InterviewSolution
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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.
| 101. |
which is the symbol for an element whose ground state atoms have the same total numbers of s electrons and p electrons ?A. `_(5)B`B. `_(6)C`C. `_(12)Mg`D. `_(18)Ar` |
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Answer» Correct Answer - c `Mgto 1s^(2)2s^(2)2p^(6)3s^(2)` |
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| 102. |
which of the following is correct set of quantum numbers for the last electron entering in Fe ?A. `{:( n,l,m,s),(4,0,0,+(1)/(2)):}`B. `{:( n,l,m,s),(3,2,-1,+(1)/(2)):}`C. `{:( n,l,m,s),(3,2,-2,-(1)/(2)):}`D. `{:( n,l,m,s),(3,2,-3,-(1)/(2)):}` |
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Answer» Correct Answer - c N/a |
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| 103. |
the possible set of quantum numbers (n,l,m,s) of the last electron of unipositive potassium ion :A. `5,0,0,-(1)/(2)`B. `5,0,1,(1)/(2)`C. `5,1,0,(1)/(2)`D. none of these |
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Answer» Correct Answer - d `""_(19)K^(+) =1s^(2)2s^(2)2p^(6)3s^(2)3p^(3)` (unipostiive potassium ion ) last `e^(-)` goes into 3p subshell So , `n=3,l=1,,0,1,s=+(1)/(2),-(1)/(2)` |
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| 104. |
which set of quantum number si not possible ?A. `n=1,l=1,m_(1)=+1,m_(s)=-(1)/(2)`B. `n=3,l=2,m_(1)=+1,m_(s)=+(1)/(2)`C. `n=4,l=4,m_(1)=-1,m_(s)=+(1)/(2)`D. `n=5,l=2,m_(1)=2,m_(s)=-(1)/(2)` |
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Answer» Correct Answer - c N/a |
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| 105. |
the percentage of orbitals occupied by electrons out to total orbitals present upto the outermost shell of Fe atom :A. 0.5B. 0.7C. 0.25D. 0.35 |
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Answer» Correct Answer - a out of 30 orbital available , 4p ,4d ,4f area unoccpied |
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| 106. |
Aufbau priciple does not give correct arrangmen of filling up of atom orbitals in :A. cu and ZnB. Co and ZnC. Mn and CrD. Cu and Cr |
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Answer» Correct Answer - d N/a |
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| 107. |
The increasing order of specific charge for the following substances electron (e), proton (p) unipositive helium atom (h), neutron (n) and `alpha`-particle is correctly represented in which of the following options.A. `e,n,p,h,alpha`B. `n,h,alpha,p,e`C. `n,alpha,h,p,e`D. None of these |
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Answer» Correct Answer - b `(q)/(m)=`specific chanrge For `e to (e )/(m_(e )) "for " He ^(+) to (e ) /(4xx1840m_(e ) )` For `to (e ) /(1840m_(e ) ) "for " alpha (2e ) /(4xx1840 m_(e ) )` ltbr gt For `nto o` nlt h lt alphalt e. |
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| 108. |
in multielectric atom , maximum number of degeneratye orbitals present in 3rd shell : |
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Answer» Correct Answer - 5 3d subshell has 5 degenerate orbtials. |
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| 109. |
An element has same number od neutrons as total number of protions or electros , what will be the neutron excess ? |
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Answer» A= 2Z A 2Z =0 |
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| 110. |
A certain anion carries `-9.6xx10^(-10)` coulombs fo static electric charge calcualate the number of electrons charges present on it |
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Answer» Correct Answer - 6 `(9.6xx10^(-19))/(1.6xx10^(-19))=6.` |
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| 111. |
Two pure organic compounds melt at `112^(@)`C and `114^(@)C` ,reapectvely ,if equal quantites of them are mixed ,at what temperature will the mixure begin to melt ?A. Below `112^(@)C`B. At `112^(@)C`C. Between `112^(@)C and 114^(@)`D. Above `114^(@)`C |
| Answer» Correct Answer - a | |
| 112. |
Which pair consists of species that are isoelectnicA. `Na^(+)K^(+)`B. `Cl,Cl^(-)`C. `Fe^(2+),Mn^(2+)`D. `Ar,Ca^(2+)` |
| Answer» Correct Answer - d | |
| 113. |
which of the following pair(s) represents (s) the isoeleronts species ?A. `S^(2-) and Sc^(3+)`B. `SO_(2) and NO_(3)^(-)`C. `N_(2) and CN^(-)`D. `NH_(3) and H_(3)O^(+)` |
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Answer» Correct Answer - ab,c,d, N/a |
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| 114. |
Which of the following is iso-electronic with neon-A. `O^(2-)`B. `F^(-)`C. MgD. Na |
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Answer» Correct Answer - a,b N/a |
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| 115. |
Which is true about an electron-(a). rest mass of electron is `9.1xx10^(-28)g`(b). mass of electron increases with the increase in velocity(c). molar mass of electron is `5.48xx10^(-4)g//"mole"`(d). `e//m` of electron is `1.7xx10^(8) "coulomb"//g`A. Rest mass of electron is `9.1 xx10^(-28)`gB. Mass of electron increases with the increase in velocityC. Molar mass of electron is `5.48xx10^(-4)` g/moleD. e/m of electron is `1.7xx10^(8)` coulomb/g |
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Answer» Correct Answer - a,b,c (b) As energy also has mass ,so K.E of `e^(-) uarr ,"mass" uarr ` (c ) molar mass `=6.023 xx10^(23)xx9.1xx10^(-28)` g / mole (d) `e//m =(1.6xx10^(-19))/(9.1xx10^(-28)) c//g` |
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| 116. |
if element `,_(25)X+y` has spain magnetric moment 1.732 B.M then:A. number of unpaired electrons =1B. unmber of unpaired electrons =2C. Y=4D. Y=6 |
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Answer» Correct Answer - a,b,c,d `1s^(2) 2s^(2)2p^(6) 3s^(2) 3p^)6) 3d^(1)` ` implies Y=6` ` n=1` |
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| 117. |
the number of d- electrons in `Mn^(2+)` is equal to that of :A. p- electrons in NB. s- electrons ion NaC. d- electrons in `Fe^(+3)`D. p- electrons in `O_(-2)` |
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Answer» Correct Answer - b,c No . Of d`e^(-) =5` |
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| 118. |
An ion `(Mn^(a+))` has the magnetic moment equal to `4.9` B.M` What is the value of (a) :A. 3B. 4C. 2D. 5 |
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Answer» Correct Answer - a N/a |
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| 119. |
Examine the model of vitamin C and determine the molecular foemula .In the model shown ,the black sphere =Catom o sphere = Hstom ,O sphere =O atom A. `C_(8)H_(6)O_(6)`B. `C_(6)H_(6)O_(6)`C. `C_(6)H_(10)O_(6)`D. None of these |
| Answer» Correct Answer - b | |
| 120. |
the materical used in photoelectric cells sontains ,A. CsB. SiC. SnD. Ti |
| Answer» Correct Answer - a | |
| 121. |
Molten potassium chlorde consucts electricity due th the presence of :A. Free eletronsB. Free moleculesC. Free potassium and chlorine atomsD. Free potassium and choride ions |
| Answer» Correct Answer - d | |
| 122. |
How amny maximum number of eletrons are present in an element (z=35) which have quantum, number values ? `lle2, " "|m|lt2, s=+(1)/(2)`A. 15B. 16C. 18D. 13 |
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Answer» Correct Answer - b l =0.1,2 |
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| 123. |
which set of quantum mumbers (n,l,`._(1),m_(2)`) is not permitted by the rules of quantum mechanics?A. `1,0,0,(1)/(2)`B. `2,1,-1,-(1)/(2)`C. `3,3,1,-(1)/(2)`D. `4,3,2,(1)/(2)` |
| Answer» Correct Answer - c | |
| 124. |
If the principal quantum has a value of `3`, what are the permitted values of the quantum number `l`?A. `2,1,0`B. `3,2,1,0`C. `2,1,0,-1,-2`D. `3,2,1,0,-1,-2,-3` |
| Answer» Correct Answer - d | |