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 the unknown products among the following :

Answer»


ANSWER :`(##GRB_ORG_CHM_P2_C10_E01_081_A01##)`
Discussion
2.

Identify the unknown compounds

Answer»

SOLUTION :

Discussion
3.

Identify the unknown compounds.

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SOLUTION :
Discussion
4.

Identify the type of polymer (i) -A -A -A-A-A-A- (ii) -A-B-B-A-A-A-B-A-

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(i) Homopolymer, (ii) Copolymer
(i) Natural POLYMER (ii) Synthetic polymer
(i) LINEAR polymer , (ii) BRANCHED polmer
(i) FIBRE , (ii) Elastomer

ANSWER :A
Discussion
5.

Identify the type of polymer - A - B - B- A - A -A - B -A

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SOLUTION :COPOLYMER.
Discussion
6.

Identify the type of polymer. -A-B-B-A-A-A-B-A-

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Solution :It is a copolymer since its REPEATING STRUCTURAL UNIT is DERIVED from TWO types of monomers units, i.e., A and B.
Discussion
7.

Identify the type of polymer - A - B - B- A- A- A- B - A -

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SOLUTION :Have the GIVEN POLYMER is copolymer as it CONTAINS more than one type of monomer units.
Discussion
8.

Identify the type of polymer. -A-A-A-A-A-

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SOLUTION :It is a HOMOPOLYMER SINCE is repeating structural UNIT is derived from only type of monomers UNITS , i.e., A.
Discussion
9.

Identify the type of polymer - A - A - A - A - A - A -

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SOLUTION :These given polymer is HOMOPOLYMER and it contains only TYPE of MONOMER units. i.e., only A monomer units.
Discussion
10.

Identify the type of isomerism in the following compounds : (i) [Co(NH_(3))_(4)Cl_(2)]6^(+)

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SOLUTION :CIS - TRANS ISOMERISM
Discussion
11.

Identify the type of bond character between Ni" and "CO lidgand in [Ni(CO)_(4)] :

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`SIGMA` character only
`pi-BOND` character only
both`sigma" and "pi` bond character
none of these

Answer :C
Discussion
12.

Identify the two power blocs by emphasising their role during the Cuban missile crisis.

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Solution :The two power blocs by emphasising their role during the Cuban missile crisis.
The Eastern bloc and the WESTERN bloc-WARSAW and the NATO were competitive blocs Two power blocs came into existence after the Second World War. The United States of AMERICA and Soviet Russia BECAME two Superpowers. During the Cuban Missile Crisis, leaders of the U.S. and the Soviet Union engaged in a tense, 13-day political and military standoff in October 1962 over the INSTALLATION of nuclear-armed Soviet missiles on Cuba Face off Cuba and then arena of cold war where there was negotiated settlement between Kennedy and Khrushchev Turkeydismantling negotiated. USA obliged.
Discussion
13.

Identify the true statement.

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Among the oxides MNO, `Mn_2O_3, MnO_2 and Mn_2O_7` , the last one is most acidic
`H^-` is a powerful reductant and a very strong base
In the MOLECULE `FNO_3`, two oxygen atoms are in -1 OXIDATION state each
There are four P-P bonds in the `P_4` molecule

Solution :(A)As oxidation state of Mn INCREASES, the difference in values of electronegativities of Mn and O decrease and thus acidic character increase, In `Mn_2O_7` , the Mn is in highest oxidation state +7.So, it is most acidic .
(B)It is factual.
Discussion
14.

Identify the true ones

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Daniel CELL is a reversible cell
Lead storage battery is a reversible cell
`ZN//H_2SO_4//Ag ` cell is reversible
Any reversible cell will receive current flow from the external source when connected if its emf is less than that of the source.

SOLUTION :a) `Zn , Zn^(+2) , Cu^(+2) , Cu` reversible cell
b) `Pb_((s)) + Pbo_(2(s)) + 2H_2 So_(4(AQ)) underset("charging")overset("working")iff 2PbSo_(4(s)) + 2H_(2(L)o)` reversible
Discussion
15.

Identify the thermo setting plastic?

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NYLON 6, 6
neoprene
MELAMINE
bakelite

Solution :melamine
Discussion
16.

Identify the substances (A) through (D) in a sequence. Comment on K_(a) values of (B) and (C ).

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Solution :
`K_(a_(1))` of (C) is greater than `K_(a_(1))` of B. (Maleic ACID is STRONG than fumaric acid.)
`K_(a_(2))` of (B) is greater than `K_(a_(2)` of (C).
Discussion
17.

Identify the substance which shows frenkel defect.

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nacl
KCL
ZnS
AgBr

Answer :C
Discussion
18.

Identify the structure of (X)

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SOLUTION :
Discussion
19.

Identify the structure of the major products A,B, C and D formed in the following sequence of reactions

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ANSWER :`(##RES_CHM_CCAK_E03_035_A01##)`
Discussion
20.

Identify the structure of X :

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Solution :Neutral `FeCl_(3)` GIVES positive TEST with Phenol.
Discussion
21.

Identify the structure of P :

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SOLUTION :Ketones do not GIVE positive test with TOLLEN's reagents.
Discussion
22.

Identify the structure of amine.

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SOLUTION :N//A
Discussion
23.

Identify the strongest acid amongst the following

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chlroacetic ACID
ACETIC acid
TRICHLOROACETIC acid
Dichloroacetic acid

ANSWER :C
Discussion
24.

Identify the stronger base in each of the following pairs : (i) CH_(3)-overset(O)overset(||)C-NH_(2) or CH_(3)NH_(2) (ii)

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ANSWER :(I) `CH_(3)NH_(2)`; (II) `(##ALN_CHM_C09(II)_E01_906_A01##)`
Discussion
25.

Identify the stronger acid among the following: Butanol-1, butan-2-ol, isobutyl alcohol and tert-butyl alcohol. Give Reason.

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SOLUTION : Butan-1-ol is stronger acid. The CONJUGATE base of this alcohol is more STABLE.
Discussion
26.

Identify the statement which is correct w.r.t. surface phenomenon.

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Osmotic pressure of rubber sol will be same as that of sucrose SOLUTION having same mass mixed in same mass of `H_(2)O`
A gas may show physisorption at low temperature and CHEMISORPTION at HIGHER temperatures.
Soap sol of sodium palmitate will be coagulated near CATHODE on electrophoresis.
Gold sol on mixing with starch sol causes stablisation of starch sol.

Answer :B
Discussion
27.

Identify the statement which is not correct regarding copper sulphate

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It REACTS with `KI` to give iodine
It reacts with `KCl` to give `Cu_(2)Cl_(2)`
It reacts with `NaOH` and GLUCOSE to give `Cu_(2)O`
It give `CUO` on strong heating in air

Solution :Among all the reactions given `CuSO_(4)` does not react with `KCl` to give `Cu_(2)Cl_(2).`
Discussion
28.

Identify the statement that is not correct as far as structure of diborane is concene

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There are two briddging atoms and four TERMINAL HYDROGEN atoms in diborane
Each boron atom FORMS bonds in diborane
The hydrogen atoms are not in the same plane in diborane
All, B-H bonds in diborane are similar

Answer :D
Discussion
29.

Identifythe set of reagents X and Y in the following set of transformations : CH_(3)CH_(2)CH_(2)Br overset(X) rarr "Product" overset(Y)rarrunderset(Br)underset("|")(CH_(3)CHCH_(3))

Answer»

`X =` dilute aqueous NAOH, `20^(@)C`,
`Y =` HBr/acetic acid, `20^(@)C`
`X =` conc. Alcoholic NaOH, `80^(@)C`,
`Y = ` HBr/acetic acid, `20^(@)C`
X = dilute aqueous NaOH, `20^(@)C`,
`Y=Br_(2)//CHCl_(3), 0^(@)C`
`X=` conc. Alcoholic NaOH, `80^(@)C`,
`Y=Br_(2)//CHCl_(3), 0^(@)C`

Solution :
Discussion
30.

Identify the set of reagents/reaction conditions X ad Y in the following set of tranformation CH_(3)-CH_(2)-CH_(2)Broverset(X)to"Product"overset(Y)toCH_(3)-underset(Br)underset(|)(C)H-CH_(3)

Answer»

X=dilute AQUEOUS NaOH, `20^(@)C,Y=HBr//`acetic ACID, `20^(@)C`
X=concentrated alcoholic
NaOH, `80^(@)C,Y=HBr`/acetic acid, `20^(@)C`
X=dilute aqueous NaoH, `20^(@)C,Y=Br_(2)//CHCl_(3),0^(@)C`
X=concentrated alcoholic NaoH, `80^(@)C`
`Y=Br_(2)//CHCl_(3),0^(@)C`

SOLUTION :`CH_(3)-CH_(2)-CH_(2)Br underset(80^(@)(X))overset(alc." "NaOH)toCH_(3)-CH=CH_(2)underset("in "CH_(3)COOH,20^(@)C(Y))toCH_(3)-underset(Br)underset(|)(C)H-CH_(3)`.
Discussion
31.

Identify the set of reagent/reaction conditions 'X' and 'Y' in the following set of transformation: CH_(3)-CH_(2)-CH_(2)Br overset("X")to"Product"overset(Y)to CH_(3)-underset(Br)underset(|)(C)H-CH_(3)X=dil. Aqueous NaOH, 20^(@)C, Y=HBr/acetic acid, 20^(@)C.

Answer»

X=dil. Aquous NaOH, `20^(@)C,Y=Br_(2)//CHCl_(3),0^(@)C`41
X=conc. Alcoholic NaoH, `80^(@)C`, Y=HBr/acetic ACID, `20^(@)C`
X = dil. Aqueous acid, NaOH, `20^(@)C`, `Y = Br_(2)//CHCl_(3), 0^(@)C`
X = conc. Alcoholic NaOH, `80^(@)C`
`Y = Br_(2)//CHCl_(3), 0^(@)C`

Solution :Conc. Alc. NaOH at `80^(@)`C brings about dehydrohalogenation while HBr/acetic acid at `20^(@)C` brings about Markovnikov's ADDITION.
Discussion
32.

Identify the set of elements which do not exhibit multiple oxidation states

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SC, Ti
Mn,Cr
Zn,Cr
Zn,Sc

Answer :B
Discussion
33.

Identify the set from the following which connot form acetone in a single-step reaction.

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a.
b.
c.`(MeCOO)_(2)CA, Me- -= -H`
d.

Solution :
Discussion
34.

Identify the relation between them :- CH_3-underset(NH_2)underset|CH-CHOand CH_3-CH_2-NH-CHO

Answer»

P.I.
C.I.
F.I.
METAMERISM

SOLUTION :Both are FUNCTIONAL GROUP ISOMERS.
Discussion
35.

Identify the relation between molecules given in Newman and Fischer projections.

Answer»

identical.
Enantiomers
DIASTEREOMERS
Conformers

Solution :COMPOUNDS are diastereomers.
Discussion
36.

Identify the reducing sugar.

Answer»

SUCROSE
CELLULOSE
STARCH
GLUCOSE

SOLUTION :Glucose
Discussion
37.

Identify the reagents X and Y are ............

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`X = MgCl_2 "" Y = CH_3CH = CH_2`
`X = CH_3MgCl "" Y = C_6H_5COCH_3`
`X = CH_3MgCl "" Y = (CH_3)_3C - OH`
`X = C_6H_5MgCl "" Y = (CH_3)_3 C- OH`

Solution :`X = CH_3MgCl "" Y = (CH_3)_3C - OH`
Discussion
38.

Identify the reagent which can differentiate the given pair compounds . (a) Acetone and ethanol (b) Phenol and 1- propanol (c ) 1-butyne and2-butyne (d) (1) NaOH,I_(2)(2) Tollen's reagent (3) Fehling solution(4) Hinsberg's reagent (5) Neutral FeCl_(3)(6)2,4-DNP (7) NaHCO_(3)(8)Schiff's reagent [Hint : If pair (a) is differentiate by 1, (b) by 2, (c ) by 3 and (d) by 4 then fill 1234 in OMR sheet.]

Answer»


Solution :(a) ACETONE`overset(2,4DNP)rarr`yellow/orange
ETHANOL`overset(2,4DNP)rarr` no colour
(B) phenol`overset(FeCl_(3))rarr`purple colour
1-propanol`overset(FeCl_(3))rarr`no colour
(c ) `me-CH_(2)-C-=Choverset("Tollen's reagent")rarr` dirty WHITE PPT.
`Me-C-=C-Meoverset("Tollen's reagent")rarr`no ppt
(d)
Discussion
39.

Identify the reagent that can be used to detect phosphate radical

Answer»

 NEUTRAL `FeCl_(3)`
 Magnesia mixture
ACIDIFIED `KMnO_4`.
Conc.` H_2SO_4`

Answer :B
Discussion
40.

Identify the reaction which is used to obtain beta-hydroxyketone

Answer»

CROSSED ALDOL condensation
Cannizzaro reaction
Condensation reaction
Aldol condensation.

Answer :A
Discussion
41.

Identify the reactions that includes inhibtors in the reactions mixture.

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`N_2+3H_2underset(Mo)OVERSET(FE)to 2NH_3`
Vegetable OIL+`H_2underset(Cu)overset(Ni)to`Vegetable ghee.
`N_2+3H_2underset(CO //H_2S)overset(Fe)to2NH_3`
`RCOCl+H_2 UNDERSET(BaSO_4)overset(PD)to RCHO+HCl`

Solution :NA
Discussion
42.

Identify the reaction that doesn't take place during the smelting process of copper extraction

Answer»

`2FeS+3O_(2)rarr2FeO+2SO_(2)uarr`
`Cu_(2)O+FeSrarr Cu_(2)S+FeO`
`2Cu_(2)S+3O_(2)RARR 2Cu_(2)O+2SO_(2)uarr`
`FeO+SiO_(2)rarrFeSiO_(3)`

SOLUTION :`2Cu_(2)S+3O_(2)rarr 2Cu_(2)O+2SO_(2)uarr.`
Discussion
43.

Identify the reaction that does not take place in blast furnace

Answer»

`2Fe_(2)O_(3) + 3C rarr 4Fe + 3CO_(2)`
`CO_(2) + C rarr 2CO`
`CaCO_(3) rarr CAO + CO_(2)`
`FeO + SiO_(2) rarr FeSiO_(3)`

Answer :D
Discussion
44.

Identify the reaction order if the unit of rate constant is s^(-1).

Answer»

zero order REACTION
SECOND order reaction
first order reaction
third order reaction

ANSWER :C
Discussion
45.

Identify thereaction thatdoes notplace inablastfurnace :

Answer»

`2Fe_2 O _3+3 C to4 Fe+3 CO_ 2 `
` CO_2+ C to2CO `
` CaCO_ 3TO CAO+ CO _ 2`
`FeO + SiO_ 2toFeSiO_ 3 `

Solution :Reaction (d) doesnotoccurintheblastfurnace because` SiO_ 2 `doesnotcombine with FeObutcombineswith CaOtoform` CaSiO_ 3`slag.
Discussion
46.

Identify the reaction that does not take place in a blast furnace.

Answer»

`2Fe_2O_3 + 3C to 4Fe + 3CO_2` 
`CO_2 + C to 2CO` 
`CAO + SiO_2 to CaSiO_3`
`CaO + SiO_2 to CaSiO_3`

ANSWER :C
Discussion
47.

Identify the reaction that does not take place ina blast furnace.

Answer»

`2Fe_(2)O_(3)+3Cto4Fe+3CO_(2)`
`CO_(2)+Cto2CO`
`CaCO_(3)toCaO+CO_(2)`
`CaO+SiO_(2)toCaSiO_(3)`

Solution :Blast furance is frequently used for the extraction of iron and copper from their ORES . Carbonand carbon monoxide reduce the metallic oxides to the FREE metals . Slangformation plays an important ROLE in balst furnace as it covers the melted metal and thus protects the metal from being reoxidized.
Discussion
48.

Identify the reaction order from each of the following rate constant. (i)K=2.3xx10^(-5)L mol^(-1) s^(-1) (ii)K=3xx10^(-4) s^(-1)

Answer»

SOLUTION :(i)The unit of second order RATE constant is I.`mol^(-1) s^(-1)`, therefore `k=2.3xx10^(-5) S^(-1)` represents a second order reaction .
(II)The unit of FIRST order rate constant is `S^(-1)` therefore `k=3xx10^(-4)S^(-1)` represents a first order reaction.
Discussion
49.

Identify the reaction order from the following rate constant: k=2.3xx10^(-5)" L mol"^(-1)s^(-1)

Answer»

SOLUTION :SECOND ORDER REACTION.
Discussion
50.

Identify the reaction order from each of the following rate constants. (i) k = 2.3 xx 10^(-3) L mol^(-1)s^(-1) (ii) k = 3 xx 10^(-1)s^(-1)

Answer»

SOLUTION :(i) Second ORDER reaction
(ii) First order reaction.
Discussion