer - `001` Pt only |
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| 565. |
Consider the following 3 elements. `Fe,Cu,ZN` Choose the incorrect option.A. Only 2 are paramagneticB. Number of d-electron: `Fe lt Cu lt Zn`C. All are transition elementsD. All are less metallic than s-block elements of same period |
| Answer» Correct Answer - C | |
| 566. |
Which of the following triads have approximately equal size ?A. `Na^(+) , Mg^(2+) , Al^(3+)` (iso-electronic)B. `F^(-), Ne , O^(2-)` (iso-electronic)C. Fe , Co , NiD. `Mn^(+) , Fe^(2+) , Cr` (iso-electronic) |
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Answer» Correct Answer - C |
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| 567. |
Electron affinity of :A. Carbon is greater than oxygenB. sulphur is lesser than oxygenC. iodine is higher than bromineD. bromine is lesser than chlorine |
| Answer» Correct Answer - D | |
| 568. |
Which of the following is not f-block elements?A. ThB. CeC. LuD. None of these |
| Answer» Correct Answer - D | |
| 569. |
Ionic radii of :A. `Ti^(4+) lt Mn^(7+)`B. `"^(35)Cl^(-) lt ^(37)Cl^(-)`C. `K^(+) gt Cl^(-)`D. `P^(3+) gt P^(5+)` |
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Answer» Correct Answer - D |
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| 570. |
Select equation having exothermic step:A. `S_((g))^(-) to S_((g))^(2-)`B. `O_((g)) to O_((g))^(-)`C. `N_((g)) to N_((g))^(-)`D. `Al_((g))^(2+) to Al_((g))^(3+)` |
| Answer» Correct Answer - B | |
| 571. |
The elements after uranium are called:A. transuranic elementsB. lanthanidesC. transition elementsD. none of the above |
| Answer» Correct Answer - A | |
| 572. |
When the following five anions are arranged in order of decreasing ionic radius , the correct sequence is :A. `Se^(-2) , I^(-) , Br^(-) , O^(2-) , F^(-)`B. `I^(-) , Se^(2-) , O^(2-) , Br^(-) , F^(-)`C. `Se^(-2) , I^(-) , Br^(-) , F^(-) , O^(2-)`D. `I^(-) , Se^(-2) , Br^(-1) , O^(2-) , F^(-)` |
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Answer» Correct Answer - D |
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| 573. |
Which of the following is correct regarding atomic radius?A. `Fe ~~ Co ~~Ni`B. `N ~~ O ~~F`C. `O ~~ S ~~Se`D. `B ~~ AI ~~Ga` |
| Answer» Correct Answer - A | |
| 574. |
Select the incorrect statement regarding LotherMeyer curve:A. alkali metals occupy the peak position of curveB. alkali earth metals are at the ascending part of curveC. halogens are at the ascending part of curveD. atomic volume of an element is not the volume of an atom of that element |
| Answer» Correct Answer - B | |
| 575. |
Which of the following statement is correct regarding following process ? `(i) Cl overset(E.A)to Cl^(-) " " (ii) Cl^(-) overset(I.E.)to Cl` `(iii) Cl overset(I.E)to Cl^(+) " " (iv) Cl^(+) overset(I.E.)to Cl^(2+)`A. |I.E. of process (ii)|=|E.A of process (i)|B. |I.E. of process (iii)|=|E.A of process (ii)|C. |I.E. of process (iv)|=|E.A of process (i)|D. |I.E. of process (iv)|=|E.A of process (iii)| |
| Answer» Correct Answer - A | |
| 576. |
When the following five anions are arranged in order of decreasing ionic radius , the correct sequence is :A. `Se^(2-), I^(-),Br^(-),O^(2-),F^(-)`B. `I^(-),Se^(2-),O^(2-),Br^(-),F^(-)`C. `Se^(2-),I^(-),Br^(-),F^(-),O^(2-)`D. `I^(-),Se^(2-),Br^(-),O^(2-),F^(-)` |
| Answer» Correct Answer - D | |
| 577. |
In which list are the ions arranged in order of increasing size?A. `F^(-) lt S^(2-) lt AI^(3+) lt Mg^(2+)`B. `F^(-) lt S^(2-) lt Mg^(2+) lt AI^(3+)`C. `Mg^(2+) lt F^(-) lt AI^(3+) lt S^(2-)`D. `AI^(3+) lt Mg^(2+) lt F^(-) lt S^(2-)` |
| Answer» Correct Answer - D | |
| 578. |
Which one of the following is correct increasing order of size ?A. `Mg lt Na^(+) lt O^(2-) lt AI`B. `Na^(+) lt AI lt Mg lt O^(2-)`C. `Na^(+) lt O^(2-) lt AI lt Mg`D. `Na^(+) lt O^(2-) lt Mg lt AI` |
| Answer» Correct Answer - B | |
| 579. |
The radii of `N,N^(3-),O` and `O^(2-)` are in the order of:A. `O^(2-) gt N^(3-) gt O gt N`B. `O^(2-) gt N^(3-) gt N gt O`C. `N^(3-) gt O^(2-) gt N gt O`D. `O^(2-) gt O gt N^(3-) gt N` |
| Answer» Correct Answer - C | |
| 580. |
Which of the following statements are correct? (i) Generally the radius trend and the ionisation energy trend across a period are exact opposites. (ii) Electron affinity values of elements may be exothermic (negative ) or endothermic (position) (iii) The first ionisation energy of sulphur is higher than that of phosphorous `Te^(2-) gt I^(-) gt Cs^(+) gt Ba^(2+)` represents the correct decreasing order of ionic radii.A. I,ii and ivB. ii,iii and ivC. I,ii and ivD. I, ii and iii |
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Answer» Correct Answer - C |
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| 581. |
Atomic radii of F & Ne in Angstrom are respectively given by `:`A)`0.72,1.60`B)`1.60,1.60`C)`0.72,0.72`D)`1.60,0.72`A. 0.72, 1.60B. 1.60,1.60C. 0.72, 0.72D. 1.60,0.72 |
| Answer» Correct Answer - A | |
| 582. |
Three elements X, Y and Z have atomic numbers 22, 40 and 72, respectively. Comment on the trend of change in ionisation potential values from X to Y and Y to Z. |
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Answer» The respective elements X,Y and Z are Ti, Zr and Hf. They belong to IVB group of 3d, 4d and 5d series of transition elements, that is, 4th period, 5th period and 6th period. As they belong to same group and the value of ionization potential decreases down the group, the same trend follows from Ti to Zr. However, the IP value of Hf is double to that of Zr. This is because of intervening lanthanide elements that cause lanthanide contraction. As there is no pronounced increase in atomic size due to lanthanide contraction, the increased nuclear charge increases the effective nuclear force of attraction drastically. Thus, there is a drastic a drastic increase in IP value. |
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| 583. |
Among `O,C,F,Cl` and Br the increasing order of atomic radii isA. `F lt O lt C lt Cl lt Br`B. `F lt C lt O lt Cl lt Br`C. `F lt Cl lt Br lt O lt C`D. `C lt O lt F lt Cl lt Br` |
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Answer» Correct Answer - A |
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| 584. |
According to modern periodic law the elements with similar chemical and physical properties repeat at regular intervals when the elements are arranged in order of :A. decreasing atomic numberB. increasing atomic weightC. increasing atomic numberD. decreasing atomic weight |
| Answer» Correct Answer - C | |
| 585. |
The pair of elements that have similar chemical properties areA. Lithium and MagnesiumB. Beryllium and BoronC. Aluminium and MagnesiumD. carbon and Nitrogen |
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Answer» Correct Answer - A |
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| 586. |
The atomic radii of two elements "X" and "Y" are `0.72 A^(0)` and `1.6A^(0)`. Then the elements "X" & "Y" areA. F & NeB. Ne & FC. Li & BeD. Fe & `Fe^(2+)` ion |
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Answer» Correct Answer - A |
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| 587. |
Which element has chemical properties most similar to those of P?A. NB. AIC. SD. As |
| Answer» Correct Answer - D | |
| 588. |
The correct order of atomic radii isA. `Ce gt Sn gt Yb gt Lu`B. `Sn gt Ce gt Lu gt Yb`C. `Lu gt Yb gt Sn gt Ce`D. `Sn gt Yb gt Ce gt Lu` |
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Answer» Correct Answer - A |
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| 589. |
The ionisation energy is lowest forA. NitrogenB. OxygenC. FluorineD. Neon |
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Answer» Correct Answer - B |
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| 590. |
Which list gives nonmetals that are found in their elemental forms in nature?A. neon, phosphorus, flourineB. helium, hydrogen, iodineC. nitrogen, oxygen, sulphurD. oxygen, chlorine, phosphorus |
| Answer» Correct Answer - C | |
| 591. |
Chloride ion and chlorine atom haveA. Same sizeB. same stabilityC. Same nuclear chargeD. Same electron configuration |
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Answer» Correct Answer - C |
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| 592. |
For any atom, the order of ionization potential value isA. `I_(1) lt I_(2) lt I_(3)`B. `I_(1_ gt I_(2) gt I_(3)`C. `I_(1) lt I_(2) gt I_(3)`D. `I_(1) gt I_(2) lt I_(3)` |
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Answer» Correct Answer - A |
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| 593. |
The correct order of ionization values of `Be, B, Li, C` atom isA. `Be lt B lt Li lt C`B. `Li lt Be lt B lt C`C. `Li lt Be gt B lt C`D. `Li gt Be gt B lt C` |
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Answer» Correct Answer - C |
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| 594. |
Which enthalpy is not associated with following change ? Elemental chlorine `rarr` chloride ionA. Bond dissociation enthalpyB. First ionisation enthalpyC. First electron gain enthalpyD. None of the above |
| Answer» Correct Answer - B | |
| 595. |
The high ionistion potential of magnesium compared with aluminium, is due toA. Filled orbitals in magnesiumB. High nuclear charge in magnesiumC. Low radius of magnesium atomD. Low effective nuclear charge in magnesium |
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Answer» Correct Answer - A |
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| 596. |
Which atom has the smallest first ionization energy?A. `Na`B. `K`C. `Mg`D. `Ca` |
| Answer» Correct Answer - B | |
| 597. |
Which of the following is the biggest ion?A. `Al^(3+)`B. `Ba^(2+)`C. `Mg^(2+)`D. `Na^(+)` |
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Answer» Correct Answer - B |
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| 598. |
The element with the following atomic number may be bigger than aluminium atom isA. 12B. 14C. 16D. 17 |
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Answer» Correct Answer - A |
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| 599. |
Second ionization potential value is very low forA. SodiumB. MagnesiumC. FluorineD. Oxygen |
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Answer» Correct Answer - B |
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| 600. |
Which of the following is the smallest cation?A. `Na^(+)`B. `Mg^(2+)`C. `Ca^(2+)`D. `Sc^(3+)` |
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Answer» Correct Answer - B |
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