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.

From where does ozone come in the photochemical smog?

Answer»

SOLUTION :In PRESENCE of sunlight, `NO_2` present in the air UNDERGOES photolysis to FORM NO and atomic oxygen. The atomic oxygen then combines with the molecular oxygen to form OZONE
`NO_2 overset"hv"to NO+(O), O+O_2 to O_3`
Discussion
2.

From the thermochemical equation, C_(6)H_(6)(l) + 7(1)/(2) O_(2)(g) rarr3H_(2)O(l) + 6CO_(2)(g) , Delta_(c ) H = -3264.64kJ mol^(-1) calculate the energy evolved when39 g of C_(6)H_(6) are burnt in an open container.

Answer»

Solution :From the given EQUATION.
When 1 mole of `C_(6)H_(6)(78G ` of `C_(6)H_(6))` is burnt, heat EVOLVED `= 3264.64kJ `
`:. `When 39 G of `C_(6)H_(6)`is burnt, heat evolved`= ( 3264.64)/(78) xx 39 = 1632.32kJ`
Discussion
3.

From the redox reaction what is the value of x and y. As_(2)s_(5)+xHNO_(3)to5H_(2)SO_(4)+yNO_(2)+2H_(3)AsO_(4)+12H_(2)O

Answer»

40, 40
10, 10
20, 20
30, 30

Answer :A
Discussion
4.

From the NH_(3) and N_(2) which gas having high attraction force and volume ? (Van der Waals constant)(i) NH_(3) having more attraction than H Bond.(ii) Volume of N_(2) gas gt Volume of NH_(3) gas.

Answer»

Solution :(i) `NH_(3)` (II) `N_(2)`
`because` (i) `NH_(3)` having more ATTRACTION than H bond.
(ii) VOLUME of `N_(2)` gas `gt` Volume at `NH_(3)` gas.
Discussion
5.

From the observations given below, suggest the relation between X, Y and Z

Answer»

Solution :In the EXPERIMENT `I, DeltaE =q-W=-100J = X `
In the experiment `II, DeltaE=4 + W = + 400J = Y `
In the experiment `III, DeltaE =-9-W = -500J = Z `
The relation between them is: Z
Discussion
6.

From the graph the order of pressure of a gas is

Answer»

<P>`P_1 GT P_2gt P_3`
`P_1lt P_2 LT P_3`
`P_1 =P_2=P_3`
`P lt P_2 gt P_3`

ANSWER :A
Discussion
7.

From the graph the correct order of temperatures is

Answer»

`T_3 GT T_2 gt T_1`
`T_3 LT T_2 lt T_1`
`T_3 = T_2 = T_1`
`T_3 gt T_2 lt T_1`

ANSWER :A
Discussion
8.

From the graph the correct order of temperatures is

Answer»

`T_3 gtT_2gt T_1`
`T_3lt T_2 LT T_1`
`T_3 = T_2= T_1`
`T_3 GT T_2 lt T_1`

ANSWER :A
Discussion
9.

From the graph the order of pressure of a gas is

Answer»

`P_1 GT P_2 gt P_3`
`P_1 LT P_2 lt P_3`
`P_1 = P_2 = P_3`
`P_1 lt P_2 gt P_3`

ANSWER :A
Discussion
10.

Fromthe graph the correct order of temperature is

Answer»

`T_1 LT T_2 lt T_3`
`T_1 = T_2 = T_3`
`T_1 GT T_2 gt T_3`
`T_1lt T_2 gt T_3`

ANSWER :A
Discussion
11.

From the graph the correct order of temperature is

Answer»

`T_1 lt T_2 lt T_3`
`T_1 = T_2 = T_3`
`T_1 GT T_2 gt T_3`
`T_1 lt T_2 gt T_3`

SOLUTION :At CONSTANT `V , P_3 > P_2 > P_1`.
`implies T_3 > T_2 > T_1`.
Discussion
12.

From the given values which one is strong oxidising agent ? [Fe(CN)_(6)]^(-4)to[Fe(CN)_(6)]^(-3)+e^(-)E^(@)=-0.35"volt" Fe^(+2)toFe^(+3)+e^(-)E^(@)=-0.77"volt"

Answer»


ANSWER :`FE^(+3)`
Discussion
13.

From the given sets of quantum numbers the one that is inconsistent with the theory is

Answer»

`n=3, l=2,m=-3,s=+1//2`
`n=4,l=3,m=3,s=+1//2`
`n=4,l=3,m=2,s=+1//2`
`n=4,l=3,m=2,s=+1//2`

ANSWER :A
Discussion
14.

From the given sets, mathc appropriately

Answer»


ANSWER :A::B::C::D
Discussion
15.

From the given potential identify metal which can completely dissociate from all solutions. E^(@)Zn^(+2)//Zn=-0.76"volt",E^(@)Cu^(+2)//Cu=+0.34"volt" E^(@)Ag^(+)//Ag=+0.80"volt",E^(@)Co^(+2)//Co=-0.28"volt"

Answer»


ANSWER :ZN
Discussion
16.

From the given graph,predict the compound which would be most easily purified by recrystallisation from aqueous solution:

Answer»

ZNS
`CaCO_(3)`
`CaF_(2)`
NaCl

Answer :D
Discussion
17.

From the followingf sets of quantum numbers,state which are possible.Explain why the other are not possible.(i)n=0,l=0,m_l=0,m_s=+(1)//(2)(ii)n=1,l=0,m_l=0,m_s=-(1)//(2)(iii)n=1,l=1,m_l=0,m_s=+(1)//(2))(iv)n=1,l=0,m_l=+1,m_s=+(1)//(2)(n=3,l=3m_l=-3,m_s=+(1)//(2)(vi)n=3,l=1,m_l=0,m_s=+(1)//(2)

Answer»

SOLUTION :(i)The set of quantum numbers is not possible because the minimum VALUE of n can beand not zero.
(II)The set quantum numbers is possible.
(iii)The et of quantum numbers is not possible because,For n=1,1 cannot be equal to 1. It can have O value.
(iv)The set of quantum numbers is not possible because for `l=0,m_l` cannot be +1. it MUST be zero .
(v) The set of quantum numbers is not possible,because,forn`=3,lcancel(=)3.`
(vi)The set of quantum numbers is possible.
Discussion
18.

From the following which reaction is not redox reaction ?

Answer»

`2H_(2)+O_(2)to2H_(2)O`
`Cu^(++)ZntoZn^(++)+Cu`
`HCl+H_(2)OtoH_(3)O^(+)+Cl^(-)`
`Cl_(2)+2H_(2)O+SO_(2)to4H^(+)+SO_(4)^(-2)+2CL^(-)`

Solution :In this reaction there is only REDUCTION of `H_(2)O_(2)` hence it is not a redox reaction.
Discussion
19.

From the following which reaction is redox reaction ?

Answer»

`NaOH_((aq))+HCl_((aq))toNaCl_((aq))+H_(2)O_((l))`
`CH_(3)COOH+CH_(3)OHtoCH_(3)COOCH_(3)+H_(2)O`
`K_(2)SO_(4(aq))+BaCl_(2(aq))to2KCl_((aq))+BaSO_(4(l))`
`H_(2)S_((aq))+3H_(2)SO_(4(aq))to4SO_(2(g))+4H_(2)O_((l))`

Answer :D
Discussion
20.

From thefollowingwhichsetsofionsisisoelectronic ?

Answer»

`K^(+) ,CI^(-) ,Ca^(2) ,Sc^(3)`
`BA^(+2),Sr^(2),K^(+)s^(-2)`
`N^(-3)O^(-2)F^(-) S^(-2)`
`Li^(+),NA^(+),Mg^(-2),Ca^(+2)`

Answer :A
Discussion
21.

From the following which pair is unfair ?

Answer»

`H_(2)O_(2),Na_(2)O_(2)`
`BaO_(2),K_(2)O_(2)`
`H_(2)O_(2),O_(2)F_(2)`
`H_(2)O,H_(2)SO_(4)`

Solution :OXIDATION number of OXYGEN in `H_(2)O_(2)` is -1 while oxidation number of xoygen in `O_(2)F_(2)` is (+1).
Discussion
22.

From the following which option state mixture and compound respectively ?

Answer»

Sugar SOLUTION, Salt solution
`O_(2), H_(2)O`
LEMON juice, `NH_(3)`
`H_(2), H_(2)O_(2)`

ANSWER :C
Discussion
23.

From the following which one is constant ?

Answer»

VALENCY
EQUIVALENT weight
molecular mass
NONE of these

Answer :A::C
Discussion
24.

From thefollowingwhichone isheavierparticle ?

Answer»

positron
PHOTON
NEUTRON
PROTON

Answer :C
Discussion
25.

From the following which one has least number of molecules ?

Answer»

`22.4 L CO_(2)` at STP
0.1 mole `CO_(2)` gas
22 G `CO_(2)` gas
11200 ML `CO_(2)` at STP

Answer :A::B::C
Discussion
26.

From the following which compound shows different oxidation number of H ? LiAlH_(4),NaBH_(4),NaHCO_(3),MgH_(2)

Answer»

`MgH_(2)`
`NaHCO_(3)`
`LiAlH_(4)`
`NaBH_(4)`

SOLUTION :`MgH_(2),LiAlH_(4)andNaBH_(4)` are metal HALIDE, so oxidation number of H is -1 and `NaHCO_(3)` is normal compound, so oxidation number of H is (+1).
Discussion
27.

From the following which one has least molecules ?

Answer»

0.1 mole `CO_(2)`
`11.2 L CO_(2) ` at STP
`22 g CO_(2)`
`22.4xx10^(3)` mL `CO_(2)` (STP)

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

From thefollowingwhichequationis nottheformof de - broglisequation ?

Answer»

KINETICENERGY `(2hv )/( LAMBDA )`
`lambda m = (h )/( v)`
`lambdap= h `
Kineticenergy `= (HV )/ (2lambda)`

Answer :A
Discussion
29.

From the following which element from 5^(th)period and 17^(th)group ?

Answer»

TE
I
At
SE

ANSWER :B
Discussion
30.

From the following which compound have -1 oxidation number of nitrogen ?

Answer»

`NH_(2)-NH_(2)`
`NH_(3)`
`NH_(2)OH`
`NH_(4)OH`

SOLUTION :`NH_(2)OHrArrN+3(H)+O=0`
`rArrN+3-2=0`
`rArrN=-1`
Discussion
31.

From the following which compound has less oxidation state of Fe ?

Answer»

`K_(3)[FE(CN)_(6)]`
`K_(2)[FeO_(4)]`
`[Fe(OH)_(6)]^(-3)`
`FeSO_(4)*(NH_(4))_(2)*SO_(4)*7H_(2)O`

Answer :D
Discussion
32.

From the following w hich pair is isotone and isobar respectively.

Answer»

III and I
I and II
I and iii
iii and IV

SOLUTION :
Discussion
33.

From the following values of dissociation constant of four acids which value represents the strongest acid ?

Answer»

`2 XX 10^(-2)`
`0.02 xx 10^(-1)`
`3 xx 10^(-4)`
`2 xx 10^(-4)`

SOLUTION :Greater is the dissociation constant, greater is the acidic strength
Discussion
34.

From the following table {:("Buffer solution ", "Vol .of 0.1 M weak acid ", "Vol. of . 0.1 M sodium salt of weak acid "),(I,4.0, 4.0 ),(II, 4.0,40.0 ),( III, 40.0 , 4.0),(IV, 0.1,10):} Which of the two sets of buffer solutions have least pH ?

Answer»

`I & II`
` I & III`
` II &III`
` II & IV `

Solution :Buffer -1 ` PH =P^(ka)j+log ""(4)/(4)rArr pH =P^(Ka) `
Buffer -2
` pH = P^(Ka)+log ""( 40)/(4)rArr pH=P^(Ka)+1`
Buffer -3
` pH =P^(Ka) +log ""(4)/(40 ) rArrpH =P^(Ka) -1 `
Buffer -4` pH =P^(Ka) +log ""(10)/(0.1)rArrpH= P^(Ka+2)`
Discussion
35.

From the following thermochemical equations, calculate the standard enthalpy of formationof HCl(g) . (A) H_(2)(g) rarr 2H(g) , DeltaH^(0)= + 436.0 kJ mol^(-1)(B)Cl_(2)(g)rarr 2Cl(g), DeltaH^(0)= + 242.7 kJ mol^(-1) (C ) HCl(g) rarr H(g) + Cl(g) , DeltaH^(0) = + 431.8 kJ mol^(-1)

Answer»


SOLUTION :AIM`: (1)/(2) H_(2)(g) + (1)/(2) Cl_(2)(g) rarrHCl(g)`
Discussion
36.

From the following statements reagarding H_(2)O_(2). Choose the incorrect statements

Answer»

It has to be stored inplastic or wax linked glass bottles in dark.
It ha to be KEPT away from dust
It can act only as an oxidizing AGENT.
It decomposes on exposure to light.

Solution :(C ) The STATEMENT is wrong. `H_(2)O_(2)` can act both as an REDUCING agent.
Discussion
37.

From the following statement regarding H_(2)O_(2), choose the incorrect statement.

Answer»

It has to the stored in PLASTIC or WAX lined glass bottles in dark
It has to be KEPT away from dust
It can act only as an oxidising AGENT
It DECOMPOSES on exposure to light .

Solution :`H_(2)O_(2)` can act both as an oxidising as well as a redcuing agent .
Discussion
38.

From the following sequence of reactions , [A] (C_(6)H_(12)) overset(HCl)(rarr) (B) (C_(6) H_(13)Cl)+ (C) (C_(6)H_(13)Cl) react with AgNO_(3) to give white ppt. [B]overset("Alc." KOH)(to) (D)(An isomer of A ) gives positive test with Br_(2)//C Cl_(4) [D] overset("Ozonelysis")(to)(E) gives positive iodoform test and negative Fehling's test . [A] overset("Ozonolysis")(to) (F) + (G) , both F and G give positive Tollen's test . [F] + [G] underset(Delta)overset("Conc." NaOH)(to) HCOONa + alcohol The reaction involve in F and G with the NaOH is : The structure of compound D is :

Answer»




ANSWER :D
Discussion
39.

From the following sequence of reactions , [A] (C_(6)H_(12)) overset(HCl)(rarr) (B) (C_(6) H_(13)Cl)+ (C) (C_(6)H_(13)Cl) react with AgNO_(3) to give white ppt. [B]overset("Alc." KOH)(to) (D)(An isomer of A ) gives positive test with Br_(2)//C Cl_(4) [D] overset("Ozonelysis")(to)(E) gives positive iodoform test and negative Fehling's test . [A] overset("Ozonolysis")(to) (F) + (G) , both F and G give positive Tollen's test . [F] + [G] underset(Delta)overset("Conc." NaOH)(to) HCOONa + alcohol The reaction involve in F and G with the NaOH is : The reaction involve in the F and G with NaOH is :

Answer»

REIMER- Tiemann reaction
ALDOL condensation
Cannizzaro reaction
Perkin reaction

ANSWER :C
Discussion
40.

From the following sequence of reactions , [A] (C_(6)H_(12)) overset(HCl)(rarr) (B) (C_(6) H_(13)Cl)+ (C) (C_(6)H_(13)Cl) react with AgNO_(3) to give white ppt. [B]overset("Alc." KOH)(to) (D)(An isomer of A ) gives positive test with Br_(2)//C Cl_(4) [D] overset("Ozonelysis")(to)(E) gives positive iodoform test and negative Fehling's test . [A] overset("Ozonolysis")(to) (F) + (G) , both F and G give positive Tollen's test . [F] + [G] underset(Delta)overset("Conc." NaOH)(to) HCOONa + alcohol The structure of C is :

Answer»




ANSWER :C
Discussion
41.

From the following sequence of reactions , [A] (C_(6)H_(12)) overset(HCl)(rarr) (B) (C_(6) H_(13)Cl)+ (C) (C_(6)H_(13)Cl) react with AgNO_(3) to give white ppt. [B]overset("Alc." KOH)(to) (D)(An isomer of A ) gives positive test with Br_(2)//C Cl_(4) [D] overset("Ozonelysis")(to)(E) gives positive iodoform test and negative Fehling's test . [A] overset("Ozonolysis")(to) (F) + (G) , both F and G give positive Tollen's test . [F] + [G] underset(Delta)overset("Conc." NaOH)(to) HCOONa + alcohol The structure A and B respectively are :

Answer»




ANSWER :A
Discussion
42.

From the following select the correct order of negative (-I) effect

Answer»

`-NO_(2) gt -CN gt -COOH gt -F gt - OCH_(3)`
`-NO_(2) gt -COOH gt - CN gt - F gt -OCH_(3)`
`-NO_(2) gt -CN gt -COOH gt -OCH_(3) gt -F`
`-COOH gt -CN gt -F gt -OCH_(3) gt -NO_(2)`

Solution :`-NO_(2) gt -CN gt -COOH gt -F gt -Cl gt - Br gt -I gt -OH - OCH_(3) gt- C_(6)H_(5) gt -H`
Discussion
43.

From the following redox reaction, 2S_(2)O_(3)^(-2)+I_(2)toS_(4)O_(6)^(-2)+2I^(-)

Answer»

`S_(4)O_(6)^(-2)` is oxidation in `S_(2)O_(3)^(-2)`.
`S_(4)O_(6)^(-2)` is redaction in `S_(2)O_(3)^(-2)`.
`I_(2)` is REDUCED to `I^(-)`.
`I_(2)` is oxidised in `I^(-)`.

Solution :`I_(2)` is reduced into `I^(-)`. Here `S_(2)O_(3)^(-2)` is oxidise in `S_(4)O_(6)^(-2)` while `I_(2)` is reduce in `I^(-)`.
Discussion
44.

From the following reaction which element.s oxidation number is not change ? 3MnO_(2)+4Feto3Mn+2Fe_(2)O_(3)

Answer»

Mn
FE
O
Mn and Fe both

Answer :C
Discussion
45.

From the following reaction which substance act as reducing agent ? HCHO+AgOtoHCOOH+2Ag

Answer»

HCHO
Ag
HCOOH
`Ag_(2)O`

Solution :`underset(+0)underset(darr)(HCHO)+underset(+1)underset(darr)(AgO)tounderset(+2)underset(darr)(HCOOH)+underset(0)underset(darr)(2Ag)`
Here, `Ag_(2)O` reduce into Ag while in HCHO it will be oxidised. So HCHO is REDUCING agent.
Discussion
46.

From the following reaction which element.s oxidation number is decreases ? MnO_(4)^(-)+5Fe^(+2)+8H^(+)toMn^(+2)+5Fe^(+3)+4H_(2)O

Answer»

Mn
Fe
O
`H_(2)`

SOLUTION :`UNDERSET(+7)underset(darr)(MnO_(4)^(-))tounderset(+2)underset(darr)(Mn^(+2))`
Discussion
47.

From the following observations predict the type of orbital : Observation 1: x y plane acts as a nodal plane Observation 2: The angular function of the orbital intersect the three axis at origin only. Observation 3: R^2(r) vs r curve is obtained for the orbital is

Answer»

`5P_z`
`6d_(XY)`
`6 dx^2 - y^2`
`6d_(yz)`

Solution :`5p_z` has 3 RADIAL nodes in which xy plane is nodal plane
Discussion
48.

Fromthe followingorbitalsof whichelectronconfigurationviolatesAufbauprinciple ?

Answer»


ANSWER :C
Discussion
49.

From thefollowingin whichpairoforbitlashave moreattraction withnucleus (i) 4fand 5d (ii)4d and5 s(iii)7s and5 f ,(ii) 7p and5p( v)3dand3f

Answer»

Solution :(i) 4fhas mareattractionwithnuclear.
4F and5d : `(n+1)-=7` butin 4fin isless
(ii) in5shas moreattraction
(iii) in 7shas moreattraction
7S : (n+1)= 7,5f: (n+1) =8
(IV)in 5phas moreattractionn isless
itssubshell issamebut VALUEOF n inspis LESS
(v )Notpossible3fdoes not exist.
Discussion
50.

From the following given statements (i) O………………..H hydrogen bond length is more than covalent O-H bond length. (ii) The ionic bond strength of CsF is more than that of NaF. (iii) The number of electrons present in all inner shells of sodium atom are 10. The correct combination is

Answer»

only i is CORRECT
only i and II are correct
only ii and III are correct
only i and iii are correct

Answer :D
Discussion