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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.
| 401. |
Choose the correct order of ionic size:A. `Na^(+) gt Mg^(2+) gt AI^(3+)`B. `Na^(+) lt Mg^(+2) lt AI^(3+)`C. `N^(3-) gt O^(2-) gt F^(-)`D. `Pb^(2+) gt Pb gt Pb^(4+)` |
| Answer» Correct Answer - A::C | |
| 402. |
Which option is correct for atomic radius?A. `Ne gt F`B. `Ar gt CI`C. `F gt Ne`D. `CI gt Ar` |
| Answer» Correct Answer - A::B | |
| 403. |
Which of the following s-block metals has the lowest first ionisation energy?A. MgB. BeC. NaD. Li |
| Answer» Correct Answer - C | |
| 404. |
Diagonal relationsgip is quite pronounced in the elements ofA. `2^(nd)` & `3^(rd)` periodsB. `1^(st)` & `2^(nd)` periodsC. II & III groupsD. `3^(rd)` & `4^(th)` periods |
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Answer» Correct Answer - A |
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| 405. |
If an orbital can have maximum 4 electrons then, how many elements can be present in 8th period?A. 100B. 75C. 128D. 64 |
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Answer» Correct Answer - A [2,8,8,18,18,32,32,50] `rarr (50)/(2) xx 4 = 100` |
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| 406. |
Which of the following is the smallest in size?A. `Br`B. `I^(-)`C. `I`D. `Br^(-)` |
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Answer» Correct Answer - A |
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| 407. |
Degenerate orbital have:A. n sameB. l sameC. m differentD. s different |
| Answer» Correct Answer - A::B::C | |
| 408. |
It each orbital can hold a maximum of three electrons, the number of elements in 9th period of periodic table (long form) are:A. 48B. 162C. 50D. 75 |
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Answer» Correct Answer - D No. of elements `=(50 xx 3)/(2) = 75` |
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| 409. |
Had three electrons been possible to be placed in an orbital, the block of potassium in periodic table would be:A. sB. pC. dD. f |
| Answer» Correct Answer - B | |
| 410. |
Which of the following order of radii is correct?A. `Li lt Be lt Mg`B. `H^(+) lt Li^(+) lt H^(-)`C. `O lt F lt Ne`D. `Na^(+) gt F^(-)gt O^(2-)` |
| Answer» Correct Answer - B | |
| 411. |
Select the correct statement(s).A. The normal oxide formed by the element on extreme left is the most basicB. The tendency of group IA (i.e., 1st group) to form oxygen rich compounds increases from top to bottomC. Oxides of metals are called as basic anhydridesD. In general metallic oxides `(O^(2-))` peroxides `(O_(2)^(2-))` and super oxides `(O_(2)^(-))` are ionic |
| Answer» Correct Answer - A::B::C::D | |
| 412. |
Which of the following is not isoelectronic series?A. `CI^(-),P^(3-), Ar`B. `N^(3-),Ne, Mg^(2+)`C. `B^(3+),He, Li^(+)`D. `N^(3-),S^(2-),CI^(-)` |
| Answer» Correct Answer - D | |
| 413. |
Which of the following order of atomic`//`ionic radius is not correct?A. `I^(-) gt I gt I^(+)`B. `Mg^(2+) gt Na^(+) gt F^(-)`C. `P^(5+) lt P^(3+)`D. `Li gt Be gt B` |
| Answer» Correct Answer - B | |
| 414. |
Which is not correct order for the properties specified ?A. `I gt Br gt CI gt F` (oxidising character)B. `K gt Mg gt AI gt B` (metallic character)C. `Li lt B lt Be lt C lt O lt N lt F lt Ne` (first ionisation enthalpy)D. `Li gt Na gt K gt Rb gt Cs` (chemical reactivity) |
| Answer» Correct Answer - A::C | |
| 415. |
Select equations having endothermic step:A. `S^(-)(g) +e^(-)(g) rarr S^(2-)(g)`B. `Ne(g) +e^(-)(g)rarr Ne^(-)(g)`C. `N(g)+e^(-)(g) rarr N^(-)(g)`D. `AI^(2+)(g) rarr AI^(3+) (g)+e^(-)(g)` |
| Answer» Correct Answer - A::B::C::D | |
| 416. |
The statement that is not correct for the periodic classification of elements is `:`a)The properties of elements are the periodic functions of their atomic numbers.b)non-metallic elements are lesser in number than metallic elements.c)the first ionisation energies of elements along a period do not vary in a regular manner with increase in atomic number.d)for transition elements the `d-` subshells are filled with electrons monotonically with increase in atomic number.A. the properties of elements are the periodic functions of their atomic numbersB. non-metallic elements are lesser in number than metallic elementsC. the third period contains 8 elements and not 18 as 4th period containsD. for transition elements the d-subshells are filled with electrons monotonically with increase in atomic number |
| Answer» Correct Answer - D | |
| 417. |
Which of the following statement is not correct regarding hydrogen atom?A. It resembles halogens in some propertiesB. It resembles alkali metals in some propertiesC. It can be placed in 7th group of periodic tableD. It cannot be placed in first group of periodic table |
| Answer» Correct Answer - D | |
| 418. |
Poor shielding of nuclear charge by d or f-orbital elements is responsible for which of the following facts?A. Atomic radius of Nb (4d -series) is comparable to Ta (5d-series)B. The 1 st ionisation enregy of copper is less than that of zinc.C. The value of electron gain enthalpy is more negative for sulphur than for oxygen.D. The 1 st ionization energy for gold is greater than that of silver. |
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Answer» Correct Answer - A::D |
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| 419. |
Poor shielding of nuclear charge by d or f-orbital elements is responsible for which of the following facts?A. Atomic radius of Nb(4-d series) is comparable to that of Ta(5-d series)B. The 1st ionisation energy of copper is less than that of zincC. The value of electron gain enthalpy is more negative for sulphur than for oxygen.D. The 1st ionisation energy for gold is greater than that of silver. |
| Answer» Correct Answer - A::D | |
| 420. |
The correct order of atomic radii is:A. `Yb^(3+) lt Pm^(3+) lt Ce^(3+) lt la^(3+)`B. `ce^(3+) lt Yb^(3+) lt Pm^(3+) lt La^(3+)`C. `Yb^(3+) lt Pm^(3+) lt La^(3+) lt Ce^(3+)`D. `Pm^(3+) lt La^(3+) lt Ce^(3+) lt Yb^(3+)` |
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Answer» Correct Answer - A |
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| 421. |
Fluorine was discovered very late because of its high reactivity . It is always found in combined state in which it cannot be identified easily . The fact that accompanied with the high reactivity of fluorine isA. Low ionization potentialB. The smallest size amongst halogenC. Low F- F bond-energy & high electronegativityD. The higher ionisation potential |
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Answer» Correct Answer - C |
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| 422. |
Suppose an orbital may accommodate three electrons, then estimate the number of elements in 2nd period:A. 3B. 6C. 8D. 12 |
| Answer» Correct Answer - D | |
| 423. |
The incorrect statement among the following is:A. density increases across the period from left to right while decreases down the groupB. ionization energy depends upon the type of orbital (of same energy level) from which electron is being removedC. generally electron affinity decreases down the groupD. moving diagonally, the charge to size ratio remains nearly same for 2 and 3rd period elements upto 14th group. |
| Answer» Correct Answer - A | |
| 424. |
(a),(b) and (c) are elements in the second short period. Oxide of (a) is ionic, that of (b) is amphoteric and of (c) of gaint molecule. (a),(b) and (c) have atomic number in the order-A. `(A) lt (B) lt (C)`B. `(C) lt (B) lt (A)`C. `(A) lt (C) lt (B) `D. `(B) lt (A) lt (C)` |
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Answer» Correct Answer - A |
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| 425. |
The oxide of which element is the most ionic?A. `AI`B. BC. CD. Si |
| Answer» Correct Answer - A | |
| 426. |
Which forms the most alkaline solution when added to water?A. `AI_(2)O_(3)`B. `B_(2)O_(3)`C. `CO_(2)`D. `SiO_(2)` |
| Answer» Correct Answer - A | |
| 427. |
Which element forms a compound with the formula `H_(3)XO_(4)`?A. `As`B. `CI`C. `N`D. `S` |
| Answer» Correct Answer - A | |
| 428. |
What property of the oxygen atom is represented by the equation `O(g)+e^(-) rarr O^(-)(g)`?A. ElectronegativityB. First electron affinityC. First ionization energyD. Lattice energy |
| Answer» Correct Answer - B | |
| 429. |
Which pair of atomic numbers represent s-block elements?A. 3,12B. 6,12C. 9,17D. 7,15 |
| Answer» Correct Answer - A | |
| 430. |
The order of basic character of given oxides is:A. `Na_(2)O gt MgO gt CuO gt SiO_(2)`B. `MgO gt SiO_(2) gt CuO gt Na_(2)O`C. `SiO_(2) gt MgO gt CuO gt Na_(2)O`D. `CuO gt Na_(2)O gt MgO gt SiO_(2)` |
| Answer» Correct Answer - A | |
| 431. |
Which of the following show amphoteric behaviour?A. `Zn(OH)_(2)`B. BeOC. `Al_(2)O_(3)`D. `Pb(OH)_(2)` |
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Answer» Correct Answer - A::B::C::D |
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| 432. |
Which of the following option is incorrectA. `{:(List-I,List-II),(Ist "Ionisation potential",Na lt Mg lt Si lt P):}`B. `{:(List-I,List-II),("Electron affinity",N lt C lt O lt F lt CI):}`C. `{:(List-I,List-II),("Hydrated radius",Ba^(2+)(aq) lt Sr^(2+)(aq) lt Mg^(2+)(aq)):}`D. `{:(List-I,List-II),("Polarity order",N-H lt Sb -H lt As-H lt P-H):}` |
| Answer» Correct Answer - D | |
| 433. |
The element with atomic numbers 19 isA. HalogenB. ChalcogenC. Noble gasD. An alkali metal |
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Answer» Correct Answer - D |
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| 434. |
Which pair of atomic numbers represent s-block elements?A. 7,15B. 6,12C. 9,17D. 3,12 |
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Answer» Correct Answer - D |
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| 435. |
Select the correct statement.A. E.N. of atom X is 2.5 on Pauling scale if IE of X is `2eV EA` of X is `3eV`B. `|IE` of `X(g)| = |EA` of `X(g)^(-)|`C. `F^(-)(aq) lt CI^(-)(aq) lt Br^(-)(aq) lt I^(-)(aq)` (ionic mobility)D. `Li^(+)(aq) lt Na^(+)(aq) lt K^(+)(aq) lt Rb^(+)(aq)` (size) |
| Answer» Correct Answer - C | |
| 436. |
Select the amphoteric oxide.A. `Na_(2)O`B. `AI_(2)O_(3)`C. `CI_(2)O_(7)`D. `CO` |
| Answer» Correct Answer - B | |
| 437. |
Arrange the following ions in order of their inceasing radii : `Na^(+) , Mg^(2+) , K^(+) , Al^(3+)`A. `Na^(+) gt Al^(3+) gt Mg^(2+) gt K^(+)`B. `Mg^(2+) lt Al^(3+) lt Na^(+) lt K^(+)`C. `Al^(3+) lt Mg^(2+) lt Na^(+) lt K^(+)`D. `Na^(+) lt K^(+) lt Mg^(2+) lt Al^(3+)` |
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Answer» Correct Answer - C |
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| 438. |
Which of the following is neutral oxide?A. `SnO`B. `PbO`C. `PbO_(2)`D. `N_(2)O` |
| Answer» Correct Answer - D | |
| 439. |
Which of the following are neutral oxide?A. `N_(2)O`B. `NO`C. `CO`D. `H_(2)O` |
| Answer» Correct Answer - A::B::C::D | |
| 440. |
In which of the following compound Mn shoes minimum radius ?A. `MnO_(2)`B. `KmNo_(4)`C. `MnO`D. None of these |
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Answer» Correct Answer - 2 As oxidation state of central metal ion increases, the electron to proton ratio, decreases and therefore, size of ion decreases. In `KMnO_(4),Mn` is in `+7 O.S.` So due to maximum `+ve` charge radius will be lowest. |
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| 441. |
The ionisation energy of `A(g)` is similar to in terms of magnitude `-`A. electron affinity of `A^(+)(g)`B. electron affinity of `A(g)`C. ionisation energy of `A^(+)(g)`D. ionisation energy of `A^(2+)(g)` |
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Answer» Correct Answer - 1 `A^(+)+erarrA(g)+EA` It is reverse of `I.E.` of A `|I.E.|=|EA|` |
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| 442. |
Among halogens, the correct order of amount of energy released in electron gain (electron gain enthalpy) is:A. `F gt CI gt Br gt I`B. `F lt CI lt Br lt I`C. `F lt CI gt Br gtI`D. `F lt CI lt Br lt I` |
| Answer» Correct Answer - C | |
| 443. |
The incorrect statement is :A. The formation of `O^(2-)(g)` from `O(g)` is exothermic processB. Phosphorous has more electron affinity than nitrogenC. Ne has larger radius than ND. `|DeltaH_(eg)` of `Na^(o+)| =|I.E.` of `Na|` |
| Answer» Correct Answer - A | |
| 444. |
Which of the following atom has towest negative electron gain enthalpy?A. OB. SC. SeD. Te |
| Answer» Correct Answer - A | |
| 445. |
Which of the following pairs of ions have the same electronic configurationA)`Cr^(+3),Fe^(+3)`B)`Fe^(+3),Mn^(+2)`C)`Fe^(+3),Co^(+3)`D)`Sc^(+3),Cr^(+3)`A. `Cr^(+3),Fe^(+3)`B. `Fe^(+3),Mn^(+2)`C. `Fe^(+3),Co^(+3)`D. `Sc^(+3),Cr^(+3)` |
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Answer» Correct Answer - B |
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| 446. |
Select the incorrect order about halogen.A. `E.A. = CI gt F gt Br gt I`B. `B.E. = CI_(2) gt F_(2) gt Br_(2) gt I_(2)`C. `I.E. = F gt CI gt Br gt I`D. Oxiding strength `= F_(2) gt CI_(2) gt Br_(2) gt I_(2)` |
| Answer» Correct Answer - B | |
| 447. |
Most easily `Fe^(2+)` ions can be produced from Fe atom be absorbing energy from which of the following process. Consider equal no of given species.A. Formation of `O^(-)` from O-atomB. Formation of `F^(-)` from F-atomC. Formation of `CI^(-)` from CI-atomD. Formation of `S^(-)` from S-atom |
| Answer» Correct Answer - C | |
| 448. |
Which of the following process is associated with best possibility of the energy release?A. `Li rarr Li^(+) +e^(-)`B. `O^(-)+e^(-) rarr O^(2-)`C. `CI^(+) +e^(-) rarr CI`D. `Be +e^(-) rarr Be^(-)` |
| Answer» Correct Answer - C | |
| 449. |
The correct order of electron affinity for the different families is:A. Halogen `gt` carbon `gt` nitrogen `gt` oxygenB. Halogen `gt` oxygen `gt` nitrogen `gt` carbonC. Halogen `gt` nitrogen `gt` carbon `gt` oxygenD. Halogen `gt` oxygen `gt` carbon `gt` nitrogen |
| Answer» Correct Answer - D | |
| 450. |
Which of the following statements is correct?A. `Mg^(+2)` has greater ionic radius than `Li^(+)`B. Shielding constant value for us and `3d e^(-)` is same in scandiumC. `H^(-)` is the smallest anion in periodic tableD. F has highest negative `DeltaH_(eg)(I)` |
| Answer» Correct Answer - B | |