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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.
| 301. |
Atomic number of the inert gas of `7^(th)` period `= 118`. Which is correct IUPAC name of last element of halogen family in 7th period?A. UnunoctiumB. UnunniliumC. UnunenniumD. Ununseptium |
| Answer» Correct Answer - D | |
| 302. |
A monoatomic anion of unit charge contain 45 neutrons and 36 electrons. What is the atomic mass number of element and in which group of periodic table does it lie? Write your answer as 1002 if answer is 10,2. |
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Answer» Correct Answer - `8017` `Z = 35, A = 45 +35 = 80`, Group =17 |
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| 303. |
In which of the following process maximum energy is releasedA)`S_((g))+e^(-) rarr S_((g))^(-)`B)`O_((g))^(-) +e^(-) rarr O_((g))^(-2)`C)`S_((g))^(-)+e^(-) rarr S_((g))^(-2)`A. `O_((g))+e^(-) rarr O_((g))^(-)`B. `S_((g))+e^(-) rarr S_((g))^(-)`C. `O_((g))^(-) +e^(-) rarr O_((g))^(-2)`D. `S_((g))^(-)+e^(-) rarr S_((g))^(-2)` |
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Answer» Correct Answer - B |
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| 304. |
Ionisation energy of atoms A and B are 350 and `250 kcal mol^(-)` respectively. The electron affinities of these atoms are `70 kcal mol^(-1)` and `90 kcal mol^(-1)` respectively then:A. Electron cloud is more attracted by AB. Electron cloud is more attracted by BC. Electronegativity of A is more than BD. Electronegativity of A is less than B |
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Answer» Correct Answer - A::C `E.N_(a) prop 350 +70, E.N_(B) prop 250 +90` `rArr E.N_(A) gt E.N_(B)` |
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| 305. |
The electron affinities of `N,O,S` and CI are such that:A. `N lt O lt S lt Cl`B. `O lt N lt Cl lt S`C. `O= Cl lt N =S`D. `O lt S lt Cl lt N` |
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Answer» Correct Answer - A |
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| 306. |
How many chlorine atoms will be ionised `CI rarr CI^(+) +e^(-1)` by the energy released from the process `CI +e^(-1) rarr CI^(-)` for `6.02 xx 10^(23)` atoms (I.P. for `CI = 1250 kJ mol^(-1)` and `E.A. = 350 kJ "mole"^(-1))` |
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Answer» Correct Answer - `[1.686 xx 10^(23)` atom] `[N_(A) xx E.A = I.P xx n 6.02 xx 10^(23) xx 350 = 1250 xx n]` |
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| 307. |
Calculate the electronegativity of fluorine from the following data: `E_(H-H) = 104.4 kcal mol^(-1), E_(F-F) = 36.6 kcal mol^(-1)` `E_(H-F) = 134.3 kcal mol^(-1), chi_(H) = 2.1` |
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Answer» Correct Answer - `[3.8752]` `[x_(F) - 2.1 = 0.208 sqrt(134.6 - sqrt(104.2 xx 36.3)) x_(F) = 3.87]` |
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| 308. |
Find the incorrect acidic strength order:A. `K_(2)O gt Rb_(2)O gt Cs_(2)O`B. `N_(2)O lt NO_(2) lt N_(2)O_(3)`C. `Li_(2)O lt BeO lt N_(2)O_(5)`D. `CI_(2)O_(7) gt P_(2)O_(5) gt SiO_(2)` |
| Answer» Correct Answer - B | |
| 309. |
The correct order of acidic strength isA. `CI_(2)O_(7) gt SO_(3)gt P_(4)O_(10)`B. `CO_(2) gt N_(2)O_(5) gt SO_(3)`C. `Na_(2)O gt MgO gt AI_(2)O_(3)`D. `K_(2)O gt CaO gt MgO` |
| Answer» Correct Answer - A | |
| 310. |
In which of the following pairs, the first member has higher first ionization energy ?A. `N,O`B. `B,Be`C. `Al,Ga`D. `Cl,F` |
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Answer» Correct Answer - 1 IE, values in`"Kjmol"^(-1)` `(1)N=1402,O=1314" "," "(2)Be=899,B=801` `(3)Al=577,Ga=579" "," "(4)Cl=1255,F=1681` |
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| 311. |
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)` |
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Answer» Correct Answer - B All are isoelectronic species having 10 electrons in each species but different nuclear charge and thus ionic radius `prop (1)/("Nuclear charge")`. So correct order is `_(9)F^(-) lt ._(8)O^(2-) lt ._(7)N^(3-)`. |
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| 312. |
The correct order of radii isA. `N lt Be lt B`B. `F^(-) lt O^(2-) lt N^(3-)`C. `Na lt Li lt K`D. `Fe^(+) lt Fe^(2+) lt Fe^(2+)` |
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Answer» Correct Answer - 2 For isoelectronic species ionic radius `prop(1)/("effective nclear charge")` |
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| 313. |
Whichof the following orders is correct ?A. `F gt N gt C gt Si gt Ga-`non-metallic charaterB. `F gt Cl gt O gt N-` oxidising propertyC. `S gt Se gt Te gt O-`electron affinity valueD. All of these |
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Answer» Correct Answer - 4 `(1)` As electronegativity increases the non`-` metallic character increases as tendency to form anion increases. `(2)` It is bases on their SRP values . (Oxidising power may be cumulative effective of hydration energies,electronegativity, bond disssociation energies and electron gain enthalpies ). `(3)` It depends on various factors like size of atom, nuclear charge, partially filled , half filled and completely filled electrons configuration. |
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| 314. |
Among the following , the number of elements showing only one non-zero oxidation state is: `O,C,F,N,P,Sn,Tl,Na,Ti` |
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Answer» Correct Answer - B Only `Na` & `F` will show one non-zero oxidation state. These are `Na^(+)` & `F^(-). Na^(+)` & `F^(-)`. |
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| 315. |
In which one of the following pairs the radius of the second species is greater than that of first ?A. `Ti^(4+),Mn^(7+)`B. `Na, Mg`C. `Cl^(-),K^(+)`D. `P^(5+),P^(3+)` |
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Answer» Correct Answer - D As oxidation state increases, the radius of the species decreases on account of higher proton to electron ratio. `P^(5+),"no. of proton"=15,"no. of electrons"=10=15//10` `P^(3+),"no. of proton" =15,"no. of electrons"=12=15//12` |
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| 316. |
Which of the following orders is (are) correct for size:A. `AI ~~ Ga`B. `Te^(2-) gt I^(-) gt Cs^(+) gt Ba^(2+)`C. `Cr^(3+) lt Cr^(6+)`D. `Pd ~~ Pt` |
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Answer» Correct Answer - A::B::D (B) Isoelectronic series of ions, all have the xenon electron configuration. Ionic radius `prop (1)/("nuclear charge")` Atomic number : `Te = 52, I = 53, Cs = 55, Ba = 56`. (D) Due to poor shielding of nuclear charge by `4f` electrons. |
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| 317. |
Which of the following pairs of elements show similar set of oxisation state?A. `O^(15),O^(18)`B. `Na,K`C. `C, Be`D. `Zn,Rb` |
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Answer» Correct Answer - A::B `O^(16),O^(18): -2, -1,+1,+2` `Na, K: +1` `{:(C: +4 "to" -4,,Be:+2),(Zn:+2,,Rb:+1):}` |
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| 318. |
Which of the following show non-zero multiple oxidation state?A. `S`B. `O`C. `Zn`D. `H` |
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Answer» Correct Answer - A::B::D `Zn` have only `2+` or zero oxidation state. |
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| 319. |
Which of the following properties among halogens decreases from fluorine to iodine ?A. EelectronegativityB. Electron AffinityC. Ionisation energyD. (1) & (3) both |
| Answer» Correct Answer - D | |
| 320. |
Which of the following is/are correct regarding oxidation state of elements in their compounds:A. All `d`-Block elements show multiple oxidation state.B. All `p`-Block elements show multiple oxidation state.C. All `s`-Block elements show single oxidation state.D. Some of 18 group elements can show multiple oxidation state. |
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Answer» Correct Answer - C::D `1^(st)` group elements show `1+` oxidation state and `2^(nd)` group elements show `2+` oxidation state. |
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| 321. |
Which orbital electrons are known to shield the nuclear charge improperly? Does this enerate some irregularity in properties of elements? |
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Answer» Correct Answer - `d`-and `f`-orbital electrons are known for poor shielding of nuclear charge, because of their scattered structure. This poor shielding generates some irrengularities in properties like atomic radii and ionisation enthalpy of `d`-block element, `f`-block elements and group-13 elements. `d`-and `f`-orbital electrons are known for poor shielding of nuclear charge, because of their scattered structure. This poor shielding generates some irrengularities in properties like atomic radii and ionisation enthalpy of `d`-block element, `f`-block elements and group-13 elements. |
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| 322. |
`Ph^(+)`compounds are very good oxidising agents. Explain. |
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Answer» Correct Answer - `Pb^(4+)` is less stable than `Pb^(2+)` due to inert pair effect. So, `Pb^(4+)` compounds are very good oxidising agents. `Pb^(4+)` is less stable than `Pb^(2+)` due to inert pair effect. So, `Pb^(4+)` compounds are very good oxidising agents. |
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| 323. |
Explain why callions are smaller and anions larger in radii than their parent atoms? |
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Answer» Correct Answer - The ionic radius of a cation is always smaller than the parent atom because the loss of one or more electrons increases the effective nuclear charge `(Z_(eff))`. As a result, the force of attraction of nucleus for the remaining electrons increases and hence the electron cloud contracts and ionic radii decreases. In contrast, the ionic radius of an anion is always larger than its parent atom because the addition of one or more electrons decreases the effective nuclear charge `(Z_(eff))`. As a result, the force of attraction of the nucleus for the remaining electrons decreases and hence electron cloud expands and the ionic radii increases. The ionic radius of a cation is always smaller than the parent atom because the loss of one or more electrons increases the effective nuclear charge `(Z_(eff))`. As a result, the force of attraction of nucleus for the remaining electrons increases and hence the electron cloud contracts and ionic radii decreases. In contrast, the ionic radius of an anion is always larger than its parent atom because the addition of one or more electrons decreases the effective nuclear charge `(Z_(eff))`. As a result, the force of attraction of the nucleus for the remaining electrons decreases and hence electron cloud expands and the ionic radii increases. |
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| 324. |
Which one of the following statements is incorrect ?A. Greater is nuclear charge, greater is the electron gain enthalpyB. Nitrogen has almost zero electron affinityC. Electron gain enthalpy decreases from fluorine to iodine in the groupD. Chlorine has highest electron gain enthalpy |
| Answer» Correct Answer - C | |
| 325. |
In which pair the first atom or ion is not larger than the second :-A. N,FB. `Cl^(-),Cl`C. `O,S`D. `Fe^(2+),Fe^(3+)` |
| Answer» Correct Answer - C | |
| 326. |
Consider the following statements: I. The radius of an anion is larger than that of parent atom II. The I.E. increases from left to right in a period generally III. The electronegativity of an element is the tendency of an isolated atom to attract an electron The Correct statements are-A. I aloneB. II aloneC. I and IID. II and III |
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Answer» Correct Answer - C [After the removal of one electron `Cr` acquire half filled stable d-orbital configuration] |
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| 327. |
In which of the following pairs, the first atom is larger than the second ?A. `Br, CI`B. `Na,Mg`C. `Sr,Ca`D. `N,P` |
| Answer» Correct Answer - A::B::C | |
| 328. |
The correct order of radii is:A. `N lt Be lt B`B. `F^(-) lt O^(2-) lt N^(3-)`C. `Na gt Li lt K`D. `Fe^(2+) gt Fe^(3+) gt Fe^(4+)` |
| Answer» Correct Answer - B::C::D | |
| 329. |
Choose the correct statement.A. Be and AI are not in same groupB. All the transition metals correspond to d-blockC. Be and AI are having lot of similarities in their propertiesD. The atomic radius gradually decreases from Sc to Zn. |
| Answer» Correct Answer - A::B::C | |
| 330. |
Which of the following pair of elements are not of same group of periodic table?A. `Li, Na`B. `Be, B`C. `N, As`D. `O,At` |
| Answer» Correct Answer - B::D | |
| 331. |
The order in which the following oxides are arranged according to decreasing basic nature isA. `CuO, Na_(2)O, MgO, Al_(2)O_(3)`B. `Al_(2)O_(3), MgO, CuO, Na_(2)O`C. `MgO, Al_(2)O_(3), CuO, Na_(2)O`D. `Na_(2)O, MgO, Al_(2)O_(3), CuO` |
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Answer» Correct Answer - D |
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| 332. |
Which of the following pair has both members from the same group of the periodic table?A. `Na -Ca`B. `Na - Cl`C. `Ca - Cl`D. `Cl - Br` |
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Answer» Correct Answer - D |
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| 333. |
Which one of the following order represents the correct sequence of the increasing basic nature of the given oxides?A. `K_(2)O lt Na_(2)O lt Al_(2)O_(3) lt MgO`B. `MgO lt K_(2)O lt Al_(2)O_(3) lt Na_(2)O`C. `Na_(2)O lt K_(2)O lt MgO lt Al_(2)O`D. `Al_(3)O_(3) lt MgO lt Na_(2)O lt K_(2)O` |
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Answer» Correct Answer - D |
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| 334. |
The increasing order of acidic nature of the following oxides isA. `SiO_(2) lt P_(2)P_(5) lt Cl_(2) O_(7) lt SO_(3)`B. `SiO_(2) lt P_(2)P_(5) lt SO_(3) lt Cl_(2) O_(7)`C. `Cl_(2)O_(7) lt SO_(3) lt P_(2)P_(5) lt SiO_(2)`D. `SO_(3) lt Cl_(2)O_(7) lt SiO_(2) lt P_(2) O_(5)` |
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Answer» Correct Answer - B |
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| 335. |
Which of the following is the most acidic in nature?A. `SiO_(2)`B. `P_(4)O_(10)`C. `CO_(2)`D. `SO_(3)` |
| Answer» Correct Answer - D | |
| 336. |
Which of the following oxides is amphoteric in nature?A. `CaO`B. `CO_(2)`C. `SiO_(2)`D. `SnO_(2)` |
| Answer» Correct Answer - D | |
| 337. |
The order of basic strength of given oxide:A. `Na_(2)O gt MgO gt AI_(2)O_(3) gt CuO`B. `MgO gt AI_(2)O_(3) gt CuO gt Na_(2)O`C. `AI_(2)O_(3) gt MgO gt CuO gt Na_(2)O`D. `CuO gt Na_(2)O gt MgO gt AI_(2)O_(3)` |
| Answer» Correct Answer - A | |
| 338. |
Mercury is the only metal which is liquid at `0^(@) C `. This is due to itsA. Very high ionisation energy and weak metallic bondB. Low ionisation potential and high electronegativityC. High atomic mass and small sizeD. High electronegativity and low ionisation potential |
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Answer» Correct Answer - A |
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| 339. |
Which one of the following is an amphoteric oxide?A. `ZnO`B. `Na_(2)O`C. `SO_(2)`D. `B_(2)O_(3)` |
| Answer» Correct Answer - A | |
| 340. |
Which is an amphoteric oxides?A. `BeO`B. `SnO`C. `ZnO`D. All of these |
| Answer» Correct Answer - D | |
| 341. |
Which of the following is an amphoteric oxide?A. `CO`B. `NO`C. `BeO`D. `N_(2)O_(3)` |
| Answer» Correct Answer - C | |
| 342. |
Which is the correct order of ionisation energies ?A. `F^(-) gt F gt Cl^(-) gt Cl`B. `F gt F^(-) gt Cl gt Cl^(-)`C. `F gt F^(-) gt Cl^(-) gt Cl`D. `F^(-) gt F gt Cl gt Cl^(-)` |
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Answer» Correct Answer - A |
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| 343. |
Which of the following statements is/are true for the long form of the periodic table?A. it reflects the sequence of filling the electrons in the order of sub energy level, s,p,d and fB. it helps to predict the stable valency states of the elementsC. it reflects trends in physical and chemical properties of elementsD. it helps to predict the relative ionicity of the bond between any two elements |
| Answer» Correct Answer - A::B::C | |
| 344. |
Amphoteric behaviour is shown by the oxide of:A. AI and CaB. Pb and BaC. Cr and MgD. Sn and Zn |
| Answer» Correct Answer - D | |
| 345. |
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 potentialA. 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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| 346. |
Aqueous solution of two compounds `M_(1) - O - H and M_(2) - O - H` are prepared in two different beakers . If electronegativity of `M_(1) = 3.4, M_(2) = 1.2, 0 = 3.5 and H = 2.1`, then the nature of two solution will be respectivelyA. acidix, basicB. acidic, acidicC. basic, acidicD. basic, basic |
| Answer» Correct Answer - A | |
| 347. |
Which of the following statements is/are true about the modern form of periodic table?A. Properties of the elements are the periodic functions of their atomic numberB. There are 7 periodsC. There are 8 groupsD. It has separate positions for the isotopes |
| Answer» Correct Answer - A::B | |
| 348. |
The factors that influence the ionisation energies are:A. the size of the atomB. the charge on the nucleusC. how effectively the inner electron shell screen the nuclear chargeD. stability of electronic configuration |
| Answer» Correct Answer - A::B::C::D | |
| 349. |
Aqueous solution of two compounds `M_(1) - O - H and M_(2) - O - H` are prepared in two different beakers . If electronegativity of `M_(1) = 3.4, M_(2) = 1.2, 0 = 3.5 and H = 2.1`, then the nature of two solution will be respectivelyA. Acidic , basicB. Acidic , acidicC. Basic , acidicD. Basic , basic |
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Answer» Correct Answer - A |
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| 350. |
Successive ionisation potentials of an element M are `8.3,25.1,37.9,259.3` and 340.1 ev. The formula of its bromide isA. `MBr_(5)`B. `MBr_(4)`C. `MBr_(3)`D. `MBr_(2)` |
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Answer» Correct Answer - C |
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