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.

Identify numbr of substitutents those are deactivating but ortho and para directing. -underset(..)overset(..)(F :),-CH_(3),-overset(O)overset(||)(C)-NH_(2),-CH=CH-overset(O)overset(||)(C)-OH,-underset(..)overset(O)overset(||)(S)-C_(2)H_(5) -underset(O)underset(||)overset(O)overset(||)(S)-C_(2)H_(5),-overset(..)(N)=O,-overset(O)overset(||)(C)-NH_(3),-CH=CH-overset(O)overset(||)(C)-H

Answer»


Solution :`-UNDERSET(..)overset(..)(F : ), -CH=CH-overset(O)overset(||)(C)-OH,-underset(..)overset(O)overset(||)(S)-C_(2)H_(5),-overset(..)(N)=O,-CH=CH-overset(O)overset(||)(C)-H`
Discussion
2.

Identify number of reactions that can give benzene as major product.

Answer»


SOLUTION :A,B,C,D,E,G,H
Discussion
3.

Identify molecular weight of final product (Y).

Answer»

SOLUTION :N//A
Discussion
4.

Identify mixture of ions (A):

Answer»

`NO_(2)^(-)` and `Br^(-)`
`NO_(2)^(-)` and `I^(-)`
`NO_(2)^(-)` and `NO_(3)^(-)`
NONE of these

Answer :C
Discussion
5.

Identify Lewis acid and Lewis base in the following NH_3, BF_3, N^(+) O_2 , Co^(3+), Mg^(2+) , H_2O, OH^(-), Cl^(-) , C_6H_5NH_2 , AlCl_3, FeCl_3, BCl_3, C_6H_5O^-

Answer»

Solution :LEWIS acid : `BF_3 , N^(+)O_2 , CO^(3+) , MG^(2+) , AlCl_3, FeCl_3, BCl_3`
Lewis Base : `NH_3, H_2O, OH^(-) , Cl^(-) , C_6H_5NH_2, C_6H_5O^-`
Discussion
6.

Identify incorrect statement regarding photochemical smog

Answer»

It is OXIDISING in nature
It is FORMED when intensity of solar RADIATION is very high
It is formed by PBN, `O_3` and OXIDES of nitrogen
It is formed by the particulate carbon and `SO_2`

Solution :It is formed by the particulate and `SO_2`
Discussion
7.

Identify gas (B):

Answer»

`Br_(2)`<BR>`Br_(2)+NO_(2)`
Only `NO_(2)`
NONE of these

Answer :C
Discussion
8.

Identify electrophilic centre in the following: CH_(3)CH= O, CH_(3)CN, CH_(3)I

Answer»

<P>

Solution :Due to polarity of the BOND carbon BECOMES partial positive `(+p)`

`+delta` containing carbon atoms are electrophilic centers and they will have positive changer so, they are electrophilic
Discussion
9.

Identify electron - withdrawing groups in resonance among the following :

Answer»

`-COOH`
`-CONHCH_(3)`
`-COCL`
`-CN`

Answer :A::B::C::D
Discussion
10.

Identify disproportionation reaction

Answer»

`CH_(4)+2O_(2) rarr CO_(2)+2H_(2)O`
`CH_(4)+4Cl_(2)rarr "CCl"_(4)+4HCl`
`2F_(2)+2OHrarr 2F^(-) +OF_(2)+H_(2)O`
`2NO_(2)+2OH^(-) rarr NO_(2)^(-)+NO_(3)^(-) +H_(2)O`

SOLUTION :`2overset(+4)(NO_2)+2OH^(-)rarroverset(+3)(NO_2^(-))+OVERSET(+5)(NO_3^(-))+H_2O`
Discussion
11.

Identify disproportionation reaction.

Answer»

`CH_(4)+2O_(2)toCO_(2)+2H_(2)O`
`CH_(4)+4Cl_(2)toC Cl_(4)+4HCl`
`2F_(2)+2OH^(-)to2F^(-)+OF_(2)+H_(2)O`
`2NO_(2)+2OH^(-)toNO_(2)^(-)+NO_(3)^(-)+H_(2)O`

Solution :In GIVEN reaction only one ELEMENT from oxidation and reduction is known as redox reaction.
`overset(+4)(2NO_(2))+2OH^(-)tooverset(+3)(NO_(2)^(-))+overset(+5)(NO_(3)^(-))+H_(2)O`
Discussion
12.

Identify compound 'E'

Answer»

`CuI_(2)`
`CuSO_(4)`
`Cu_(2)I_(2)`
`Na_(2)S_(4)O_(6)`

ANSWER :C
Discussion
13.

Identify Bronsted Lowry acids in the reaction given below ? [AIH_(2)O)_(6)]^(3+)+HCO_(3) rarr [A] (H_(2)O)(OH)]^(2+) +H_(2)CO_(3)

Answer»

A,C
A,D
B,D
B,C

Solution :` [AI (UNDERSET( CA) (H_2O ))_6]^(3+ )+HNO_3^(-) HARR [Al (H_2O )_5(OH)]^(2+)+underset( CA) (H_2O CO_3 ) `
Discussion
14.

Identify basic oxide.

Answer»

`SiO_2`
`GeO_2`
`SnO_2`
`PbO_2`

ANSWER :D
Discussion
15.

Identify anions of 'A' and 'B':

Answer»

`SO_(3)^(-)` and `(S+SO_(4)^(2-))`
`S_(2)O_(3)^(2-)` and `SO_(3)^(2-)`
`S^(2-)` and `S_(2)O_(3)^(2-)`
`S^(2-)` and `SO_(3)^(2-)`

ANSWER :B
Discussion
16.

Identify and indicate the presence of centre of chirality, if any, in the following molecules? How many stereoisomers are possible for each ? (i) 2-Aminobutane (ii) 3-Bromopent-1-ene (iii) 1, 2-Dichloropropane, (iv) 3-Methyl-1-pentene

Answer»

SOLUTION :
Discussion
17.

Identify acidic oxide

Answer»

`SiO_2`
`GeO_2`
`SnO_2`
`PbO_2`

ANSWER :A
Discussion
18.

Identify A,Band C from the following equation underset((C ))underset(darrNa//NH_(3))underset((A))(C_(4)H_(6))overset(Pd-CaCO_(3))(to)(B)

Answer»

SOLUTION :
Discussion
19.

Identify A,B and C from the following equation. underset((A))(C_(4)H_(9)Br) underset(Delta)overset(KOH(aq))to Bunderset("Peroxide")overset("HBr")toC

Answer»

Solution :`UNDERSET((A))(CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)=Br) underset(Delta)overset(KOH(ALC))to underset((B))(CH_(3)-overset(CH_(3))overset(|)(C)=CH_(2)) underset("PEROXIDE")overset(HBR)to underset((C)" iso-butyl bromide")(CH_(3)-underset(Br)underset(|)overset(CH_(3))overset(|)(C)=CH_(3))`.
Discussion
20.

Identify Aand B from the following . C_(2)H_(6)Ooverset("con."H_(2)SO_(4))underset(430-440K)(to)Aoverset(H_(2))underset(NI,298K)(to)B

Answer»

Solution :`UNDERSET("Ethanol")(C_(2)H_(6)O)overset("con."H_(2)SO_(4))underset(430-440K)(to)underset("Ethene")underset((A))(CH_(2)=CH_(2))overset(H_(2))underset(NI,298K)(to)underset("ETHANE")underset((B))(CH_(3)-CH_(3))`
Discussion
21.

Identify (A) to (H).

Answer»

SOLUTION :
NAMES of `(C), (D), (F),` and `(H) are the same.
Discussion
22.

Identify (A) to (G)Alkene (A) and Alkene (B) overset(Dil. H_(2)SO_(4))rarr Sme alcohol (C)

Answer»

Solution :Procedding reverse, the structure of `(A)` is `:`
`D.U. ` in `D=1^(@)`, for KETO group `(` since,ALDEHYDE is not obtained in oxidation with acidic `KMnO_(4))`.
The structure of `(D)=`
The structure of `(E)=` It is an ACID and `D.U. =1^(@)`.

The structures of `(F)` and `(G)`, respectivel, are the following `:`

The structure of `(B)` is `:`
Reaction `:`
Discussion
23.

Identify (A) to (C).

Answer»

SOLUTION :
Discussion
24.

Identify a reagent from the following list which can easily distinguish between 1-butyne and 2-butyne:

Answer»

BROMINE , `C Cl_4`
`H_2` , Lindlar CATALYST
DILUTE ` H_2SO_4 , HgSO_4`
ammonical `Cu_2Cl_2` SOLUTION

Solution :1-Butyne GIVES Red ppt. with `Cu_2Cl_2`
Discussion
25.

Identify a reagent from the following list which can easily distinguish between 1 -butyne and 2-butyne.

Answer»

bromine `C Cl_(4)`
`H_(2)`, Lindlar catalyst
dilute `H_(2)SO_(4),HgSO_(4)`
AMMONICAL `Cu_(2)Cl_(2)` SOLUTION

Answer :D
Discussion
26.

Identify a reagent from the following list which can easily distinguish between 1- butyne and 2-butyne.

Answer»

bromine, `C Cl_(4)`
`H_(2)` Lindlar catalyst
dilute `H_(2)SO_(4), HgSO_(4)`
ammonical `Cu_(2)Cl_(2)` solution

Solution :`CH_(3)-CH_(2)-C-=CH underset(NH_(4)OH)overset(Cu_(2)Cl_(2))rarr underset("BLOOD red colour")(CH_(3)-CH_(2)-C-=overset(Θ)Cu^(o+))+NH_(4)CL+H_(2)O`
Discussion
27.

Identify A and B in the reaction given below "Ethane nitrile"underset(underset(underset(-NH_(3))(+2H_(2)O))(aq. H_(2)SO_(4)))overset("Hydrolysis")(rarr)A underset(underset(underset(-CO_(2))(Delta))("Sodalime"))overset("Decarboxylation")(rarr)B

Answer»

ACETONE, Methane
Ethanoic ACID, Methane
Acetiec acid, Methanol
Ethanoic acid, Ethane

Answer :B
Discussion
28.

Identify A and B in the given reaction. CF_2 Cl_(2(g)) overset(A)to B + CF_2 Cl_(2(g))

Answer»

`HV , CL^-`
`UV, Cl^-`
`uv, OVERSET(*)Cl`
`hv Cl^+`

SOLUTION :`uv, overset(*)Cl`
Discussion
29.

Identify a and b, in the following reactions :

Answer»


ANSWER :`(##RES_CHM_ROHR_E01_006_A01##)`
Discussion
30.

Identify A and B in the following reaction scheme?

Answer»

Both A and B are mixture of ortho and para chloro toluenes
A is mixture of ortho and para chloro toluenes, while B is Benzyl chloride

Solution :Chlorination in PRESENCE of SUN light takes place in the side chain , while in presence of FECL3 , a Lewis ACID , take place in the benzene ring.
Discussion
31.

Identify a & b, in the following reaction :

Answer»




Solution :Esters are not reduced by `NaBH_(4), GT C = )` (carbonyl) change to `-CH(OH)` by USE of `NaBH_(4)`.
Discussion
32.

Identify A:

Answer»

`Na_(2)S_(2)O_(3)`
`Na_(2)SO_(4)`
`Na_(2)S`
NONE of these

Answer :B
Discussion
33.

Identify A,

Answer»

`FeSO_(4)`
`Fe_(2)(SO_(4))_(3)`
`FeCI_(3)`
`CrCI_(3)`

ANSWER :B
Discussion
34.

Identify A:

Answer»

`CO_(3)^(2-)`
`SO_(3)^(2-)`
`S_(2)O_(3)^(2-)`
none of these

Answer :B
Discussion
35.

IdentiflytheCORRECTorderof decreasingionizationenthalpiesof alkalimetals

Answer»

`LI GT NagtK gtRBgtCs`
`Ligt RbgtK gtNagt Li`
`LigtCsgt NagtRbgtK`

ANSWER :A
Discussion
36.

Identifity disporportionation reaction

Answer»

Solution :Reaction in which the same substance is oixidised as well as reduced are CALLED DISPROPORTIONATION reaction writing the O.N of eachelement above its SYMBOLS in the following reaction we have
(a) `C H_(4)+2O_(2)rarrCO_(2)+2H_(2)O (b) CH_(4)+4CI_(4)RARRC CI_(4) + 4HCI (c ) 2F_(2)+2OH^(-)rarr2F^(-)+OF_(2)+H_(2)O (d) 2 N O_(2)+2OH^(-)rarr NO_(2)^(-)+ANO_(3)^(-)+H_(2)O^(-2)`
Thus in reaction (d) N is both oxidised as well as reduced since the O.N of N increases from +4 in `NO_(2)` to +5 in `NO_(3)^(-)` and decreases from+4 in `NO_(2)` to +3 in `NO_(2)^(-)` Thus option (d) is correct
Discussion
37.

Identified the product Z in the following sequence of reaction "Phenol" overset(NaOH)rarrX underset(4-7 atm, 410K)overset(CO_(2))rarrY overset(H_(3)O^(+))rarrZ

Answer»

Aspirin
Salicyladehyde
Benzoic acid
Salicylic acid

Solution :KOLBE's SCHMIDT REACTION
Discussion
38.

Identfiy the substance oxidised reduced oxidising agent and redcuing agent for each of the folloiwng rection (a)AgBr(s)+C_(6)H_(6)O_(2)(aq)rarr2()Ag(s)+2HBr(aq)+C _(6)H_(4)O_(2)(aq) (b)HCO(l)+2[Ag(NH_(3))^(2)]^(3+)(aq)+3OH^(-)(aq)rarr2Ag(s)+HCOO^(-)(aq)+4NH_(3)(aq)+2H_(2)O (c )HCHO(l)+2Cu^(2+)(aq)+5OH^(-)rarrCu_(2)(s)+HCOO^(-)(aq)+3H_(21)OO(l) (d)N_(2)H_(4)(l)+2H_(2)O_(2)rarrN_(2)(g)+4H_(2)O(l) (e )Pb(s)+PbO_(2)(s)+2H_(2)SO_(4)(aq)rarr2PbSO_(4)(s)+2H_(2)O(l)

Answer»

SOLUTION :
Discussion
39.

Identification of a pollutant as organic, inorganic (or) organometallic origin is called

Answer»

CLASSIFICATION
CATEGORIZATION
DIFFERENTIATION
SPECIATION

ANSWER :D
Discussion
40.

Identification of a pollutant as organic, inorgamic (or) organometallic origin is called

Answer»

CLASSIFICATION
CATEGORIZATION
DIFFERENCIATION
SPECIATION

ANSWER :D
Discussion
41.

Identfity molecular solide, covalent solid, ionic solid: P_(4)(s), S_(8)(s), SiC (s), Al_(2)O_(3)(s), He(s), Al_(2)Cl_(6)(s).

Answer»

SOLUTION :Molecular SOLIDE `RARR P_(4)(s), S_(8)(s), He(s), Al_(2)Cl_(6)(s)`
Covalent SOLID `rarr SiC`
Ionic solid `rarr Al_(2)O_(3)(s)`
Discussion
42.

Idenfity oxidised ,reducedoxidising agent and reducing agent for each of the following reactions 2AgBr(s)+C_(6)H_(6)(aq)to2Ag(s)+2HBr(aq)+C_(6)h_(4)O_(2)(aq) HCHO(l)+2[Ag(NH_(3))_(2)]^(+)(aq)+3OH^(-)(aq)to2Ag(a)+HCOO^(-)(aq)+4NH_(3)(aq)+2H_(2)O(l) HCIO(l)+2Cu^(2+)(aq)+5OH^(-)(aq)toCu_(2)O(s)+HCOO^(-)(aq)+3H_(2)O(l) N_(2)H(4)(l)+2H_(2)O_(2)(l)toN_(2)(g)+4H_(2)O(l) Pb(s)+PbO_(2)(s)+2H_(2)SO_(4)(aq)toPbSO_(4)(s)+2H_(2)O(l)

Answer»

SOLUTION :
Discussion
43.

Ideal gas equation is represented as PV=nRT. Gases present in the universe were found idealn the Boyle's temperature range only. The compressibility factor for an ideal gas, Z= (PV)/(nRT). The main cause to show deviations were due to wrong assumptions madebout forces of attractions (which becomes significant at high pressure).olume occupied by molecules V, in PV = nRT, is supposed to be volume ofas or, the volume of container in which gas is placed by assuming thataseous molecules do not have appreciable volume. Actual volume of theas is that volume in which each molecule of a gas can move freely. Ifolume occupied by gaseous molecule is not negligible, then the term Vhould be replaced by the ideal volume which is available for free motion ofach molecule of gas. Similarly for n moles of gas V_("actual") = V-nb The excluded volume can be calculated by considering bimolecular collisions. The excluded volume is the volume occupied by the sphere of 2r for each pair of molecule. Thus, excluded volume for one pair of molecules = 4/3 pi (2r)^3 = (4 xx 8 pi r^3)/3 The excluded volume for 1 molecule = 2/3 xx 8 pi r^3 = 4 xx (4/3 pi r^3) = 4V The excluded volume for N molecules = 4NV = b (where N is Avogadro's No.) The compressibility factor for N_2 at -50^@C and 800 atm pressure is 1.95. Number of moles of N_2 required to fill a balloon of 100 L capacity is :

Answer»

99.9%, 99%
0.082%, 0.82%
99%, 90%
11%, 10%

Solution :`(V_("molecules"))/(V_("gas")) , 4/3 (pir_m^2 xx n xx 6 xx 10^(23))/(V_L) xx 10^3`
`=4/3 PI r^3 xx 6 xx 10^23 xx P/(RT)`
at 1 BAR = 0.082%. At 10 bar = 0.82%.
Discussion
44.

Ideal gas do not show Joule -Thoson effect as well as they cannot be liquefied ((deltaU)/(deltaV))_(T)and ((deltaT)/(deltaP))_(H) for ideal gas is zero .

Answer»

Solution :Internal energy of an ideal gas DEPENDS only on temperature and since they have on ATTRACTIONS among their molecules `((deltaT)/(deltaP))_(H)` is ZERO i.e `MU J.T =0` .
Discussion
45.

Ice melts showly at altitudes Explain why ?

Answer»

Solution :`"ICE"_((s))to" Water"`
The MELTING of ice is favoured at high pressure because there is decrease in volume in the FORWARD reaction. Since at high altitudes, atmospheric pressure is low and therefore, ice MELTS SLOWLY.
Discussion
46.

Ice is less dense than water at 0^(@)C. Justify this statement.

Answer»

Solution :Inice, each oxygen atom is SURROUNDED tetrahedrally by through hydrogen bonds to four water molecules. That is, the presence of two hydrogen atoms and two LONE electron pairs on oxygen) in each water molecule results in a three-dimensional structure. The arrangements creates an open structure, which in turn accounts for the fact that ice is LESS dense than water at `0^(@)C`.
Discussion
47.

Ice has cage like structure with air spaces.

Answer»


ANSWER :1
Discussion
48.

Ice floats on water or ice is lighter than water.

Answer»

Solution :Along with covalent bond & hydrogen bond,ice FORM of water exists in the tetrahydral SHAPE from bent structure by leaving vacant SPACE. Due to his vacant space is ice if floats in water.
Discussion
49.

Ice floats on water. Give reason

Answer»

Solution :Ice has highly ORDERED 3D hydrogen bonded structure in which oxygen atom is tetrahedrally SURROUNDED by four hydrogen atoms. This gives ice a open cage LIKE structure. Density of ice is less than water. So ice FLOATS in water
Discussion
50.

Ice cube is melting at the room temperature this reaction belongs to which law of?

Answer»

`"ZERO"^(TH) "LAW"`
THIRD Law
First Law
Second Law

Answer :C
Discussion