94420 + Interview Questions in Chemistry in Class 12

1.	Consider the followingstatementandidentifythe incorrect one. (i) Pu belongs tolanthanide series (ii)NDechibits+ 3 , +4 ,+2oxidationstates (III)Actinidecontractionis dueto imperfectshieldingof 4felectrons.
Answer» onlyiii only II I and III I , ii and iii Answer :C

Discussion

2.	Consider the following statement about chirility
Answer» molecule which are NON super imposable on their MIRROR image are CHIRAL. a chiral molecule has simple AXIS of symmetry a carbon atom to which four different groups are attached is a chiral centre a compound whose meleculesare achiral exhibits optical activity Answer :C

Discussion

3.	Consider the following standard reduction potential data to answer the next three questions Half-reactions. E^(@)(V) NO_(3)^(-)+4H^(+)+3e^(-)rarrNO(g)+2H_(2)O(l) 0.955V NO_(3)^(-)+3H^(+)+2e^(-)rarrHNO_(2)+H_(2)O(l) 0.940V O_(2)+4H^(+)+4e^(-)rarr2H_(2)O 1.23V Pt^(2+)+2e^(-)rarrPt 1.18V V^(3+)+e^(-)rarrV^(2+) -0.255V V^(3+)+2e^(-)rarrV -1.20V What is E^(@) for VrarrV^(3+)+3e^(-)?
Answer» 1.38V 0.885V `-0.835V` `-1.38V` ANSWER :B

Discussion

4.	Consider the following standard reduction potentials Fe^(3+)(aq) + e^(-) iff Fe^(3+) (aq) , E^(@) = 0.77 V , H_2O_2(aq) + 2e^(-) iff 2OH^(-)(aq) , E^(@) = 0.88 V For the voltaic cell reaction below , calculatethe Fe^(2+) concentration ( in M) that would be needed to produce a cell potential equal to 0.16 V at25^@ Cwhen [OH^(-)] = 0.1 M , [Fe^(3+)] = 0.5 M and [H_2O_2]= 0.35M 2Fe^(2+)(aq) + H_2O_2(aq) iff 2Fe^(3+) (aq) + 2OH^(-) (aq)
Answer» `0.3 M` `0.6 M` `0.41 M` `0.354 M` Solution :`E_("cell")^(0) = 0-88-0.77 = 0.11 V ` `E=E^(0) + (0.0591)/(2) LOG ""([Fe^(+2)]^(2)[H_2O_2]^(1))/([Fe^(+3)]^(2) xx [OH^(-)]^(2)), 0.16 = 0.11 + (0.0591)/(2) log""[((Fe^(+2))^(2) xx (0.35)^(1))/((0.5)^(2) xx (10^(-1))^(2))]` `[log""([Fe^(+2)]^(2) [0.35])/(0.25 xx 0.01) ] = (0.05 xx 2)/(0.0591) = log""[([Fe^(+2)]^(2)(0.35))/(0.00875)]=1.6920` `([Fe^(+2)]^(2)(0.35))/(0.00875) = 50 , (Fe^(+2)) = SQRT((50 xx 0.000875)/(0.35)) = sqrt((0.04375)/(0.35)) = 0.35355 = 0.354M`

Discussion

5.	Consider the following standard reduction potential data to answer the next three questions Half-reactions. E^(@)(V) NO_(3)^(-)+4H^(+)+3e^(-)rarrNO(g)+2H_(2)O(l) 0.955V NO_(3)^(-)+3H^(+)+2e^(-)rarrHNO_(2)+H_(2)O(l) 0.940V O_(2)+4H^(+)+4e^(-)rarr2H_(2)O 1.23V Pt^(2+)+2e^(-)rarrPt 1.18V V^(3+)+e^(-)rarrV^(2+) -0.255V V^(3+)+2e^(-)rarrV -1.20V Consider the following galvanic cell: V\|V(NO_(3))_(2)(0.01M)\|\|NO_(3)^(-)(0.01).H^(+)\|NO(g) 1.0 atm, Pt. If emf of the above cell is 1.94V, pH of the cathode chamber is closest to
Answer» 0 1 2 3 Answer :d

Discussion

6.	Consider the following standard reduction potential data to answer the next three questions Half-reactions. E^(@)(V) NO_(3)^(-)+4H^(+)+3e^(-)rarrNO(g)+2H_(2)O(l) 0.955V NO_(3)^(-)+3H^(+)+2e^(-)rarrHNO_(2)+H_(2)O(l) 0.940V O_(2)+4H^(+)+4e^(-)rarr2H_(2)O 1.23V Pt^(2+)+2e^(-)rarrPt 1.18V V^(3+)+e^(-)rarrV^(2+) -0.255V V^(3+)+2e^(-)rarrV -1.20V What is the E^(@) of cell? NO(g)+H_(2)O+O_(2)(g)rarrNO_(3)^(-)+H^(+)
Answer» 2.185V `-0.13V` 0.275V 0.625V Answer :C

Discussion

7.	Consider the following species O(Me)_(2), N(SiH_(3))_(3), CO, O(SiH_(3))_(2), CCl_(2)("singlet"), CCl_(3)^(-), H_(4)SiO_(4), OCl_(2), MeNCS. Then calculate the number of species which have (p_(pi)-p_(x)) back bond or (p_(pi)-d_(pi) back bond.
Answer» SOLUTION :In `O(Me)_(2) and MeNCS` BACK BONDING is ABSENT.

Discussion

8.	Consider the following species and find out total number of species which are polar and can act as Lewis acid C Cl_(4),CO_(2),SO_(2),AlCl_(3),HCHO,SO_(3),SiCl_(4),BCl_(3),CF_(4)
Answer» SOLUTION :`SO_(2)HCHO`

Discussion

9.	Consider the following species (1)RCH^+ CH_3 , (2) RCH_2CH_2^+ , (3)RCH_2CH_2O^(+)H_2 In the dehydration of straight chain 1^@ alcohols, the correct sequence of formation of the species involved is
Answer» 2,1 1,2 3,2 2,3 Solution :`RCH_2CH_2OH OVERSET(H^+)to RCH_2CH_2O^(+)H_2 to UNDERSET"PROTONATION"(RCH_2CH_2^+)`

Discussion

10.	Consider the following species (1)o-nitrophenol (2)p-nitrophenol (3)o-bromophenol Intramolecular hydrogen bonding can takes place in
Answer» only 3 1 and 3 only 1 2 and 3 Answer :C

Discussion

11.	Consider the following S_(N^2)j reactions I. RX+Y^(-)toR-Y+X^(-) II. RX+Y^(-)toR-Y^(+)+X^(-) III. RX^(+)+Y^(-)toR-Y+X IV. RX^(+)+YtoR-Y^(+)+X In which reactions there is large increase and large decrease in rate of reaction respectively with increase in polarity of the solvent.
Answer» II and III II and IV I and IV IV and I Solution :For II. TRANSITION state is more stabilised than reactant. For III : Reactants are more stabilised than transition state. HENCE, RATE of reaction is affected accordingly.

Discussion

12.	Consider the following sic changes (i)NO to NO^(+)(ii)O_(2)^(-) to O_(2)^(2-)(iii) O_(2) to O_(2)^(+)(iv)NO^(+) to NO^(-)(v) NO^(+) to NO^(2+)(vi) CO to CO^(+) Then calculate value of "c^(2)-b^(2)-a^(2)", where a, b and c are total number of transformation in which magnetic property will be changed, bond increase and bond order decrease respectively.
Answer» ANSWER :`13`

Discussion

13.	Consider the following solutions of equal concentrations {:(A= NH_(4)Cl,,B = CH_(3)COONa),(C = NH_(4)OH,,D = CH_(3)COOH):} A buffer solution can be obtained by mixing equal volumes of
Answer» C and D A and B A and C C and D Solution :Buffer solution can be OBTAINED : (i) By mixing a weak acid with its salt of a strong base. e.g. `CH_(3)COOH + CH_(3)COONA` (ii) By mixing a weak base with itssaltof a strong acid. e.g. `NH_(4)OH + NH_(4)Cl`.

Discussion

14.	Consider the following sets of quantum numbers: Which of the below setting is not permissible arrangement of electrons in an atom?
Answer» 400`-(1)/(2)` 540`+(1)/(2)` 33-2`-(1)/(2)` 32-3`+(1)/(2)` Solution : For a GIVEN value of .l. the permissible VALUES of .m. are `-I,-(l-l)…0….(l=l),`l Thus , for `l=2`, m can not have a value of -3

Discussion

15.	Consider the following sequences of reactions. Major product would be
Answer» ANSWER :C

Discussion

16.	Consider the following sequence of rections. The end product (B) is
Answer» SOLUTION :N//A

Discussion

17.	Consider the following sequence of reactions. The white solid A is a
Answer» `1`. CHLORIDE `2`.NITRATE `3`. nitrite `d`. bromide Solution :precipitate (WHITE) REAPPEARED due to formation of AgCl

Discussion

18.	Consider the following sequence of reactions The structure of compound C is:
Answer» ANSWER :B

Discussion

19.	Consider the following sequence of reactions. The solution D and the residue E respectively contain
Answer» `Hg_(2), S_(2)O_(3)` and `Hg_(2)S` `PbS_(2)O_(3)` and PbS `[Ag(SO_(2)O_(3))_(2)]^(3-)` and `Ag_(2)S` NONE of these Solution :`[Ag(S_(2)O_(3))_(2)]^(3-)` and `Ag_(2)S`

Discussion

20.	Consider the following sequence of reactions The end product Y has structure :
Answer» ANSWER :B

Discussion

21.	Consider the following sequence of reactions. The change from B to C involves the reaction
Answer» `[Hg(NH_(3))_(4)]^(2)+ 2H^(+) +Cr^(-) to Hg(NH_(2))CI darr +3NH_(4)^(+)` `[Pb(NH_(3))_(4)]^(2+)+4H^(+) +2C^(-) to PbCl_(2) darr +4NH_(4)^(+)` `[Pb(OH)_(4)]^(2-) +4H^(+) +2C^(-) to PbCl_(2) +4H_(2)O` `[Ag(NH_(3))_(2)]^(2+) + 2H^(+) +CL^(-) to AgCl darr +2NH_(4)^(+)` Solution :`[Ag(NH_(3))_(2)]^(+2) + 2H^(+) +Cl^(-) to AgCl darr +2NH_(4)^(+)`

Discussion

22.	Consider the following sequence of reactions Identify the A,B ,C and D
Answer» `-F,-COOH,-COCH_3 , -OCH_2 CH_2 CH_3` `-CHO, - COOH, -COCl , -COCH_2 CH_3` `-Br, COOH, -COCl, - COCH_2 CH_3` `-Br, -COOH, -COCl, - CHO` ANSWER :C

Discussion

23.	Consider the following sequence of reactions : Identify E.
Answer» SOLUTION :

Discussion

24.	Consider the following sequence of reactions: B_(2)O_(3)+CaF_(2)+H_(2)SO_(4) to (A) + (B) + H_(2)O (A)+ LiAlH_(4) to ( C) (g) +(D) + LiF ( C)+H_(2)O underset(Delta)to (D) +H_(2) uarr (D) + Na_(2)CO_(3) to (E) + NaBO_(2) + CO_(2) uarr (E)+NH_(4)Cl to (F) +B_(2)O_(3) + NaCl+ H_(2)O What is the empirical mass of compound (F)?
Answer» SOLUTION :`B_(2)O_(3)+CaF_(2)+H_(2)SO_(4) tounderset((A))(2BF_(3)uarr)+underset((B))(3CaSO_(4))+3H_(2)O` `4BF_(3)+3LiAlH_(4) to underset(( C))(2B_(2)H_(6)uarr)+underset((D))(3AIF_(3))+3LiF` `B_(2)H_(6)+H_(2)Ooverset(Delta)to H_(3)BO_(3)+H_(2)uarr` `overset((C))(H_(3)BO_(3))+Na_(2)CO_(3)to overset((D))(Na_(2)B_(4)O_(7))+NaBO_(2)+CO_(2)` `underset((E))(Na_(2)B_(4)O_(7))+2NH_(4)Cl to underset((F))overset((E))(2(BN)_(x))+B_(2)O_(3)+2NaCl+4H_(2)O` Empirical formula mass of `BN=10.8+14=24.8~~25`

Discussion

25.	Consider the followingsequence of reactions CH_(3) CH = CH_(2) overset (Cl_(2)) underset (700 K) to Aoverset (Na_(2)CO_(3)) underset ( 420 K , 12atm)to B overset ((i) HOCl) underset ((ii) NaOh) to C Compound'C' is
Answer» `overset (CH_(3)CHCOONa) overset (\|) (OH) ` `HOCH_(2) - CH = CH_(2)` `overset (CH_(3)CHCOCl) overset (\|) (OH)` Answer :a

Discussion

26.	Consider the following sequence of reactions: H_(2)C=CH-CH=CH_(2)overset(Br_(2)("1Mole"))underset("CCl"_(4))toA overset("1.KCN(excess)")underset(2.H_(2),Ni)toB. The end product (B) is :
Answer» `H_(2)N-(CH_(2))_(2)-CH=CH-(CH_(2))_(2)-NH_(2)`<BR>`H_(2)N-(CH_(2))_(6)-NH_(2)` `NC-CH_(2)-CH=CH-CH_(2)-CN` `H_(2)C=CH-underset(NH_(2))underset(\|)CH-(CH_(2))_(2)-NH_(2)` Solution :`H_(2)C=CH-CH=CH_(2)overset(Br_(2)(1" mole"))underset("CCl"^(4))toH_(2)underset(Br)underset(\|)C=CH=CH-underset(Br)underset(\|)CH_(2)overset(KCN,H_(2),NI)tounderset("NH"_(2)-NH_(2))underset(\|)("H"_(2)C-CH_(2))-underset("CH"_(2)NH_(2))underset(""\|)(CH_(2)-CH_(2))`

Discussion

27.	Consider the following sequence of reactions B, Identify B :
Answer» ANSWER :B

Discussion

28.	Consider the following sequence of reactions and identify the final product (Y) CH_(3)CH_(2)CH_(2)Br underset("dry ether ") overset(Mg) to X underset("dry ether") overset(CO_(2)//H_(3)O^(+)) to Y
Answer» `CH_(3)CH_(2)COOH` `(CH_(3))_(2)CHCOOH` `CH_(3)CH_(2)CH_(2)CH_(2)COOH` `CH_(3)CH_(2)CH_(2)COOH` Solution :`CH_(3)CH_(2)CH_(2)Br UNDERSET("dry ether") OVERSET(Mg) to CH_(3)CH_(2)CH_(2)MgBr underset("dry ether") overset(CO_(2)//H_(3)O^(+)) to CH_(3)CH_(2)CH_(2)COOH`

Discussion

29.	Consider the following sequence of reactions: A overset(C_(2)H_(5)MgI)to X overset(H^(+)//H_(2)O)to tert - amyl alcohol. The compound A in the above sequence of reactions is
Answer» 2- BUTANONE ACETALDEHYDE Acetone Propanal ANSWER :C

Discussion

30.	Consider the following sequence of reaction: Which of the following is the structure of 'C' ?
Answer» `Cl^(-)OVERSET(+)NH_(3)CH_(2)- COOH` `NH_(2) - CH_(2) - COCl` `C_(6)H_(5)CONH_(2)` Answer :A

Discussion

31.	considerthe followingsequenceof reaction: The productEissame as :
Answer» A B C D ANSWER :B

Discussion

32.	Consider the following sequence of reaction The compound A is:
Answer» ANSWER :B

Discussion

33.	Consider the following sequence of reaction Ph-C-=CHoverset(Hg^(+2))underset(H_(2)SO_(4))rarrAoverset(NaN_(3))underset(H_(2)SO_(4))rarrB(Major) The structure of major product B is:
Answer» ANSWER :C

Discussion

34.	Consider the following sequence of reaction The compound A is:
Answer» ANSWER :C

Discussion

35.	Consider the following sequence of reaction: If electronic configuration of element X is [Ne]3s^(1), then which of the following order is incorrect regarding given enthalpies?
Answer» `\|DeltaH_(4)\|=\|DeltaH_(5)\|` `\|DeltaH_(2)\|gt\|DeltaH_(1)\|` `\|DeltaH_(2)\|gt\|DeltaH_(3)\|` `\|DeltaH_(1)\|=\|DeltaH_(6)\|` Solution :(a) `\|DeltaH_(4)\|=\|DeltaH_(5)\|[(DeltaH_(eg))_(X)=(DeltaH_(IE))_(X^(-))]` (b), (c)`toDeltaH_(3) gt DeltaH_(2) gtDeltaH_(1)`[SUCCESSIVE IE always higher than PREVIOUS IE] (c) `\|DeltaH_(1)\|=\|DeltaH_(6)\|[(DeltaH_(IE))_(X)=(DeltaH_(eg))_(X^(-))]`

Discussion

36.	Consider the following sequence of reaction:
Answer» ANSWER :B

Discussion

37.	Consider the following sequence of reaction: (AAK_MCP_37_NEET_CHE_E37_015_Q01) The final product, D is
Answer» `(AAK_MCP_37_NEET_CHE_E37_015_A01)` ANSWER :C

Discussion

38.	Consider the following sequence of conversion. underset((X))ubrace(2NO+O_(2)) Leftrightarrow underset((Y))(2NO_(2)) underset("heat")overset("cool")Leftrightarrowunderset((Z))(N_(2)O_(4)) X, Y and Z can be described as
Answer» `{:("X","Y","Z"),("COLOURLESS","Brown paramagnetic"," Colourless diamagnetic"):}` `{:("X","Y","Z"),("Brown","Colourless diamagnetic","Brown paramagnetic"):}` `{:("X","Y","Z"),("Colourless","Colourless, paramagnetic","Brown diamagnetic"):}` `{:("X","Y","Z"),("Brown","Brown paramagnetic","Brown diamagnetic"):}` SOLUTION :`{:(underbrace(2NO+O_(2))hArr2NO_(2)overset("Cool")underset("Heat")hArrN_(2)O_(4)),("Colourless""""Brown""""Colourless."),("""gases""""paramagnetic gas"" ""diamagnetic"),("""due to presence of" """solid"),("""and odd ELECTRON"):}`

Discussion

39.	Consider the following sequence of reaction:
Answer» ANSWER :A

Discussion

40.	Consider the following salts: NaCl, HgCl_(2), Hg_(2)Cl_(2), CuCl_(2), CuCl and AgCl, Identify the correct set of insoluble salts in water.
Answer» `Hg_(2)Cl_(2), CUCL, AGCL` `HgCl_(2), CuCl, AgCl` `Hg_(2)Cl_(2), CuCl_(2), AgCl` `Hg_(2)Cl_(2), CuCl, NaCl` Answer :A

Discussion

41.	Consider the following satements for Werner's theory : (P) Ligands are connected to the metal ions by ionic bonds Secondary valencies have directional properties Secondary valencies are non-ionisable of these statements :
Answer» <P>P, Q and R are correct Q and R are correct P and R are correct P and Q are correct ANSWER :B

Discussion

42.	Consider the following salts which one(s) when dissolved in water produces acidic solution. (a)KHSO_(4) , (b) NaCN (c ) NH_(4)Cl , (d) KNO_(3)
Answer» `a` and `B` `b` and `C` `b` and `d` `a` and `c` SOLUTION :`N//A`

Discussion

43.	Consider the following reversible system: A(g)+2B(g)hArrC(g)+2D(g) At equilibrium there are 1.0 mole of A and 2.0 moles of each B, C and D present. If 2.0 moles of B is added so that moles of A and D do not change?
Answer» ANSWER :6

Discussion

44.	Consider the following reversible reaction at equlibrium, 2H_(2)O_((g))hArr2H_(2(g))+O_(2(g)),DeltaH=241.7 kJ Which one of the following changes in conditions will lead to maximum decomposition of H_(2)O_((g))
Answer» Increasing both TEMPERATUE and pressure Decresing temperatue and increasing pressure Increasing temperatue and DECREASING pressure Increasing temperatue at CONSTANT pressure SOLUTION :`DeltaH` is positive so reaction move FORWARD by increase in temperature & value of `Deltan=2-2=+1` is positive so it

Discussion

45.	Consider the following reversible reaction,A(g)+B(g)iffAB(g)The activation energy of the backward reaction exceeds that of the forward reaction by 2RT (in J mol^(-1)). If the pre-exponential factor of the forward reactionis 4 times that of the reverse reaction, the absolute value of DeltaG^(Theta) (in J mol^(-1)) for the reaction at 300 K is _____ (Given : ln (2) = 0.7, RT = 2500 J mol^(-1) at 300 K and G is the Gibbs energy)
Answer» Solution :`A_((g))+B_((g))iffAB_((g))` `E_(ab)-E_(af)=2RT implies DeltaH=-2RT and (A_(f))/(A_(b))=4` `K_(EQ)=((K_(f))/(K_(b)))=(A_(f)e^(-E_(af)//RT))/(A_(b)e^(-E_(ab)//RT))=4(e^(2))` `DeltaG^(@)=-RTln K=-2500xxln(4xxe^(2))=-8500 J//mol` `THEREFORE` Absolute VALUE of `DeltaG^(@)=8500 J//mol`.

Discussion

46.	Consider the following resonation structures of N_(5)^(+) ? Find the number of structures in which bond angle around nitrogen other than the centre nitrogen atom, is not eqyal to 180^(@).
Answer» 3 4 5 6 Solution :Number of structures in which bond angle AROUND nitrogen other than the CENTAL nitrogen atom, is equal to `180^(@)` Number of structures in which bond angle around nitrogen other than the central nitrogen atom, isnot equal to `180^(@)`

Discussion

47.	Consider the following representation based on long form of periodic table. Value of al four quantum number for last electron of element 'X' in their ground state is n=4,l=1,m=1 and s=-(1)/(2) and spin mutiplicity of element 'X' in their ground state is 4. Q. Which of the following statement is incorrect?
Answer» Element P is radioactive Elements B and C have their ALMOST SIMILAR size Element G is more stable in +4 oxidation state Element G has electron with n=4, l=3, m=0 and `s=+(1)/(2)` quantum numbers. Answer :C

Discussion

48.	Consider the following representation based on long form of periodic table. Value of al four quantum number for last electron of element 'X' in their ground state is n=4,l=1,m=1 and s=-(1)/(2) and spin mutiplicity of element 'X' in their ground state is 4. Q. The correct order is:
Answer» Ionisation ENERGY of VGT ionisation energy of U Electron AFFINITY of X GT electron affinity of S Electron affinity of X gt ionisation energy of D `\|DeltaH_(EG)\|` of `T gt \|DeltaH_(EG)\|` of U Answer :D

Discussion

49.	Consider the following representation based on long form of periodic table. Here P, Q< R and S are up, right down the left elements with respect to the central element 'X' respectively. According to above representation the correct mathc is/are
Answer» X-Ge, P-Si, Q,As, R-Sn, S-Ga X-Te, P-Se, Q-I, R-Po, S-Sb X-Sb, P-As, Q-Te, R-Bi, S-Sn X-IN, P-Ga, Q-Sn, R-Tl, S-Cd Answer :A::B::C::D

Discussion

50.	Consider the following representation based on long form of periodic table. Value of al four quantum number for last electron of element 'X' in their ground state is n=4,l=1,m=1 and s=-(1)/(2) and spin mutiplicity of element 'X' in their ground state is 4. Q. Which of the following order is incorrect?
Answer» MAGNETIC moment `U GT V gt A` ATOMIC radius: `E gt X gt T` IONISATION energy `: R gt X gt B` Stability: `F^(3+) lt E^(3+) lt X^(3+)` Answer :D

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

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Consider the following sequence of reactions B, Identify B :

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Consider the following salts: NaCl, HgCl_(2), Hg_(2)Cl_(2), CuCl_(2), CuCl and AgCl, Identify the correct set of insoluble salts in water.

Consider the following satements for Werner's theory : (P) Ligands are connected to the metal ions by ionic bonds Secondary valencies have directional properties Secondary valencies are non-ionisable of these statements :

Consider the following salts which one(s) when dissolved in water produces acidic solution. (a)KHSO_(4) , (b) NaCN (c ) NH_(4)Cl , (d) KNO_(3)

Consider the following reversible system: A(g)+2B(g)hArrC(g)+2D(g) At equilibrium there are 1.0 mole of A and 2.0 moles of each B, C and D present. If 2.0 moles of B is added so that moles of A and D do not change?

Consider the following reversible reaction at equlibrium, 2H_(2)O_((g))hArr2H_(2(g))+O_(2(g)),DeltaH=241.7 kJ Which one of the following changes in conditions will lead to maximum decomposition of H_(2)O_((g))

Consider the following resonation structures of N_(5)^(+) ? Find the number of structures in which bond angle around nitrogen other than the centre nitrogen atom, is not eqyal to 180^(@).

Consider the following representation based on long form of periodic table. Value of al four quantum number for last electron of element 'X' in their ground state is n=4,l=1,m=1 and s=-(1)/(2) and spin mutiplicity of element 'X' in their ground state is 4. Q. The correct order is:

Consider the following representation based on long form of periodic table. Here P, Q< R and S are up, right down the left elements with respect to the central element 'X' respectively. According to above representation the correct mathc is/are