Explore topic-wise InterviewSolutions in Current Affairs.

This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.

1.

Maximum covalency of nitrogen is.............

Answer»

3
5
4
6

Solution : Due to absence of rf-orbitals, nitrogen cannot expand its COVALENCE BEYOND 4
Discussion
2.

Maximum bond energy of C-H bonds is found in the compound

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Ethane
Ethene
Ethyne
Equal in all the three

Solution :BOND ENERGY is MAXIMUM for triple bond.
Discussion
3.

Maximum bond angle at nitrogen is present in which of the following ?

Answer»

`NO_(2)`
`NO_(2)^(-)`
`NO_(2)^(+)`
`NO_(3)^(+)`

SOLUTION :`NO_(2)^(+)`sp hybridisation (BOND ANGLE = 180°)
`(NO_(2)^(-) lt NO_(3)^(-) lt NO_(2) lt NO_(2)^(+))/("bond angle"uarr)`
Discussion
4.

Maximum amount of a solid solute that can be dissolved in a specified amount of a given liquid solvent does not depend upon …..

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TEMPERATURE
Nature of solute
PRESSURE
Nature of solvent

Solution :EXPLANATION : Solubility of a SOLID in liquid does not depend upon pressure since solid and liquids are almost incompresible.
Discussion
5.

Maximum amount of a substance that can be dissolved in a specified amount of a solvent ata specified temperature is called.

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SOLUTION :SOLUBILITY
Discussion
6.

Maximum amount of a solid solute that can be dissolved in a specified amount of a given liquid solvent does not depend upon ………….. .

Answer»

TEMPERAURE
NATURE of solute
Pressure
Nature of solvent

Answer :C
Discussion
7.

Max. number of moles of electrons taken up byone mole of NO_(3)^(-) when it is reduced to

Answer»

`NH_(3)`
`NH_(2)OH`
`NO`
`NO_(2)`

ANSWER :A
Discussion
8.

Max no.of unpaired e^- in ground state of Gadolinium (Gd, Z =64)

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SOLUTION :`Gd = [xe] 4F^(7) 5D^(1) 6s^(2)`
Discussion
9.

Maximum amount of a solid aolute that can be dissolved in a specified amount of a given liquid solvent does not depend upon………..

Answer»

Temperature
Nature of solute
PRESSURE
Nature of SOLVENT

Solution :Pressure does not influence the solutbility of SA SOLID in a liquid.
Discussion
10.

Matter around us can exist in three different states , namely , solids , liquid and gas . The correct order of their compressibility is

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Liquid `lt` Gas `lt` SOLID
Solid `lt` Liquid `lt` Gas
Gas `lt` Liquid `lt` Solid
Solid `lt` Gas `lt` Liquid

Solution :Temporary HARDNESS is DUE to the presence of calcium hydrogencarbonate `Ca(HCO3)`2(aq) and magnesium hydrogencarbonate Mg(HCO3)2(aq) . Both calcium hydrogencarbonate and magnesium hydrogencarbonate decompose when heated.
Discussion
11.

Matte is obtained after this step-

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Froth FLOATATION
ROASTING
Smelting
Refining

Solution :Refer PROCESS of COPPER
Discussion
12.

Matte is a mixture of....

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`Cu_2S_2 + FES`
`Cu_2S + Fe_2S`
`CUS + FeS`
`Cu_2S + FeS`

ANSWER :D
Discussion
13.

''Matte'' is a mixture of ........

Answer»

`Cu_2S + ZNS`
`PbS + ZnS`
`Cu_2S + FeS`
`FeO + SiO_2`

ANSWER :C
Discussion
14.

Matte contains mainly

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`Cu_(2)SandFeS`
`CuSandFe_(2)S_(3)`
FE
`Cu_(2)S`

ANSWER :A
Discussion
15.

Matrix-Matching problems: [A] Match the List-I with List-II:

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ANSWER :A::B::C::D
Discussion
16.

Matrix :

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SOLUTION :
Discussion
17.

Mathematical expression for t_(1//4) i.e., when (1//4)^(th) reaction is over following first order kinetics can be given by:

Answer»

`t_(1//4)=2.303/Klog4`
`t_(1//4)=2.303/Klog2`
`t_(1//4)=2.303/K"LOG"4/3`
`t_(1//4)=2.303/K"log"3/4`

ANSWER :C
Discussion
18.

Math the carbohydrate in Column I with its characteristic given in Column II

Answer»

<P>A-p, B-Q, C-s, D-R
A-q, B-p, C-s, D-r
A-q, B-p, C-r, D-s
A-s, B-r, C-q, D-p

Solution :(a)-(p, q) , (b)-(p),(.c.)-(s), (d)-(r)
Discussion
19.

Math the carbohydrate in Column I with its characteristic given in Column II

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<P>A-s, B-R, C-p , D-Q
A-p, B-q, C-r, D-s
A-r, B-s, C-p, D-q
A-s, B-r, C-q, D-p

Solution :(a)-(q, s) , (b)-(.r.),(.c.)-(q), (d)-(p)
Discussion
20.

Mathc the solutions given in Column I and the coloures given in Column II. {:(,"Column I (Aqueous solution of salt)",,"Column II (Colour)"),((i),FeSO_(4).7H_(2)O,(a),"Green"),((ii),NiCl_(2).4H_(2)O,(b),"Light pank"),((iii),MnCl_(2).4H_(2)O,(c ) ,"Blue"),((iv),CoCl_(2).6H_(2)O,(d) ,"Pale green"),((v),Cu_(2)Cl_(2),(e ),"Pink"),(,,(f ),"Colourless"):}

Answer»


Answer :`(i) rarr (d) , (ii) rarr (a), (III)rarr(B), (iv) rarr (E ) , (V) rarr (f) `
Discussion
21.

Material used in solar cells contains :

Answer»

Si
Cs
Sn
Ti

Answer :A
Discussion
22.

Matct the following : {:("Column-I","Column-II"),((A)"Working concentration cell", (p)H_2+1/2 O_2toH_2O + "electrical energy"),((B)"Spontaneous cell reaction",(q)E_(cell)^@=0),((C )"Non-working Daniel cell",(r)E_(cell) gt 0),((D)"Working fuel cell",(s)"Galvanic cell"),((t)"For working of concentration cell, concentration of cation in anodic compartment should be less than the cathodic compartment"):}

Answer»


Solution :A: CONC cell : `E_("cell")^@=0, E_("cell")=-0.0591/n "LOG" (["CATION"]_("Anode"))/(["cation"]_("cathode"))`
B: spontaneous cell reaction `E_("cell")^@ gt 0`
C: DANIELL cell : Galvanic cell
D: Fuel cell
`H_2+1//2 O_2 to H_2O+`Electrical ENERGY
Discussion
23.

Matching Type questions

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SOLUTION :A-q, B-q , C-s , D-r
Discussion
24.

Matching Type Questions

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SOLUTION :
Discussion
25.

Matching Type questions

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SOLUTION :A-r , B-q, C-p, D-s ,E-t
Discussion
26.

Matching the information given in the three columns of the following table. [Note: Atomic Number of Cr=24,V=23,Pt=78)] Correct combination for [PtCl_(2)(NH_(3))_(2)] is :

Answer»

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

Answer :C
Discussion
27.

Matcht he List-I with List-II : .

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ANSWER :A::B::C::D
Discussion
28.

Matching Type Questions

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Solution :
DIPOLE MOMENT order is Ketone `GT ` ALDEHYDE` gt ALPHA , beta` unsaturated , Aldehyde `gt ` Alkenes
Discussion
29.

Matching the information given in the three columns of the following table. [Note: Atomic Number of Cr=24,V=23,Pt=78)] Correct combination for [VCl_(2)(NO_(2))_(2)(NH_(3))_(2)]^(-)

Answer»

<P>(II),(i),P
(I),(iii),S
(III),(ii),R
(IV),(iv),Q

Answer :B
Discussion
30.

Matching the information given in the three columns of the following table. [Note: Atomic Number of Cr=24,V=23,Pt=78)] About (CrCl_(3)(NH_(3))_(3)) which of following combination is correct ?

Answer»

<P>(III),(iii),P
(II),(IV),Q
(IV),(i), R
(I),(ii),S

Answer :A
Discussion
31.

Matching the information given in the three columns of the following table . For the sheet silicate the only CORRECT combinatin is :-

Answer»

<P>II,I, (P)
II,(ii),(Q)
(IV),(ii),(R)
(III),(iii),(P)

Answer :A
Discussion
32.

Matching the information given in the three columns of the following table . For single chain silicate the only CORRECT combination is :-

Answer»

<P>(I),(iii),(R)
(IV),(II),(P)
(III),(ii),(Q)
(IV),(i),(P)

Answer :A
Discussion
33.

Matching the information given in the three columns of the following table . For 3D silicate (silica) the only CORRECT combination is :-

Answer»

(II) ,(ii),(Q)
(III),(iv),(R)
(III),(iii),(R)
(III),(iv),(S)

ANSWER :A
Discussion
34.

Matching the imformation given in the three columns of the following table. {:("Column 1","Column 2","Column 3"),("(Reaction)","(Process)","Ores(Reactant)"),((I)PbS rarr PbO,(i) "Roasting","(P) Zinc blende (ZnS)"),((II)CaCO_(3) rarr CaO,(ii)"Calcination","(Q) Galna (PbS)"),((III) ZnS rarr Zn,(iii) "Carbon reduction","(R) Pyrit"),((IV) CuFeS_(2) rarr Ca,(iv) "Salt reduction",(S) "Limestone"):} Which of the following combination is correct option ?

Answer»

<P>(II) (ii) (S)
(II) (i) (R)
(III) (i) (P)
(III) (ii) (S)

ANSWER :A
Discussion
35.

Matching the imformation given in the three columns of the following table. {:("Column 1","Column 2","Column 3"),("(Reaction)","(Process)","Ores(Reactant)"),((I)PbS rarr PbO,(i) "Roasting","(P) Zinc blende (ZnS)"),((II)CaCO_(3) rarr CaO,(ii)"Calcination","(Q) Galna (PbS)"),((III) ZnS rarr Zn,(iii) "Carbon reduction","(R) Pyrit"),((IV) CuFeS_(2) rarr Ca,(iv) "Salt reduction",(S) "Limestone"):} Which of the following option is incorrect ?

Answer»

(III) (ii) (P)
(III) (i) (P)
(II) (iv) (R)
(IV) (i) (R)

ANSWER :C
Discussion
36.

Matching the imformation given in the three columns of the following table. {:("Column 1","Column 2","Column 3"),("(Reaction)","(Process)","Ores(Reactant)"),((I)PbS rarr PbO,(i) "Roasting","(P) Zinc blende (ZnS)"),((II)CaCO_(3) rarr CaO,(ii)"Calcination","(Q) Galna (PbS)"),((III) ZnS rarr Zn,(iii) "Carbon reduction","(R) Pyrit"),((IV) CuFeS_(2) rarr Ca,(iv) "Salt reduction",(S) "Limestone"):} Which of the following option is correct ?

Answer»

<P>(I) (i) (Q)
(I) (II) (S)
(I) (iii) (P)
(IV) (iv) (Q)

Answer :A
Discussion
37.

Matching the imformation given in the three columns of the following table. {:("Column 1"," ""Column 2","""Column 3"),("(Metals)","(Name of Ore)","Name of compositon of Ore"),("(I) Cu","(i) Glauberite","(P) Nitre"),("(II) K","(ii) Chlororgyrite","(Q) Glauber's salt"),("(III) Ag","(iii) Indian salt petre","(R) Fool's gold"),("(IV) Na","(iv) Chalcopyrite","(S) Horn silver"):} Which of the following combination is correct option ?

Answer»

<P>(III) (ii) (S)
(I) (iii) (P)
(II) (ii) (R)
(IV) (iv) (Q)

Answer :A
Discussion
38.

Matching list type:

Answer»

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

ANSWER :A
Discussion
39.

Matching the imformation given in the three columns of the following table. {:("Column 1"," ""Column 2","""Column 3"),("(Metals)","(Name of Ore)","Name of compositon of Ore"),("(I) Cu","(i) Glauberite","(P) Nitre"),("(II) K","(ii) Chlororgyrite","(Q) Glauber's salt"),("(III) Ag","(iii) Indian salt petre","(R) Fool's gold"),("(IV) Na","(iv) Chalcopyrite","(S) Horn silver"):} Which of the following option is incorrect ?

Answer»

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

Answer :C
Discussion
40.

Matching the imformation given in the three columns of the following table. {:("Column 1"," ""Column 2","""Column 3"),("(Metals)","(Name of Ore)","Name of compositon of Ore"),("(I) Cu","(i) Glauberite","(P) Nitre"),("(II) K","(ii) Chlororgyrite","(Q) Glauber's salt"),("(III) Ag","(iii) Indian salt petre","(R) Fool's gold"),("(IV) Na","(iv) Chalcopyrite","(S) Horn silver"):} Which of the following option is correct ?

Answer»

<P>(I) (i) (S)
(II) (III) (P)
(III) (IV) (R)
(IV) (i) (Q)

ANSWER :B
Discussion
41.

Matching {:("List - I","List - II"),("A) Adding excess KI to "AgNO_3(aq),"p) +ve mobile layer"),("B) Adding excess "AgNO_3 "to aq.KI ","q) -ve mobile layer"),("C) Adding excess NaCl to Gold Sol ","r) Flocculation"),("D) Removing excess electrolyte from a sol","s) Stabilisation of sol"):}

Answer»


Solution :Adding EXCESS of KI to `AgNO_3` - +ve MOBILE layer
Adding excess of `AgNO_3` to AQ KI -ve mobile layer
Adding excess NaCl to Gold SOL - Flocculation
Removing excess electrolyte from a sol - Stabilisation of sol
Discussion
42.

Match type Questions

Answer»


SOLUTION :
Discussion
43.

Match this list I with list II and then select the answer from the codes given below the lists-

Answer»


ANSWER :A::B::C::D
Discussion
44.

Match the values of ionization energy and electron gain enthalpy listed in column I with characteristic(s) of elements listed in column II. {:("Column-I","Column-II"),((A)"2372 5251 +48",(p)"Element which acts as a strong reducing agent"),((B)"4193051-48",(q)"Element which exists as a monoatomic molecule"),((C )"16813374-333",(r)"Least reactive non-metal"),((D)"10081846-295",(s)"Element which acts as a strong oxidising agent"),(,(t)"Element which oxides is a stronger basic in nature"):}

Answer»


Solution :(A)Inert gas exist as monoatomic molecule. They have highest `IE_1` and `IE_2` and positive electron GAIN enthalpies.
(B)Alkali metal -`IE_1` is low because of bigger size of atom and `IE_2` is high due to noble gas configuration . As it has low `IE_1` it can lose one electron easily and THUS more electropositive .So it acts as strong reducing agents and their oxides are basic in nature.They have low negative value of `DeltaH_(eg)` because of large size.
(C )`IE_1 and IE_2` both high and negative value of electron gain ENTHALPY is very high because of high nuclear charge and small size of atoms, so it has a greater tendency to accept an ADDITIONAL electron.So it (F) act as a strong oxidising agent.
(D)As it has less negative value for `DeltaH_(eg)` than (C )thus it will be least reactive non-metal (I)
Discussion
45.

Match the types of colloidal systems given in Column I with the name given in Column II.

Answer»


SOLUTION :N//A
Discussion
46.

Match the transformation in Column I with appropriate options is Column II{:(,"Column I",,"Column II"),((A),CO_(2)(s)rarrCO_(2)(g),(p),"Phase transition"),((B),CaCO_(3)(s)rarrCaO(s)+CO_(2),(q),"Allotropic change"),((C),2H• rarrH_(2)(g),(r),DeltaH" is positive"),((D),P_(("white,solid"))rarrP_(("red,solid")),(s),DeltaS" is positive"),(,,(t),DeltaS " is negative"):}

Answer»


Solution :(A) `CO_(2)(s)rarrCO_(2)(g)`
It is phase TRANSITION. The process is ENDOTHERMIC (sublimation). Gas is produced, so entropy increases.
(B) On heating `CaCO_(3)` decomposes, So, process is endothermic. The entropy increases as gaseous product is FORMED.
(C) `2H•rarrH_(2)(g)`
Entropy decreases as number of gaseous particles decreases.
(D) It is phase transition
White and RED P are allotropes
Red P is more stable than white ,brgt So `DeltaG` is -ve
Discussion
47.

Match the transformation in column I with appropriate option in column II {:(,"Column I",,"Column II"),((A),CO_(2)(s) rarr CO_(2) (g),(p),"phase transition"),((B),CaCO_(3)(s) rarr CaO(s)+CO_(2)(g),(q),"allotropic change"),((C),2H^(*) rarr H_(2)(g),(r),DeltaH" is positive"),((D),P_("(white, solid)") rarr P_("(red, solid)"),(s),DeltaS" is positive"),(,,(t),DeltaS" is negative"):}

Answer»


SOLUTION :PHASE TRANSTION also INCLUDES ALLOTROPIC transition.
Discussion
48.

Match the type of arrangment in column I with the characteristic feature mentioned in column II.

Answer»


ANSWER :`(A) - (p)(s) "" (B) - (p)(r)(s) "" (C)- (s) ""(D) -(Q)`
Discussion
49.

Match the times of Column In and Column II.

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SOLUTION :N//A
Discussion
50.

Match the transformation in column I with appropriate options in column II

Answer»


ANSWER :A: p, r and sB : r and sC : TD: p, q and t
Discussion