Explore topic-wise InterviewSolutions in Current Affairs.

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1.

Column -I Colmun -II (A) Sucrose overset(H_3O^(oplus)) (to) (P) Product is glucose + Fructose (B) Maltose overset(H_3O^(oplus)) (to) (Q) Product is 2 Glucose (C ) Lactose overset(H_3O^(oplus)) (to) (R ) Product is Glucose + Galactose (S) Oligo saccharides

Answer»

SOLUTION :A-PS, B-QS, C-RS
Discussion
2.

Column-I and Column-II contains four entries each. Entries of Column-I are to be matched with some entries of Column-II One or more than one entries of Column-I may have the matching with the same entries of Column-II.

Answer»


ANSWER :D
Discussion
3.

Column-I and Column-II contains four entries each. Entries of Column-I are to be matched with some entries of Column-II. Each entry of Column-I may have the matching with one or more than one entries of Column-II

Answer»


ANSWER :A::B::C::D
Discussion
4.

Column-I and Column-II contains four entries each. Entries of column-I are to be matched with some entries of column-II. Each entry of column-I may have the matching with one or more than one entries of column-II.

Answer»


ANSWER :A::B::C::D
Discussion
5.

Column-I and Column-II contains four entries each. Entries of column-I are to be matched with some entries of column-II. Each entry of column-I may have the matching with one or more than one entries of column-II.

Answer»


ANSWER :A::B::C::D
Discussion
6.

Column-I and Column-II contains four entries each. Entries of column-I are to be matched with some entries of column-II. Each entry of column-I may have the matching with one or more than one entries of column-II.

Answer»


ANSWER :A::B::C::D
Discussion
7.

Column-I and Column-II contains four entries each. Entries of column-I are to be matched with some entries of column-II. Each entry of column-I may have the matching with one or more than one entries of column-II.

Answer»


SOLUTION :Poling : Impure molten metal is stirred with green wood poles, oxide impurities are removed, mainly used for Cu and Sn.
Cupellation is used when impurities are of other metals, mainly used for silver.
Electro-refining : Cu,Ag,Au,Cr,Zn,Ni,etc., are mainly purified by removing insoluble impurities as ANODE MUD.
van Arkel method : (VAPOUR phase refining) Metals like titanium, ZIRCONIUM, thorium and uranium are purified by this method.
Discussion
8.

Column-I and Column-II contains four entries each. Entries of column-I are to be matched with some entries of column-II. Each entry of column-I may have the matching with one or more than one entries of column-II.

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Solution :Cuprite `Cu_(2)O` (OXIDE ore)
CERUSSITE `PbCO_(3)` (carbonate ore)
Kainite `KCl. MgSO_(4). 3H_(2)O` (chloride and sulphate ore)
CALAMINE `ZnCO_(3)` (carbonate ore)
Discussion
9.

Column-I and Column-II contains four entries each. Entries of column-I are to be matched with some entries of column-II. Each entry of column-I may have the matching with one or more than one entries of column-II.

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Solution :ilmenite `FeTiO_(3) or FeO. TiO_(2)`
Dolomite `CaCO_(3). MgCO_(3)`
Carnaollitge `KCL. MgCl_(2).6H_(2)O`
Chromite `FeCr_(2)O_(4) or FeO. Cr_(2)O_(3)`
Discussion
10.

Column-I and Column-II contains four entries each. Entries of column-I are to be matched with some entries of column-II. Each entry of column-I may have the matching with one or more than one entries of column-II.

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ANSWER :A::B::C::D
Discussion
11.

Column-I and Column-II contains four entries each. Entries of column-I are to be matched with some entries of column-II. Each entry of column-I may have the matching with one or more than one entries of column-II.

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ANSWER :A::B::C::D
Discussion
12.

Column-I and Column-II contains four entries each. Entries of column-I are to be matched with some entries of column-II. Each entry of column-I may have the matching with one or more than one entries of column-II.

Answer»


ANSWER :A::B::C::D
Discussion
13.

Column-I and Column-II contains four entries each. Entries of column-I are to be matched with some entries of column-II. Each entry of column-I may have the matching with one or more than one entries of column-II.

Answer»


ANSWER :A::B::C::D
Discussion
14.

Column-I and Column-II contains four entries each. Entries of Column -I are to be matched with some entries of Column-II. One or more than one entries of Column-I may have the matching with the same entries of Column-II.

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Solution :`NH_(2)^(o+)` HYBRIDISATION `SP^(3)` V-shaped (2-bp, 2-lp)
`XeOF_(4)``sp^(3)d`T-shaped (3-bp, 2lp)
`ICl_(4)^(-)``sp^(3)d^(2)`square planar (4-bp, 2-lp)
`[SbF_(5)]^(-)``sp^(3)d^(2)`square pyramidal(5-bp, 1lp)
Discussion
15.

Column-I and Column-II contains four entries each. Entries of Column -I are to be matched with some entries of Column-II. One or more than one entries of Column-I may have the matching with the same entries of Column-II.

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SOLUTION :
Discussion
16.

Column-I and Column-II contains four entries each. Entries of Column -I are to be matched with some entries of Column-II. One or more than one entries of Column-I may have the matching with the same entries of Column-II.

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SOLUTION :
Discussion
17.

Column-I and Column-II contains four entries each. Entries of Column -I are to be matched with some entries of Column-II. One or more than one entries of Column-I may have the matching with the same entries of Column-II.

Answer»


ANSWER :A::B::C::D
Discussion
18.

Column-I and Column-II contains four entries each. Entries of Column -I are to be matched with some entries of Column-II. One or more than one entries of Column-I may have the matching with the same entries of Column-II.

Answer»


ANSWER :A::B::C::D
Discussion
19.

Column-I and Column-II contains four entries each. Entries of Column -I are to be matched with some entries of Column-II. One or more than one entries of Column-I may have the matching with the same entries of Column-II.

Answer»


ANSWER :A::B::C
Discussion
20.

Column-I and Column-II contains four entries each. Entries of Column -I are to be matched with some entries of Column-II. One or more than one entries of Column-I may have the matching with the same entries of Column-II.

Answer»


ANSWER :A::B::C::D
Discussion
21.

Column-I and Column-II contains four entries each. Entries of Column -I are to be matched with some entries of Column-II. One or more than one entries of Column-I may have the matching with the same entries of Column-II.

Answer»


ANSWER :A::B::C::D
Discussion
22.

Column-I and Column-II contains four entries each. Entries of Column -I are to be matched with some entries of Column-II. One or more than one entries of Column-I may have the matching with the same entries of Column-II.

Answer»


Solution :(a)
`to` upaired DISTRIBUTION of s-character in HYBRID orbitals
`to angleCl-O-Cgt109^(@)28.`
`to` Both `O-C` bondsare equivalent.
(B)
`to` unequal distribution of s-character in hybrid orbitals
`to angleHNHlt109^(@)28.`
`to` All three `N-H` BONDS are equivalent
(c)
`to` Equal distribution of s-character in hybrid orbitals
`to angleBr-P-B^(+)=109^(@)28.`
`to` All `P-Br` bonds are equivalent
(d)
`to` Equal distribution of s-character in all hybrid ORBITAL
`to angle O-Xe-O=90^(@)`
`to` All `Xe-O` bonds are equivalent
Discussion
23.

Column-I and Column-II contains four entries each. Entries of Column -I are to be matched with some entries of Column-II. One or more than one entries of Column-I may have the matching with the same entries of Column-II.

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Solution :`implies`
`to2p_(PI)-3d_(pi)` back bond
`to` can exhibit intermolecular H-bonding as H-atom is BOUND in O-atom.
`to` PROTON donor acid: basicity=4
`implies`
`to` back is absent.
`to`can FORM intermolecular H-bonding as H-atom is directly bounded to O-atom
`to`Proton donor acid, basicity=2
`to` Hypervalent, Number of `e^(-)` at Se=12
`implies`
`to2p_(pi)-2d_(pi)` back bond of present
`to`Hypervalent as number of `e^(-)s` atj B-atom=6
`to` does not fornish `H^(+)`
`implies`
`to2p_(pi)-2d_(pi)` back bond is present
`to` can form intermolecular H-bonding as H-atom is directly bonded to N-atom hypervalent number of `e^(-)s` B-atom=6
`to` Does not furnish `H^(+)`
Discussion
24.

Column-I and Column-II contains four entries each. Entries of Column -I are to be matched with some entries of Column-II. One or more than one entries of Column-I may have the matching with the same entries of Column-II.

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SOLUTION :(a)`3I_(2) to I_(3)^(+) +I_(3)^(-)`

(b) `B(OH)_(3)+OH^(-) to B(OH)_(4)^(-)`
`to` hybridization of B: `sp^(3)`
`to` Non-polar
(c) `BA^(2+)SO_(4)^(2-)`
Hyrbridization of S, `sp^(3)`
Non-polar
`ppi-dpi` bonds =2
(d)` MgO implies SO_(2)` : covalent
Hybridization of `S, sp^(2)`
Planar
`ppi-dpi` bonds =1
Discussion
25.

Column-I and Column-II contains four entries each. Entries of Column -I are to be matched with some entries of Column-II. One or more than one entries of Column-I may have the matching with the same entries of Column-II.

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Solution :
`toSi-O-Si=144^(@)`
`to`Hybridization of O-atom changed to `sp^(2)`
`to` In `2p_(pi)-3d_(pi)` back bonding non-axial d-orbital of `t_(2g)` is used
`to`Electron density at O-atom decrease
(b)
`toangleCl-O-Cl` increase due to back bonding and steric repulsion between both Cl-atoms
`to` Hybridization of C remains `sp^(2)`
`to` Electron density increase at central C-atom.
(c)
`to` Electron density at Si-atom increase due to `2p_(pi)-3d_(pi)` back bonding
`to` Non-axial d-orbital of `t_(2g)` set of orbitals is involved in back bonding
`to` All `O-Si-O` remains at `109^(@)28.` because all FOUR substituents are same
(d)
`to` hybridization of central does not change.
`to` Electron density at B-atom increase
`to` All `N-B-N` remain same as all three substituentare same.
Discussion
26.

Column-I and Column-II contains four entries each. Entries of Column -I are to be matched with some entries of Column-II. One or more than one entries of Column-I may have the matching with the same entries of Column-II.

Answer»


Solution :M.O configuration for molecules having total number electron LESS or equal to 14
`sigma1sltoverset("*")(sigma)1sltsigma2sltoverset("*")(sigma)2sltunderset(pi2p_(y))(pi2p_(x))ltpi2p_(Z)ltunderset(overset("*")(PI)2p_(y))(overset("*")(pi)2p_(x))ltoverset("*")(pi)2p_(z)`For molecules havingtotal number of `E^(-)` s greater than 14`sigma1sltoverset("*")(sigma)1sltsigma2sltoverset("*")(sigma)2sltunderset(pi2p_(y))(sigma2p_(x))ltpi2p_(z)ltunderset(overset("*")(pi)2p_(y))(overset("*")(pi)2p_(x))ltoverset("*")(sigma)2p_(z)`
Discussion
27.

Column-I and Column -II contains four entries each. Entries of Column-I are to be matched with some entries of Column-II. One or more than one entries of Column-I may have the matching with the same entries of Column-II.

Answer»


SOLUTION :
Discussion
28.

Column-I and Column -II contains four entries each. Entries of Column-I are to be matched with some entries of Column-II. One or more than one entries of Column-I may have the matching with the same entries of Column-II.

Answer»


SOLUTION :
`sp^(3)d^(3)` hybridisation `(s+p_(X)+p_(y)+p_(Z)+d_(x^(2)-y^(2))+d_(z^(2))+d_(xy))`, d-orbital with zero nodal
PLANE `(d_(z^(2)))` and non-axial d-orbital `(d_(xy))` used in hybridisation.
PLANAR.
Bond angle, `72^(@)`
Discussion
29.

Column-I and Column -II contains four entries each. Entries of Column-I are to be matched with some entries of Column-II. One or more than one entries of Column-I may have the matching with the same entries of Column-II.

Answer»


SOLUTION :
Discussion
30.

Column-I and Column -II contains four entries each. Entries of Column-I are to be matched with some entries of Column-II. One or more than one entries of Column-I may have the matching with the same entries of Column-II.

Answer»


SOLUTION :
Discussion
31.

Column-I and Column -II contains four entries each. Entries of Column-I are to be matched with some entries of Column-II. One or more than one entries of Column-I may have the matching with the same entries of Column-II.

Answer»


SOLUTION :
Discussion
32.

Column-I and Column -II contains four entries each. Entries of Column-I are to be matched with some entries of Column-II. One or more than one entries of Column-I may have the matching with the same entries of Column-II.

Answer»


ANSWER :A::B::C::D
Discussion
33.

Column-I and Column -II contains four entries each. Entries of Column-I are to be matched with some entries of Column-II. One or more than one entries of Column-I may have the matching with the same entries of Column-II.

Answer»


SOLUTION :
Discussion
34.

Column-I and Column -II contains four entries each. Entries of Column-I are to be matched with some entries of Column-II. One or more than one entries of Column-I may have the matching with the same entries of Column-II.

Answer»


ANSWER :A::B::C::D
Discussion
35.

Column-I and Column -II contains four entries each. Entries of Column-I are to be matched with some entries of Column-II. One or more than one entries of Column-I may have the matching with the same entries of Column-II.

Answer»


Solution :
`to` PLANAR as both B and N are `SP^(2)`-hybridized
`to mu_(o)=0` (non-polar)
`to` has `2p_(pi)-2p_(pi)` back bonding between B-N BOND.
`to` has no co-ordinate bond
Discussion
36.

Column-I and Column -II contains four entries each. Entries of Column-I are to be matched with some entries of Column-II. One or more than one entries of Column-I may have the matching with the same entries of Column-II.

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ANSWER :A::B::C::D
Discussion
37.

Column - I (A) Oxidation of 1^@ alcohol in aldehyde Oxidation of alkyne into acid Column-II (P) KMnO_4 , Delta, overeset(Theta)(OH) (Q) Collin’s reagent(R ) Jone’s reagent (S) PCC

Answer»


ANSWER :(A)-Q,R,S;(B)-S;(C )-Q;(D)-P
Discussion
38.

Column I (A) K_(p) lt K_(c) (B) Introduction (C) K_(P)^(0) is dimensionless (D) Temperature increase Column II (P)N_(2)+3H_(2)hArr2NH_(3) (Q) PCl_(5)(g)hArrPCl_(3)(g) + Cl_(2)(g) of inert gas at pressure will decrease the constant concentration of reactants. (R) 2NO_(2)(g)hArrN_(2)O_(4)(g) (S) NH_(3)(g) + HI (g)hArrwill shift the reaction NH_(4)I (s) on product side

Answer»


ANSWER :(A) `to` P,R,S; (B) `to` P,Q,R,S; (C) `to` P,Q,R,S ; (D) `to` Q
Discussion
39.

Column- I (A) Identification of 1^@, 2^@ and 3^@ alcohol (B) Identification of 1^@, 2^@ and 3^@ Nitroalkane (C) Formation of alcohol by anti-Markownikoff’s addition (D) Formation of alcohol by Markownikoff’s addition Column-II (P) Oxymercuration demercuration react (Q) prop// 300^@C, Delta (R) Victor Meyer test (S) Hydroboration oxidation (T) Lucas test

Answer»


ANSWER :(A)-Q,R,T;(B)-R;( C) -S; (D) -P
Discussion
40.

Column-I (A) Electron moving in 2nd orbit in He ^(+) electron is (B) Electron moving in 3 ^(rd) orbit in H-atom (C ) Electron moving in 1 ^(st) orbit in Li ^(+2) ion (D) Electron moving in 2 ^(nd) orbit in Be^(+3) ion Column-II (P) Radius of orbit in which moving is 0.529Å (Q) Total enrgy of electron is (-) 13.6 xx 9 eV (R) Velocity of electronis (2. 188 xx 10 ^(6))/(3)m//s (S) De-broglie wavelength of electron is sqrt((150)/(13.6))Å

Answer»


ANSWER :`A-s;B-r;C-Q;D-P`
Discussion
41.

Column I (A) DeltaH_"mix"=0 (B) DeltaT_"f"//"molarity" (C) (n-1)alpha+1 (D) pi_1=pi_2 € DeltaP//P^@ Column II (P) Isotonic solutions (Q) Mole fraction of solute (R) Ideal solution (S) Van’t Hoff factor for electrolyte (T) Molal depression constant

Answer»


ANSWER :A-R, B-T, C-S, E-Q
Discussion
42.

Column-I(A) CH_3CH_2CH_2CN (B) CH_3CH_2OCOCH_3 (C ) CH_3-CH=CH-CH_2OH (D) CH_3CH_2CH_2CH_2NH_2 (s) Column-II (P) Reduction with Pd-C//H_2 (Q) Reduction with SnCl_2//HCl Development of foul smell o n treatment with chloroform and alcoholic KOH (S) Reduction with diisobutylauminium hydride (DiBAL- H) (T) Alkaline hydrolysis

Answer»


ANSWER :`A to Q,S,T; B to S,T,C to P,D to R`
Discussion
43.

Column - I (A) CH_3-overset(O)overset(||)-O-overset(Ph)overset(|)underset(Ph)underset(|)-Phoverset(H^(oplus)//H_2O)to (B) CH_3-overset(CH_3)overset(|)underset(CH_3)underset(|)-overset(O)overset(||)C-o-Ph overset(H^(oplus)//H_2O)to (C ) CH_3-O- overset(CH_3)overset(|)underset(CH_3)underset(|)C-CH_3 overset(H^(oplus)//H_2O)to (D) CH_3-O-underset(CH_3)underset(|)CH-CH_3 overset(HI)to Column-II (P) Unimolecular (Q) Bimolecular (R) Alkyl oxygen bond cleavage (S) Acyl oxygen bond cleavage

Answer»

<P>

ANSWER :(A)-P,R;(B)-P,S;(C )-P,R;(D) Q,R
Discussion
44.

Column-I (A) A_(2(g))+B_(2(g))overset("Exothermic")hArr(2AB_((g))) (B) 2AB_(2(g))+B_(2(g))overset("Exothermic")hArr( 2AB_(3(g))) (C) 2AB_(3(g))overset("Exothermic")hArr(A_(2(g))+3B_(2(g))) Column-II factors affecting forward (p) High temperature (q) Low temperature (r) High pressure (s) Low pressure (t) Independent of pressure

Answer»

<P>

Answer :A `to` p,t ; B `to` q, R; C `to` q,s
Discussion
45.

Column A describes nature of bonding and column B the solid having that type of bonding: Correct matching between A and B is:

Answer»

`{:("I","II","III","IV"),("P","Q","R","S"):}`
`{:("I","II","III","IV"),("Q","S","P","R"):}`
`{:("I","II","III","IV"),("Q","P","R","S"):}`
`{:("I","II","III","IV"),("S","P","Q","R"):}`

Answer :B
Discussion
46.

Column–I and Column–II contain data on Schrondinger Wave–Mechanical model, where symbols have their usual meanings. Match the columns. Column-I (C ) psi (theta, phi) =K (independent of theta & phi) (D) atleast one angular node is present Column-II {:((P) 4s, (Q)5p_(x)),((R) 3s, (S)6d_(xy)):}

Answer»


ANSWER :`A-P;B-PQS;C-PR;D-QS`
Discussion
47.

{:("Column 1","Column 2"),((A) "Temperature of a system always decreases",(p)CH_(2)=CH-CH=CH_(2)),((B)((dE)/(dV))_(T)=0,(q)"internal energy increases"),(( C)"Temperature of the system increases",( r)"Ideal gas"),((D)DeltaH_("Hydrogenation experimental") lt DeltaH_("hydrogenation calculated",(s)"Adiabatic expansion"),(,(t)"Benzene")):}

Answer»

Solution :`A to s`, WHENEVER internal energy of a system DECREASES then the temperature always decreases.
In an adiabatic EXPANSION work is doen by the gas
`rArr W` is `-ve`
`rArr DeltaE =-ve`
`rArr` temperature decreases
`B to r`, For an ideal gas `((dE)/(dV))_(y)=0`
`C to q`
`D to (p,t)`
Discussion
48.

Column -1( Reaction Equilibrium )Column -II ( Degree of dissociation of X in terms of their equilibrium constants assuming degree of dissociation of Y is same that of Xwhenever applicable ) ( P ) X ( g) rarr Z (g) + Y ( s)( 1)( 2 sqrt( K))/( 1+ 2 sqrt(K))( Q )2X(g) rarr Y (g) + Z ( g)( 2) ( 2 sqrt( K))/( 1+sqrt(K)) ( R )X ( g) +Y(g) rarr Z(g) + W(g)( 3)( K )/( K+1) ( S ) X ( g) rarr ( Y )/( 2)(s) + ( Z)/( 2) (g)( 4) ( 2K)/( 1+ 2K) Codes :

Answer»

<P>`{:(P,Q,R,S),(3,2,2,4):}`
`{:(P,Q,R,S),(3,1,2,4):}`
`{:(P,Q,R,S),(1,3,4,2):}`
`{:(P,Q,R,S),(1,4,2,3):}`

ANSWER :A
Discussion
49.

Column 1,2 and 3 contain starting materials, reaction conditions, and type of reactions, respectively The only CORRECT combination that gives two different carboxylic acid is

Answer»

(IV)(II)(Q)
(II)(iv)(R)
(I)(i)(S)
(III)(iii)(P)

Answer :D
Discussion
50.

Column 1,2 and 3 contain starting materials, reaction conditions, and type of reactions, respectively For the synthesis of benzoic acid, the only CORRECT combination is

Answer»

(II)(i)(S)
(I)(IV)(Q)
(IV)(ii)(P)
(III)(iv)(R)

Answer :A
Discussion