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.

Find out X and Y in the following reaction Xoverset(I_(2)//HgO)to" iodobenzene "overset(2Na)toY

Answer»

TOLUENE and ALKYL BENZENE
toluene and diphenyl
benzene and alkyl benzene
benzene and diphenyl

Answer :D
Discussion
2.

Find out work done for the given cell Cr|Cr^(+3) || Fe^(+2)| Fe E_(Cr//Cr^(3+))^(@) = 0.74 V, E_(Fe^(2+)//Fe)^(@) = -0.44 V

Answer»

Solution :`E_("cell")^(@) = E_("cathode")^(@) - E_("ANODE")^(@)`
`=-0.44 V + 0.74 V = 0.30` V
[since cell reaction `2Cr + 3Fe^(2+) to 2Cr^(3+) + 3Fe`, n = 6 mol ELECTRON]
`W= -nFE^(@) =-6 xx 96500 xx 0.30 W = 173.7` KJ
Discussion
3.

Find out which of the following is the strongest oxidizing agent.

Answer»

`CL^(-)`
`Mn^(2+)`
`MnO_(4)^(-)`
`Cr^(3+)`

Solution :Strongest oxidizing agent is one which is reduced most easily, i.e., which has highest reduction POTENTIAL VIZ. `MnO_(4)^(-)` (reduced to `Mn^(2+)`).
Discussion
4.

Find out total number of representative elements in the given element: Cd, Nb, Ta, Te, Ra, Mo, Po, Pd, Tc

Answer»


SOLUTION :`TE,PO,RA`
Discussion
5.

Find out the wrong statement about corey House reaction.

Answer»

The rate of reaction for alkane SYNTHESIS by corey House reaction SI `1^(@) R-X gt 2^(@) R-X gt 3^(@) R-X`
Thisis good process to obtain alkane with odd number of carbons atoms
It introduce alkyl PART in FORM of `R^(o+)`
It gives alkene as major PRODUCT with `3^(@) R-X`

Solution :It introduce alkyl part in form of `R^(Theta)`
Discussion
6.

Find out the volume of Cl_(2) at STP produced by the action of 100cm^(3) of 0.2 N HCl on excess of MnO_(2).

Answer»


Solution :`MnO_(2)+underset(4xx36.5g)(4HCl)rarrMnCl_(2)+2H_(2)O+underset(22400cm^(3)" at STP")(Cl_(2))`
`"HCl PRESENT in "100cm^(3)" of 0.2 N HCl"=(0.2)/(1000)xx"100g eq.= 0.02g eq."xx"36.5 g = 0.73 g"`
Discussion
7.

Find out the volume in mL of 0.1 N HCl solution required to react completely wth 1.0 g of a mixture of Na_(2)CO_(3) and NaHCO_(3)containing equimolar amounts of the two compounds .

Answer»

Solution :Let the amount of `Na_(2)CO_(3)` in 1 G of mixture be X g and sincethe `Na_(2)CO_(3) and NaHCO_(3)`are in equimolar amounts ,
`x/106 = (1-x)/84 , " where " {{:("mol . WT . Of "Na_(2)CO_(3)=106),(" mol .wt of "NaHCO_(3)=84):}}`
` :. "" x = 0.558 g `
Thus wt. of `na_(2)CO_(3) = 0.558 g `
and wt. of `NaHCO_(3) = 1 - 0.558 = 0.442 g `
Now ,
m.e of HCL = m.e of `Na_(2)CO_(3) + " m.e of " NaHCO_(3)`
m.e of HCl = eq. of `Na_(2)CO_(3) xx 1000 + " eq. of " NaHCO_(3) xx 1000 ""...(Eqn.3)`
If v is the volume of HCl in mL
then `0.1 xx v = (0.558)/53 xx 1000 + (0.442)/84 xx 1000 "" ...(Eqn. 4i)`
` :. "" v = 157 .9 mL `
Discussion
8.

Find out the value of electrostatic potential eneryg of two electrons separated by 3.0Å in vacuum. Express your answer in joules and electron volt.

Answer»


ANSWER :4.8 EV
Discussion
9.

Find out the total number of stereoisomers of the given following compound. Cl-CH=CH-overset(Cl)overset(|)underset(H)underset(|)C-CH=CH-Cl

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SOLUTION :
Discussion
10.

Find out the total number of species having atleast one adjacent bond angles is le 90^(@) BrF_(5),XeO_(3),SiCl_(4),SOF_(4),SO_(3),PCl_(5),IO_(2)F_(2)^(Theta)

Answer»
Discussion
11.

Find out the total number of stereocentre in the given compound. CH_(3)-CH=CH-underset(Br)underset(|)CH-underset(Cl)underset(|)CH-CH_(3)

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SOLUTION : STEREOCENTRES `=2+2=4`
Discussion
12.

Find outthetotalnumberof isomers includingstereoisomers obtinedbydichlorination of propane .

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ANSWER :5
Discussion
13.

Find out the total number of cyclic isomers of C_(4)H_(10) which areopticallyactive ?

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ANSWER :2
Discussion
14.

Find out the total number of compound which have p_(pi)-d_(pi) types of back bonding BF_(3),B_(3)N_(3)H_(6),O(SiH_(3))_(2),(SiH_(3))NCS,Ocl_(2),SCl_(2),PH_(3),PF_(3)

Answer»
Discussion
15.

find out the standard free energy change at60^(@)Cand at 1 atn if the N_(2)O_(4) is 50 % dissociated

Answer»

`-800 .0 kJ mol^(-1)`
`+ 800.0 kJ mol^(-1)`
`789.89 JK^(-1) mol^(-1)`
`+ 789.98 JK^(-1)mol ^(-1)`

Solution :`N_(2)O_(4)(g)Leftrightarrow2NO_(2)(g)`
` N_(2)O_(4)` is 50 %dissociated , the mole fraction of thesubstance is given by `x_(n2O4)= (1-05)/(1 + 0.5), x_(no2)= (2xx0.5)/(1+0.5)`
`P_(n2O4)=0.5/1.5xx 1 atm , p_(no2)1/1.5 XX 1atm`
the equilibrium CONSTANT ` K_(p)` is given by`k_(p) =(P_(no_(2)))^(2)/(P_(N_(2)O_(4)))=1.5/((1.5)^(2)(0.5))=1/0.75=1.33`
` Delta_(a)G^(Theta)=-RT in K_(p)`
`=- 8.314 Jk^(-1)mol^(-1)xx333 K xx 2.303xx 0.1239`
`=-789.89 JK^(-1) mol^(-1)`
Discussion
16.

Find out the product of the following reactions. (i) CH_(3)CH(Cl)COOH underset((ii)H_(2)"O"//Delta)((i) NaNO_(2))(to)? [X] (i) CH_(3)CH_(2)-Br+NaNO_(2)overset("alcohol" //Delta)(to)[Y]

Answer»

Solution :(i) `underset((alpha-"Chloropropionic ACID"))(CH_(3)-OVERSET(Cl)overset(|)(CH)-COOH)+NaNO_(2)overset(H_(2)"O"//Delta)(to)underset(("Nitro ethane"))(CH_(3)-CH_(2)-underset((X))(NO_(2))+NaCl+CO_(2)`
(ii) `CH_(3)-underset(("Ethyl BROMIDE"))(CH_(2)-Br+NaNO_(2))overset("Alcohol"//Delta)(to) underset(("Nitro ethane")(Y))(CH_(3)-CH_(2)-NO_(2)+)NaBr`
Discussion
17.

Find out the reaction in which obtained product give positive isocyanide test :-

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SOLUTION :
Discussion
18.

Find out the period number of the inert gas atom in which the total number of d-electron is equal to the difference in the number of total p-and s-electrons

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Solution :First gas which contains d-electron is Kr.
`1S^(2)2s^(2)2p^(6)3S^(2)3p^(6)3d^(10)4s^(2)4p^(6)`
Total NUMBER of d-electron = 10
Total number of p-electrons = 6+6+6=18
Total number of s-electrons = 2+2+2+2=8
DIFFERENCE in total number of p-and s-electrons =18-8=10
So inert gas is `._(36)Kr`. Now since At. No. is 36 so, period no. is (4)
Discussion
19.

Find out the percentage of the reactant molecules crossing over the energy barrier at 325K, given that DeltaH_(325)=0.12kcal, E_(a(b))=+0.02kcal.

Answer»

Solution :Given , `DeltaH=0.12xx10^(3)cal`,
`E_(a(B))=0.02xx10^(3)cal` (`E_(a)` can NEVER be negative)
`:. DeltaH=E_(a(f))-E_(a(b))`
`:.E_(a(f))=0.12xx10^(3)+0.02xx10^(3)cal`
`=0.14xx10^(3)cal`
`%` of molecule crossing over the BARRIER
`=100xxe^(-E_(a(f))//RT)`
`=100xxe^(-140//(2xx325))`
`=100xx0.8065=80.65%`
Discussion
20.

Find out the oxidation number of S in (i) SO_(2)Cl_(2) and (ii) Na_(2)S_(2)O_(3)

Answer»

SOLUTION :(i) `overset(x)(S)overset(-2)(O_(2))overset(-1)(Cl_(2))""therefore""x+2(-2)+2(-1)=0 or x= +6`
(ii) `Na^(+).^(-)O-UNDERSET(O)underset(||)overset(S)overset(uarr)(S)-O^(-)Na^(+)`
Since there is a coordinate bond between the two S atoms, therefore, ACCEPTOR S atom has an O.N. of -2. The O.N. of the other S atom an be calculated as follows :
`underset(("for Na"^(+)))(2 XX (+1)) underset(("for O atoms"))(+3 xx (-2)) + x underset(("for coordinate S"))(+1 xx (-2)) or +2 - 6 + x - 2 = 0 or x = +6 `
Thus, the two S atoms in `Na_(2)S_(2)O_(3)` have oxidation numbers of -2 and +6.
Discussion
21.

Find out the number of waves made by a Bohr electron in one complete revolution in its third orbit.

Answer»

Solution :`(NH)/(2PI) = MVR , (2pir)/(h//mv) = (2pir )/(LAMDA) = n`
3
Discussion
22.

Find out the number of reagents that converts 1^(@) alcohol to aldehyde. K_(2)Cr_(2)O_(7)// dil. H_(2)SO_(4), KMnO_(4)//H^(+)//Delta, H_(3)C-overset(O)overset(||)(S)-CH_(3)(DMSO), ceric ammonium nitrate, NBS,(C_(5)H_(5)Noverset(+)(H))_(2)Cr_(2)O_(7)^(2-),""(C_(5)H_(5)NH)^(+)ClCrO_(3)^(-)),[(CH_(3))_(3)CO]_(3)Al in acetone.

Answer»


ANSWER :6
Discussion
23.

Find out the number of products obtained by crossed Cannizzaro's reaction between (a) H-overset(O)overset(||)C-H+Ph-overset(O)overset(||)C-Hoverset(NaOH)underset(H_(2)O)rarr (b) Ph-overset(O)overset(||)C-H+(CH_(3))_(3)C-overset(O)overset(||)C-Hoverset(NaOH)underset(H_(2)O)rarr

Answer»


ANSWER :(a-2,b-4)
Discussion
24.

Find out the number of atoms per unit cell in a face-centred cubic structure having only single atoms at its lattice points.

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SOLUTION :Contribution made by the atoms present at eight corners = 1
Contribution made by the atoms at the CENTRE of six FACES = `1/2 xx6 = 3`
TOTAL number of atoms PER unit cell =1+3=4
Discussion
25.

Find out the number of 1-2 shifts during the conversion of

Answer»


SOLUTION :N//A
Discussion
26.

Find out the most stable oxidised species.

Answer»

`CR^(3+)`
`MnO_(4)^(-)`
`Cr_(2)O_(7)^(2-)`
`Mn^(2+)`

Solution :`E_(o x)^(@)` is highest for `Cr/Cr^(3+)`. Hence, `Cr^(3+)` IONS will be most stable OXIDIZED species.
Discussion
27.

Find out the most stable ion in its reduced form.

Answer»

`Cl^(-)`
`Cr^(3+)`
`Cr`
`Mn^(2+)`

SOLUTION :`E_(red)^(@)` is highest for `MnO_(4)^(-)//Mn^(2+)`. This shows that this reduction takes place most easiliy. Hence, `Mn^(2+)` will be most stable ion in the reduced FORM.
Discussion
28.

Find out the molar conductivity of an aqueous solution of BaCl_(2) at infinite dilution when ionic conductances of Ba^(2+) and Cl^(-) ion are 127.30 S cm^(2)mol^(-1) and 76.34 S cm^(2)mol^(-1) respectively.

Answer»


SOLUTION :`wedge_(m)^(@)(BaCl_(2))=lamda_(BA^(2+))^(@)+2lamda_(CL^(-))^(@)=127.30+2(76.34)" S "cm^(2)mol^(-1)=279.99" S "cm^(2)mol^(-1)`
Discussion
29.

Find out the molality of solution prepared by dissolving 2.89 g of NaCl in 0.159 litre of water. Density is 1.00 gm/mL.

Answer»


ANSWER :0.311 m
Discussion
30.

Find out the maximum number of possible isomers of the octahedral complex [Co(C_(2)O_(4))_2(NH_3)_2]

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Solution :Cis and TRANS geometrical ISOMERS.
Cis-isomer can exist as PAIR of optical isomers . TOTAL no. of isomers = 3
Discussion
31.

Find out the molality of solution formed by dissolving 29.22 g of NaCl in 2.00 kg of water.

Answer»


ANSWER :0.25 m
Discussion
32.

Find out the maximum number of isomers (including steroisomers) that are possible on monochlorination of the given compound: CH_(3)-CH_(2)-underset(H)underset(|)overset(CH_(3))overset(|)(C)-CH_(2)-CH_(3)

Answer»


ANSWER :8
Discussion
33.

Find out the longest wavelength of absorption line for hydrogen gas containing atoms in ground state.

Answer»


ANSWER :`121.6nm`
Discussion
34.

Find out the incorrect statement among the following.

Answer»

ferric alum is commonly known as Mohr's salt.
Cast iron cannot be welded.
Heating of steel of high TEMPERATURE FOLLOWING by QUICK quenching in water is CALLED annealing.
Alnica is used for making UTENSILS and automobile parts.

Answer :A::C::D
Discussion
35.

Find out the incorrect pair

Answer»

`Sc^(3+), Ti^(4+)`
`Ti^(3+). Ti^(2+)`
`Cr^(2+), Mn^(3+)`
`Cu^(+), Zn^(2+)`

Solution :`Ti^(3+). Ti^(2+)`have `d^(1)` and `d^(2)` configuration WHEREAS others have same configuration.
Discussion
36.

Find out the incorrect order of the dipole moment among the following pair of compound

Answer»

`NH_(3) gt NF_(3)`
p-dichloro benzene gt o-dichloro benzene
`CH_(3)CL gt CH_(2)Cl_(2)`
`SiF_(4)LT SF_(4)`

Answer :A
Discussion
37.

Find out the incorrect order of bond angles

Answer»

`NO_2^+`>`NO_2^`>`NO_2^-`
`CH_4 GT NH_3gt H_2O`
`H_2O gt H_2S gtH_2Se`
`NH_3lt PH_3lt AsH_3`

ANSWER :D
Discussion
38.

Find out the incorrect pair.

Answer»

Tetragens-`ns^(2)NP^(2)`
Icosagens`-ns^(2)np^(1)`
Chalcogens-`ns^(2)np^(4)`
Halogens`-ns^(2)np^(6)`

Answer :D
Discussion
39.

Findout theincorrectmatch.

Answer»

`electron -DUALNATURE
Rainbow-Discontinuousspectra
Atom -Linespectra
Particlenature - PHOTOELECTRICEFFECT

Answer :B
Discussion
40.

Find out the example of phosphoprotein

Answer»

PLASMA membrane
Casein of milk
Haemoglobin
Mucin of saliva

Answer :B
Discussion
41.

find out the entroupy change in surroundings when 1 mole of H_(2)O(l)is fromed under standard conditionsDelta_(f)H^(-)=286kJmol^(-1)

Answer»

` 959.7 JK^(-1) mol^(-1)`
` 286JK^(-1) mol^(-1)`
` -959.7 JK^(-1) mol^(-1)`
` -286JK^(-1) mol^(-1)`

Solution :`H_(2)(g)+1/2O_(2)(g)toH_(2)O(l)`
` Delta_(r)H^(Theta)=-286kJ mol^(-1)`
when 1 mole of ` H_(2)O(l)` is formed, 286 kJ of heat is released. This heat is ABSORBED by the surrounding .
`i.e.q_("SURR")= + 286 kJ mol ^(-1)`
`DeltaS=(q_(surr))/T=(286 kJ mol^(-1))/(298K)`
`=959.7 Jk^(-1)mol^(-1)`
Discussion
42.

Find out the correct reaction

Answer»



final product in the above reaction NUMBER of moles of `X_2` consumed is 4
`F_3 C - CF_2 - CO- NH_2 overset(Br_2//bar(OH))to F_3 C - CF_3 - NH_2`

SOLUTION :
Discussion
43.

Find out the correct pair

Answer»

Zn, Cu
HF, Zr
Ag, AU
Ti, Cu

Solution :Hf, Zr . This PAIR has same atomic radius whereas others have different atomic radius.
Discussion
44.

Find out the correct match.a.First law of thermodynamics b.isothermal change c.state function d.adiabatic changei.DeltaU=W ii.q=-Wiii.q+W. iv.DeltaU=q+W

Answer»

a(iv),b(II),C(iii),d(iv)
a(ii),b(iii),c(iv),d(i)
a(iv),b(i),c(ii),d(iii)
a(I),b(iv),c(ii),d(iii)

ANSWER :A
Discussion
45.

Find out the correct pair.

Answer»

ORTHO SILICATE- SORO silicate
Pyro silicate-Neso silicate
CHAIN silicate-Pyroxenes
Double chain silicate-Ring silicate

Answer :C
Discussion
46.

Find out the compounds that will disproportionate in their aqueous solution. (I)ClO_(4)^(-)overst(+0.36V)rarr ClO_(3)^(-) overset(+0.33V)rarr ClO_(2) overset(+0.66V)rarr OC l^(-)overset(+0.40V)rarr(1)/(2)Cl_(2)overset(+1.36)rarr Cl^(-) (II)MnO_(4)^(-)overset(+0.56)rarrMnO_(4)^(2-)overset(+2.22V)rarrMnO_(2)overset(+0.95V)rarrMn^(3+)overset(+1.55)rarrMn^(2+)overset((-0.19)V)rarrMn

Answer»




ANSWER :A
Discussion
47.

Find out the correct graph

Answer»

(## AAK_MCP_03_NEET_CHE_E03_021_A001 ##)'
(## AAK_MCP_03_NEET_CHE_E03_021_A002 ##)'
(## AAK_MCP_03_NEET_CHE_E03_021_A003 ##)'
(## AAK_MCP_03_NEET_CHE_E03_021_A004 ##)'

Answer :A
Discussion
48.

Find out radioactive element?

Answer»

`He`
`RN`
`XE`
`AR`

SOLUTION :`Rn`
Discussion
49.

Find out products of following reactions.

Answer»


ANSWER :A::B::C
Discussion
50.

Find out products C and D in the following reaction CH_(3) -COCH_(3) + CH_(3) Mgl overset((i) " dry ethaet")underset((ii) H_(3) O^(+))(rarr)A overset(conc.H_(2)SO_(4)" ")(rarr)B overset((i) O_(3))underset((ii) H_(3)O^(+))(rarr)C+D

Answer»

`CH_(3)-CH_(2)-CHOand H-CHO`
`CH_(3)-CH_(2)-COOHand H-COOH`
`(CH_(3))_(2)CO and H-CHO`
`(CH_(3))_(2)CO and H-COOH`

ANSWER :C
Discussion