InterviewSolution
Saved Bookmarks
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.
| 51. |
If the mass of proton is doubled and that of neutron is havled th emolecular weight of `CO_(2) ` consisting only isoeletronic series?A. `N^(3-),O^(2-),Cl^(-),Ne`B. `F^(-),Ar,S^(2-),Cl^(-)`C. `P^(3-),S^(2-),Cl^(-),Ar`D. `N^(3-),F^(-),O^(2-),Ar` |
|
Answer» Correct Answer - b `CO_(2)` No, of protons =6+16=22 No, of neutrous =6+16=22 New total mass `=22xx2+(22)/(2)=55` Increases in mass =11 % increase `=(11)/(44)xx100=25%` |
|
| 52. |
The maximum no . Electrons in phosphorous atom for which n+l+m =3 will be :A. 6B. 5C. 4D. 3 |
|
Answer» Correct Answer - b `{:(1s^(2),2s^(2),2p^(6),3s^(2),3p^(3)),(n=1,n=2,n=2,n=3,n=3),(l=0,l=0,l=1,l=0,l=1),(m=0,m=0,m=-1","0","+1,m=0,m=-1","0","+1),(2e^(-)to,n=2,l=1,m=0,""),(2e^(-),n=3,l=0,m=0,""),(1e^(-)to,n=3,l=1,m=-1,""):}` |
|
| 53. |
Am elements si respesented by (A,Z) e.g `NI""_(28)^(60)` can be written as (60,28) Among the following find the total number of possible isotpic pairs formed by the given atoms (232,84),(228,90),(228,90),(214,82),9218,88_, (216,84),9210,84),(213,84) . |
|
Answer» Correct Answer - 5 `{:((232","90),(228","90)implies"pair"),((218","84),(218","88)implies "pair"),((216","84),(210","84),(210","84),(213","84)implies"pairs"(""^(3)C_(2))):}` |
|
| 54. |
the correct increasing order of `(e )/(m)` ratio of the given particles is :A. `Na^(+)ltMg^(2+)ltAl^(3+)`B. `Li^(+)ltNa^(+)lt K^(+)`C. `F^(-)lt Cl^(-)lt Br^(-)`D. `Ca^(2+)ltAl^(3+)lt Be^(2+)` |
|
Answer» Correct Answer - a `(3e)/(27)gt(2e)/(24)gt(e )/(23) ` |
|
| 55. |
The first excited state of `Cl^(-)` will have degenergy of :A. 1B. 3C. 5D. 9 |
|
Answer» Correct Answer - c `e^(-)` is eccited to 3d subshell |
|
| 56. |
`X^(2+)` is isoelectrnic with sulphur and has `(z+2)` neutrons (Z is atomd no of `X^(2+)`) Hence ionic mass of `X^(2+)` isA. 34B. 36C. 38D. 40 |
|
Answer» Correct Answer - c Z=18 A=18 +20 |
|
| 57. |
Each of the following atomic orbitals is possible except :A. 1sB. 2pC. 3fD. 4d |
|
Answer» Correct Answer - c N/a |
|
| 58. |
total number of possible unique sts of gour quantum numbers in the 5th shell of an atom ,if it is complatey filled :A. 20B. 5C. 25D. 50 |
|
Answer» Correct Answer - d No . Of `e^(-)` = 2n^(2)=50 |
|
| 59. |
which must represent an atom in an excited state?A. `1s^(2)2s^(2)2p^(1)`B. `1s^(2)2s^(2)2p^(2)`C. `1s^(2)2s^(2)2p^(2)3s^(1)`D. `1s^(2)2s^(2)2p^(5)` |
|
Answer» Correct Answer - c N/a |
|
| 60. |
which of the following is worng outer electonic configuration ?A. `Sc^(21)=3d^(1)4s^(2)`B. `Ti^(22)=3d^(2)4s^(2)`C. `Cr^(24)=3d^(5)4s^(1)`D. `V^(23)=3d^(2)4d^(2)` |
|
Answer» Correct Answer - d N/a |
|
| 61. |
Many elements have non-integral atomic masses becauseA. they have isotopesB. they isotopes have non-intergral massesC. their isotopes have different massesD. the consitiuents neutrons ,protein and combine to give fractional masses |
|
Answer» Correct Answer - c N/a |
|
| 62. |
Magnetic moment of `_(30)Zn^(2+)` ion is same as :A. `_(29)Cu^(1+)`B. `_(21)Sc^(3+)`C. `_(28)Ni^(4+)`D. (a) and (b) both |
|
Answer» Correct Answer - d N/a |
|
| 63. |
Which of the following having same value of magnetic moment?A. `Mn^(2+)and Na^(+)`B. `Fe^(3+)and Fe^(2+)`C. `Zn^(2+)and Cl`D. `Zn^(2+)and Na^(+)` |
|
Answer» Correct Answer - d N/a |
|
| 64. |
Statement -1:- For n=2 the values of l may be 0,1 and m may be `0,+- 1.` Statement -2 :- for each value of n, there are 0 to (n-1) possible values of l for each value of la there are 0 to `+-` l values of m.A. sattement -1 si true statement -2 is ture statement =-2 si correct explantion for statement -1B. statement -1 si true statement -2 si true statement -2 is not a correct explation for statement -1C. statement -1 si true statemention -1D. statement -1 and statement -2 both are false . |
|
Answer» Correct Answer - a N/a |
|
| 65. |
which of the following statement (s) is (are) correct ?A. the eletronic configation of Cr ois [Ar]3d `4s^(-1)` (Atomic number of Cr=24)B. The magnetirc quantum number may have nagative values .C. In silver atom ,23 electrons ,have a spin of one type and 24 of opposite type (atomic number of Ag=47 ).D. `d_(z^(2))` orbital has total 6 lobes .2 large lobes along Z-axis , while 4 very small lobes in Xy plane . Along X and Y axis |
|
Answer» Correct Answer - a,b,cd N/a |
|
| 66. |
Which of the following statement is//are correct for an electron of quantum numbers `n=4` and `m=2`?A. the value of l may be 2B. the value of l may be `+(1)/(2)`C. the value of s may be 0,1,2D. the values of l may be 0,1,2 |
|
Answer» Correct Answer - abc N/a |
|
| 67. |
Find the number of sets of isosters `(N_(2) ,CO),(N_(2)O,CO_(2)),(HF,OH),(B_(3)N_(3)H_(6),C_(6)H_(6))` |
|
Answer» Correct Answer - 4 All sets have same os such electrons and same number of astoms and same number of `e^(-)` s. |
|
| 68. |
How many jorbitals are in an f sublevel (l=3) ?A. 3B. 5C. 7D. 14 |
| Answer» Correct Answer - c | |
| 69. |
Screening effect is not observed in :A. `He ^(+)`B. `Li^(2+)`C. `Be^(3+)`D. in all cases |
|
Answer» Correct Answer - d N/a |
|
| 70. |
`Z_(eff)` for 4s electron in `_(30)Zn` I s:A. 11.25B. 18.75C. 25.65D. 4.35 |
|
Answer» Correct Answer - b `(1s^(2))(2s^(2)2p^(6))(3s^(2)3p^(6)) (3d^(10))(4s^(2))` `sigma=(2xx1)+(8xx0.85)+(7xx0.35)` `sigma =2+6.8+2.45` `sigma =11.25` ` "Hence " ,Z_("eff")=Z-sigma` |
|
| 71. |
`Z_(eff)` for 4s electron in `_(30)Zn` I s:A. `1.65`B. 4C. 12.85D. 4.35 |
|
Answer» Correct Answer - d `Zn to (1s)^(2)(2s 2p)^(8)(3s 3p)^(8)(3d)^(10)(4s 4p)^(2)` `sigma=1xx0.35+18xx0.85+10xx1.00` =25.65 |
|
| 72. |
if values of quantum number can be considered as follow : n=1,2,3,…….. `oo` l=- to (n+1) m=- l to +l (interfral values incleuding zero ) `s=(1)/(2) ,+(1)/(2)` According to above consideration the maximum number of electrons that can be accomodated in g -orbital of the foruth shell is :A. 18B. 9C. 2D. 22 |
|
Answer» Correct Answer - c any orbital can have maximum `2e^(-)` |
|
| 73. |
which os the electrons confiuration for an Fe (III) ion in its ground state?A. `[Ar] 3d^(5)`B. `[Ar] 3d^(6)`C. `[Ar] 4s^(2)3d^(3)`D. `[Ar] 4s^(2)3d^(6)` |
|
Answer» Correct Answer - a N/a |
|
| 74. |
A sulphur atom in its ground state has the electrons confiuration `1s^(2)2s^(2)2p^(6)3s^(2)3p^(4)` How many orbitals are occpied by at least one electron ?A. 12B. 9C. 8D. 5 |
| Answer» Correct Answer - b | |
| 75. |
imagnine a universe in which : (A) Prinicipal quantum n can have values from 1,2,3,……….`oo`. (b) Azimuthal quantum no. l can have values from 1 to n+1 correspoding to A,B,C,D,E,F,..................(c ) magntriic quantum no m can have interal values from `-(l)/(2) "to " +(l)/(2)` (including zero if possible ). (d) spin quantum no s can have 6 possible values . All rules of filling remains intact . what is the maximum `e^(-)` capcity of a shell for which `n=4`?A. 32B. 96C. 114D. 64 |
|
Answer» Correct Answer - c `4A ,4B ,4C,4D,4E` `n+1=2" "3" "4" "4" "6` ` "total orbital "=19 ` `19xx6=114` |
|
| 76. |
if values of quantum number can be considered as follow : n=1,2,3,…….. `oo` l=- to (n+1) m=- l to +l (interfral values incleuding zero ) `s=(1)/(2) ,+(1)/(2)` According to above consideration the maximum number of electrons associataed with 3rd shell is :A. 50B. 32C. 40D. 60 |
|
Answer» Correct Answer - a n=3, l=0,1,2,3,4, No. of values for l=0`to `1 l=1`to ` 3 ` l=2 to 5` l=3to 5 l=3tio 7 l=4 to 9 ` `therefore "total " e^(-) = 25 xx2 = 50` |
|
| 77. |
Wave function of electrons I natoms arae called atomic orbitals Atoms orbital s are labelled as three quantum number n,l,m. Select invalid set of quantum number for any electrons in ground state electromns configuration of potassium :A. `n=4,l=0,m=0,s=+(1)/(2)`B. `n=3,l=1,m=0,s=+(1)/(2)`C. `n=3,l=2,m=0,s=+(1)/(2)`D. `n=2,l=1,m=-1,s=-(1)/(2)` |
|
Answer» Correct Answer - c `K to 1s^(2)2s^(2)2p^(6)3s^(2) 3p^(6) 4s^(1)` 3d is vacant. |
|
| 78. |
information : (a) prinicipal qunatum no n is defined as 1,2,3,……….. (b) Azimuthal quantum no .l hdefind as 1 to n +2 in integral steps . (c ) magntic quantum no m is defind as `-(1)/(2) "to " +(1)/(2) ` (including zero oif any , in in intergral steps). (d) spin quntum no s has six possible values `(-2,-1,-(1)/(2),+(1)/(2),+1,+2)`. (e ) the subshell corresponding to l=1,2,3,4,5............... designeted as F,GltH,I,J,K.... respectively , (f) the values of m for given values of l give the number of orbitals in a sub-shell . (g) the prionciple for filling of `E^(-)` in the shells remins unchanged . for the elelment having atomic no 43 last `e^(-)` emters in:A. 1GB. 2GC. 2FD. 1H |
|
Answer» Correct Answer - d `1F,1G ,2F ,1H ` 12 + 18 +12=42 |
|
| 79. |
information : (a) prinicipal qunatum no n is defined as 1,2,3,……….. (b) Azimuthal quantum no .l hdefind as 1 to n +2 in integral steps . (c ) magntic quantum no m is defind as `-(1)/(2) "to " +(1)/(2) ` (including zero oif any , in in intergral steps). (d) spin quntum no s has six possible values `(-2,-1,-(1)/(2),+(1)/(2),+1,+2)`. (e ) the subshell corresponding to l=1,2,3,4,5............... designeted as F,GltH,I,J,K.... respectively , (f) the values of m for given values of l give the number of orbitals in a sub-shell . (g) the prionciple for filling of `E^(-)` in the shells remins unchanged . the no fo orbital and maximum no of `e^(-)` that can be filled in a J- subshell respectively will be :A. 6,36B. 5,30C. 4,24D. 7,24 |
|
Answer» Correct Answer - a J l= 5 `m=-(5)/(2),-(3)/(2) ,-(1)/(2),+(1)/(2) , (3)/(2) ,+(5)/(2)` No. of orbitals = 6 No. of `e^(-)= 6xx6=36` |
|
| 80. |
for a hydrothertical atom find out the total number of electrons that arae filled in between 9s and 9p subshell if spin qunatum have `(-(1)/(2),0,+(1)/(2))` there values . |
|
Answer» Correct Answer - 63 9s ,6g,7f ,8d,9p total number of orbital=s filled `=5+7+9=21` total number of electrons filled `=21xx3=63` |
|
| 81. |
The orbital angular momentum for an electron revolving in an orbit is given by `sqrt(l(l + 1))(h)/(2pi)`. What is the momentum of an s-electron?A. `+(1)/(2) ,(h)/(2pi)`B. zeroC. `(h)/(2pi)`D. `sqrt(2)(h)/(2pi)` |
|
Answer» Correct Answer - b N/a |
|
| 82. |
which change(s) in eleectron structure occour when a Mn atom is converted to a `Mn^(2+)` ion in the gas phase ? (P) the number of occupied enrgy levels decreases. (Q ) the number of half -filled orbitals decreases .A. P onlyB. Q onlyC. Both pand QD. Neither p nor Q |
|
Answer» Correct Answer - a N/a |
|
| 83. |
If an elevtronsd has spin quantum number of `=(1)/(2) ` and magnetic quantum number of -1 it cannot be present in:A. f- orbitalB. d- orbittalC. p- orbitalD. s- orbital |
|
Answer» Correct Answer - d N/a |
|
| 84. |
In which of the following set of species have same magnetic nature and some magnetc moment ?A. `Fe^(+3),Cu^(+),Ag^(+)`B. `Co^(+3),Cr^(+3),Ni^(+2)`C. `Cu^(+),Zn^(+2),Cd^(+2)`D. `Mn^(+2),Fe^(+2),As^(+3)` |
|
Answer» Correct Answer - c N/a |
|
| 85. |
How many unpaired electrons are present in a ground state?A. 6B. 4C. 2D. 0 |
|
Answer» Correct Answer - b N/a |
|
| 86. |
In which of the following ,the two species have different value of spin magnetic moment ?A. `Mn^(+2),Fe^(+3)`B. `Cr^(+3),Mn^(+4)`C. `Zn^(+2),Pd`D. `Co^(+2),Cr^(+2)` |
|
Answer» Correct Answer - d N/a |
|
| 87. |
Which gaseous ion has exactly three unpaired electrons?A. `Fe^(3+)`B. `Ni^(2+)`C. `Ti^(+)`D. `V^(2+)` |
|
Answer» Correct Answer - d N/a |
|
| 88. |
The correct set of quantum number for the unpaired electron of chlorine atom is A. `{:(n,l,m),(2,1,0):}`B. `{:(n,l,m),(2,1,+1):}`C. `{:(n,l,m),(3,1,+1):}`D. `{:(n,l,m),(3,0,0):}` |
|
Answer» Correct Answer - c N/a |
|
| 89. |
which set of quantum unmber is not allowed ?A. `{:(n," "l," "m_(l)," "m_(s)),(1," "0," "0," "+(1)/(2)):}`B. `{:(2," "2," "1," "-(1)/(2)):}`C. `{:(3," "1," "1," "-(1)/(2)):}`D. `{:(4," "3," "-3," "+(1)/(2)):}` |
| Answer» Correct Answer - b | |
| 90. |
In which of these options do both consituents of the pair have the same magnetic moment-A. `An^(2+) and Cu^(+)`B. `Co^(2+) and Ni^(2+)`C. `Mn^(4+) and Co^(2+)`D. `Mg^(2+) and Sc^(+)` |
|
Answer» Correct Answer - (a,c) N/a |
|
| 91. |
When alpha particle are sent through a thin metal foil ,most of them go straight through the foil becauseA. alpha particles are much heavier than electronsB. alpha paritcles are positively chargedC. most part of the atom is an empty spaceD. alpha particles move with high speed |
|
Answer» Correct Answer - a,c N/a |
|
| 92. |
the configuration `[Ar]3d^(10)4s^(2)4p^(4)` is simmilar to that of :A. BoronB. oxygenC. sulphurD. aluminium |
|
Answer» Correct Answer - c N/a |
|
| 93. |
Choose the correct configuration among the following :A. `Cr(Z=24)"[Ar]3d^(5)4s^(1)`B. `Cu(Z=29)"[Ar]3d^(10)4s^(1)`C. `Pd(Z=46)"[Kr]4d^(10)5s^(0)`D. `Pt(Z=78)"[Xe]4f^(14)5d^(9)6s^(1)` |
|
Answer» Correct Answer - a,b,c,d N/a |
|
| 94. |
The possible value of `l` and `m` for the last electron in the `Cl^(- )ion` are :A. 1 and 2B. 2 and +1C. 3 and +1D. 1and -1 |
|
Answer» Correct Answer - d N/a |
|
| 95. |
Total number of electrons having `n + l = 3` in `Cr(24)` atom in its ground state is.A. 8B. 10C. 12D. 6 |
|
Answer» Correct Answer - a N/a |
|
| 96. |
The total number of electrons in Cr atom for which m=0:A. 1B. 8C. 12D. 16 |
|
Answer» Correct Answer - c N/a |
|
| 97. |
what is the ground state electronic configuration of a `_(27)` CO atom in the gas phase ?A. `1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)3d^(7)4s^(2)`B. `1s^(2)2s^(2)2p^(6)3s^(6)3d^(9)`C. `1s^(2)2s^(2)2p^(6)3s^(6)3d^(8)4s^(1)`D. `1s^(2)2s^(2)2p^(6)3s^(6)3d^(7)4s^(2)` |
|
Answer» Correct Answer - a N/a |
|
| 98. |
Which element has the following ground state electrons configuration ? A. SeB. AsC. SD. Ge |
|
Answer» Correct Answer - a N/a |
|
| 99. |
Find the shielding constant (a) for the first electron entering into H :A. 0.7B. 1C. 0.35D. 0.3 |
|
Answer» Correct Answer - d N/a |
|
| 100. |
How many maximum electrons can be dessribed by the quantum number n=5,l=2 in a particularatom?A. 2B. 6C. 10D. 14 |
|
Answer» Correct Answer - c l=2 `implies` d- subshell |
|