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.

How many of the following intermediates heve at least one contributing structure in which all atoms have their octet complete ?

Answer»


ANSWER :4
Discussion
2.

How many of the following have standard heat of formation is zero. (i) Br_(2(l))(ii) CO_(2(g)) (iii) C_("graphite") (iv) Cl_(2(l)) (v) Cl_(2(g)) (vi) F_(2(g)) (vii) F_((g)) (viii) l_(2(g)) (ix) S_(("monoclinic")) (x) N_(2(g)) (xi) P_(("Black")) (xii)P_((red)) (xiii) CH_(4)

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Solution :`Br_(2)(L), C("gaphite"),F_(2)N_(2)(g) : Cl_(2)(g)` are exist in most stable FORM so, it's STANDARD HEAT of formation is zero.
Discussion
3.

How many of the following have d^(2)sp^(3) hybridization? [Ni(NH_(3))_(6)]^(2+),[Co(NH_(3))_(6)]^(3+),[Fe(CN)_(6)]^(4-) [Cr(NH_(3))_(6)]^(3+),[Co(en)_(3)]^(3+),[Co(EDTA)]^(2-) [CoF_(6)]^(3-),[Co(H_(2)O)_(6)]^(2+)

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SOLUTION :`d^(2)sp^(3)`
`[Co(NH_(3))_(6)]^(3+) , [Fe(CN)_(6)]^(4-) `,
`[Cr(NH_(3))_(6)]^(3+) , [Co("EN")_(3)]^(3+) , [Co(EDTA)]^(2-)`
Discussion
4.

How many of the following have greater 7_(eff) than silicon atom: Na, Mg, AI, P, CI, S, N, O, C, F

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ANSWER :7
Discussion
5.

How many of the following has 2.8 B.M. magnetic moment ? (a) [Ni(NH_(3))_(6)]Cl_(2)""(b) K_(4)[NiCl_(6)] (c ) K_(3)[Mn(CN)_(6)]""(d) [NI(CO)_(4)] (e ) [Ni(CN)_(4)]^(2-)""(f) Hg[Co(SCN)_(4)] (g) K_(3)[Fr(CN)_(6)]

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SOLUTION :(a),(b),(c ) has 2 unpaired electrons. (f) has 3, (G) has 1 while (d),(e ) are diamagnetic.
Discussion
6.

How many of the following halides are singnificantly hydrolysed under the normal conditions: BF_3 , NCl_3, NBr_3 ,BCl_3, PCl_5, C Cl_4, NF_3, SiCl_4

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SOLUTION :`NCl_3, NBr_3, BCl_3, PCl_3, PCl_5, SiCl_4` are singnificantly HYDROLYSED under the NORMAL conditionsl.
Discussion
7.

How many of the following give yellow oily liquid with NaNO_(2)+HCl,CH_(2)CH_(2)NH_(2),CH_(3)NHCH_(3),CH_(3)CH_(2)NHCH_(3),CH_(3)CH_(2)NHCH_(2)CH_(3),CH_(3)-underset(CH_(3))underset(|)N-CH_(3),C_(6)H_(5)-underset(CH_(3))underset(|)N-CH_(3),C_(3)H_(7)NHCH_(3).

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SOLUTION :`2^(@)` AMINES yellow oily liqiid with `NaNO_(2)+HCL`
`H_(3)C-NH-CH_(3),H_(3)C-CH_(2)NHCH_(3),H_(3)C-CH_(2)NHCH_(2)CH_(3)C_(3)H_(7)NHCH_(3)`
Discussion
8.

How many of the following ethers cannot be prepared by Willismson's synthesis CH_(3)OCH_(2)CH_(3), C_(6)H_(5)OCH_(2)CH_(3),(C_(6)H_(5))_(2)O, (CH_(3))_(3)COCH_(3),(CH_(3))_(3)COCH_(2)CH_(3),(CH_(3))_(3)COC(CH_(3))_(3), (C_(2)H_(5))_(2)O,C_(6)H_(5)CH_(2)OC_(6)H_(5)

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Solution :Williamson's synthesis required that the ALKYL halide should be `1^(@)` and alkoxide ion MAY be `1^(@),2^(@)` or `3^(@)` . Thus, TWO ethers which cannot be prepared by Williamson's synthesis are :
`(C_(6)H_(5))_(2)O, (CH_(3))_(3)COC(CH_(3))_(3)`.
Discussion
9.

How many of the following ethers canot be prepared by Williamson's sythensis? CH_(3)OCH_(2)CH_(3),C_(6)H_(5)OCH_(3),C_(6)H_(5)OCH_(2)CH_(3),(C_(6)H_(5))_(2)O, (CH_(3))_(3)COCH_(3),(CH_(3))_(3)COCH_(2)CH_(3),(CH_(3))_(3)COC(CH_(3))_(3),(C_(2)H_(5))_(2)O,C_(6)H_(5)CH_(2)OC_(6)H_(5).

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Solution :Williamson's synthesis requires that the alkyl halide should be `1^(@)` and alkoxide ion may be `1^(@), 2^(@)` or `3^(@)` THUS, two ethers which cannot be prepared by williamson's synthesis are:
`(C_(6)H_(5))_(2)O,(CH_(3))_(3)COC(CH_(3))_(3)`.
Discussion
10.

How many of the following ethers can not be prepared by Williamson's synthesis ? CH_(3)-O-CH_(2)CH_(3),(C_(2)H_(5))_(2)O,(CH_(3))_(3)C-O-CH_(3),(CH_(3))_(3)C-O-CH_(2)CH_(3),(CH_(3))_(3)C-O-C(CH_(3))_(3), C_(6)H_(5)-O-CH_(3),C_(6)H_(5)-O-CH_(2)CH_(3),(C_(6)H_(5))_(2)O,C_(6)H_(5)CH_(2)-O-C_(6)H_(5)

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ANSWER :2
Discussion
11.

How many of the following ethers CANNOT be prepared by Williamson's synthesis? CH_(3)OCH_(2)CH_(3),C_(6)H_(5)OCH_(3), (C_(6)H_(5))_2O, (CH_(3))_(3)COCH_(3),(C_(2)H_(5))_2O, (CH_(3))_(3)C-O- C(CH_3)_(3)

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ANSWER :2
Discussion
12.

How many of the following compounds would give turbidity with lucas reagent without heating (1) Benzyl alcohol (2) Allyl alcohol (3) Cyclohexanol (4) 20,ethyl -2-proponol (5) Neopentanol (6) Phenol (7) O-cresol (8) Cylopropyl methyl carbionol (9) P-Nitro benzyl alcohol

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ANSWER :4
Discussion
13.

How many of the following does not react with dil HCl, Cu, Ag, Na_(2)CO_(3), NaHCO_(3),Na_(2)HPO_(4), Na_(3)PO_(4), Mg, K, KHO, KH_(2) PO_(3), NH_(3), KCl

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Solution :DIL. HCL DOESNOT react with Cu & AG & KCL
Discussion
14.

How many of the following compounds will liberate NH_(3) on heating? (NH_(4))_(2)SO_(4),(NH_(4))_(2)CO_(3),NH_(4)Cl,NH_(4)NO_(3),(NH_(4))_(2)Cr_(2)O_(7)

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Solution :If ANIONIC part `x` is non-OXIDISING or WEAKLY oxidising then `NH_(3)` will be the PRODUCT.
Discussion
15.

How many of the following compounds splitting energy (Delta) is greater than pairing energy (P) ? (a) Fe(Co)_(5),""(b) [Co(H_(2)O)_(6)]^(3+) (c ) [Mn(NH_(3))_(6)]^(2+),""(d) [Ir(H_(2)O)_(6)]^(3+) (e ) Na_(2)[Fe(CN)_(5)NO],""(f) [Ni(CO)_(4)], (g) [PtCl_(4)]^(2-)""(h) [Co(H_(2)O)_(3)F_(3)]

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Solution :(a),(B), (d),(E ),(F),(g),(H)
Discussion
16.

How many of the following compounds will change blue litmus into red ? (a) Ethanol(b)Ethanoic acid ( c) Ethanal(d)Propanone (e ) Phenol(f) Squaric acid (g) Propyne(h)Picric acid

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SOLUTION :(B),(E ),(F) (H)
Discussion
17.

How many of the following compounds undergo aldol condensation? Methanal, 2-methylpentanal, benzaldehyde, benzophenone, cyclohexanone.

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Solution :Four aldehydes/ketones are: 2-methylpentanal, cyclohexanone, 1-phenylpropanone and PHENYLACETALDEHYDE contain `alpha`-HYDROGENS and HENCE undergo ALDOL condensation.
Discussion
18.

How many of the following compounds have significant involvement of d orbital in p bonding ? H_2PO_2, BCl_3, H_2S_4O_6,XeO_6, XeOF_4, Fe(CO)_5,SF_6, NH_4Cl, ClO_2, NO_2.

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SOLUTION :
Discussion
19.

How many of the following compounds have optical isomers? (i) [Co(en)_(3)Br_(3), (ii) [Co(NH_(3))_(3)Br_(3)] (iii) [Co(en)_(2)Br_(2)]Br, (iv) [Co(en)(NH_(3))_(2) Br_(2)]Br

Answer»

<BR>

Solution :`[Co(NH_(3))_(3)Br_(3)]` shows OPTICAL isomerism.
Discussion
20.

How many of the following compounds have polymeric structure? Boron Nitride, Boric acid, Borazole, Borax, Berylium hydride, Gypsum, Graphite.

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SOLUTION :Boron NITRIDE, BORIC acid, Beryllium hydride, Graphite.
Discussion
21.

How many of the following compounds gives nitrogen on heating NH_(4) Cl, (NH)_2Cr_(2)O_(7),Ba_(3)N_(2),NH_(4)OH,NH_(4)NO_3

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Solution :`{:(NH_4,hArrNH_3+HCl),(NH_(4)OH,hArrNH_3+H_2O):}}` `{:("Only 2- compounds"),("GIVE"NH_3):}`
Discussion
22.

How many of the following compounds contain the functional group ester ?

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ANSWER :5
Discussion
23.

How many of the following compounds decolorise Br_(2) water solution ?

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SOLUTION :N//A
Discussion
24.

How many of the following compounds can be used as an acylating agent ? (i) CH_(3)COCl, (ii) (CH_(3)CO)_(2)O (iii) CH_(3)COOH,(iv) CH_(2)CH_(2)COCl.

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Solution :Stronger the basic NATURE of the leaving group, weaker will be its leavability. In `CH_(3)COOH, OH^(-)` is a strong BASE so it can’t be removed easily to form `CH_3C^(+)O`required for acetylation (ACYLATION).
Discussion
25.

How many of the following compounds are soluble in sodium bicarbonate? Acetyl chloride. acetic anhydride, acetamide, trifluoro- ethanoL benzoic acid, salicylic acid, benzene sulphonic acid, 2 ,4, 6-trinitrophenol

Answer»
Discussion
26.

How many of the following compounds can show Claisen condensation reaction?

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ANSWER :3
Discussion
27.

How many of the following compounds are possible products when chlorine is passed through hypo solution (i) S (ii) HCl (iii) Na_(2)S (iv) Na_(2)SO_(4) (v) Na_(2)S_(4)O_(6) (vi) HClO_(4)

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ANSWER :3(i, II and IV)
Discussion
28.

How many of the following compounds are found to exist? BiF_(5), TlCl_(3), PbO_(2), SnCI_(2), Tl_(2)O_(3), PbI_(4), As_(2)O_(3)

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Solution :`BiF_(5), PbO_(2), SnCi_(2), Tl_(2)O_(3), As_(2)O_(3)`
Discussion
29.

How many of the following compounds are more acedic than phenol.

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ANSWER :6
Discussion
30.

How many of the following complexes are expected to have d^(2)sp^(3) hybridisation ? [Mn(CN)_(6)]^(3-),""[MnCl_+(6)]^(3-), [Fe(CN)_(6)]^(3-),[FeF_(6)]^(3-),""[CoF_(6)]^(3-), [Co(C_(2)O_(4))_(3)]^(3-),""[MnBr_(4)]^(2-)

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Solution :`[Mn(CN)_(6)]^(3-),[FE(CN)_(6)]^(3-),[Co(C_(2)O_(4))_(3)]^(3-)`
Discussion
31.

How many of the following cation belongs to group IIA,III,IV and V only Hg_(2)^(2+),Pb^(2+),Sb^(3+),Mg^(2+),As^(3+),Cu^(2+),Cr^(3+),Cr^(3+),Zn^(2+),Sn^(2+)

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Answer :4
`Pb^(2+),CU^(2+),CR^(3+),Zn^(2+)`
Discussion
32.

How many of the following complexes are correctly matched with given properties ? (a)[Ni(NH_3)_6]^(2+)-Octahedral outer orbital complex and two unpaired electrons. (b)[Cr (NH_3)_6]^(3+)-Octahedral inner orbital complex and one unpaired electron. ( c)[Zn(NH_3)_6]^(2+)-Octahedral outer orbital complex and diamagnetic. (d)[Pt (NH_(3))_4]^(2+)-Square planar and diamagnetic (e)[Co (SCN)_4]^(2-)-Tetrahedral and three unpaired electrons. (f)[NiBr_2(PPh_3)_2]-Square planar and diamagnetic.

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SOLUTION :
All electrons are paired , so complex ion is diamagnetic
(d)`._78 Pt (II)` has `5d^8` configuration , square planar and all electrons are paired , so diamagnetic
(e)`._27Co^(2+)` has `3d^7` configuration, `SCN^-` is weak field ligand So the complex is tetrahedral and paramagnentic with THREE unpaired electrons.
(F)`._25 NI^(2+)` has `3d^5` configuration , tetrahedral and two unpaired electrons.
Discussion
33.

How many of the following clements exclusively occur in combined state? Gold, iron, zinc, aluminium, platinum, sodium, magnesium

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ANSWER :5
Discussion
34.

How many of the following cations belongs to group IIA in qualitative salt analysis Sn^(2+), Hg_(2)^(+2), Pb^(+2), Zn^(2+), Cu^(+2), Cr^(+3), As^(+3), Mg^(+2), Sb^(+3)

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SOLUTION :`PB^(+2), CU^(+2)`
Discussion
35.

How many of the following carbonyl compound will give two products after reaction with NH_(2)OH :

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Answer :7 (I, II, iii, IV, V, VIII, IX)
Discussion
36.

How many of the following carbons belongs to IIA, III, IV and V only in qualitative salt analysis Hg_(2)^(2+), As^(+3), Zn^(+2), Mg^(+2), NH_(4)^(+), Sr^(+2), Pb^(+2), Ni^(+2)

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Solution :`As^(+3), Zn^(+2), NI^(+2), SR^(+2), PB^(+2)`
Discussion
37.

How many of the following carbides on reaction with water will produce a product capable of forming silver mirror, on treatment with Tollen's reagent? Be_(2)C, CaC_(2), Mg_(2)C_(3), Al_(4)C_(3), CH_(4), SiC

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SOLUTION :cetylene gives TOLLEN's TEST but not form silver mirror `(Ag).(Ag_(2)C_(2)`-white ppt.)
Discussion
38.

How many of the following cannot displace H_(2) from dil.HCl? Cu,Zn,Ni,Fe,Ag,Au,Pt,Hg,Cd

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SOLUTION :N//A
Discussion
39.

How many of the following cannot displace H_2 from dil. HCl ? Cu,Zn,Ni,Fe,Ag,Au,Pt,Hg,Cd

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Solution :Cu,HG,PT,Ag,Au cannot DISPLACES `H_2` gas from dil HCl
Discussion
40.

How many of the following can show geometrical isomerism VI. CHCl=C=CHCl VII. pH-N=N-Ph VIII. MeCH=N-NH_(2)

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ANSWER :12
Discussion
41.

How many of the following can not show tautomerism? Acetophenone, Acetadehyde, Benzaldehyde, Propanal, Benzophenone, Butan-2-one, Ethylacetoacetate, p-Benzoquinone, Acetophenone.

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ANSWER :4
Discussion
42.

How many of the following can give yellow ppt. with I_(2)//OH^(-)?

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Solution :acetophenone, resorcinol, will GIVE IODOFORM TEST
Discussion
43.

How many of the following are water soluble ? Agf,AgCl,AgB,Agl,CaF_2,CaCl_2,CaBr_2,Cal_2

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SOLUTION :`AGF,CaCl_2 . CaBr_2. CaI_2` are WATER SOLUBLE
Discussion
44.

How many of the following are thermosetting polymers polyester, SBR, bakelite,polyvinyl acetate, urea-formaldehyde resin, melamine-formaldehyde resin, nylon 6, 6, polypropylene, Thiokol

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SOLUTION :BAKELITE , urea-formaldehyde RESIN and melamine-formaldehyde resin are THERMOSETTING PLASTICS.
Discussion
45.

How many of the following are thermosetting polymers ?

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SOLUTION :THREE . BAKELITE , urea - FORMALDEHYDE resin and melamine - formaldehyde resin are THERMOSETTING plastics.
Discussion
46.

How many of the following are square palanar? (a) Ni(dmg)_(2)""(b) [Ni(CN)_(4)]^(2-) (c ) [Ni(CN)_(4)]^(4-)""(d) [Ni(CO)_(4)] (e ) [Ni(Cl)_(4)]^(2-)""(f) K_(2)Cr_(2)O_(7) (g) K_(2)CrO_(4)""(h) KMnO_(4) (i) K_(2)MnO_(4)""(j) CrO_(2)Cl_(2)

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SOLUTION :(a),(B) are SQUARE PLANAR.
Discussion
47.

How many of the following are tertiary amines ?

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ANSWER :3
Discussion
48.

How many of the following are synthetic rubbers ? Buna-S, polystyrene, Buna-N, isoprene, neoprene, thiokol, PVC, terylene.

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ANSWER :4
Discussion
49.

How many of the following are state function: (i) Internal energy (ii) Heat (iii) Enthalpy (iv) Entropy (v) Pressure (vi) Temp. (vii) volume (viii) work (ix) specific heat capacity (x) molar heat capacity

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SOLUTION :N//A
Discussion
50.

How many of the following are sp^(3) hybridized? [ZnCl_(4)]^(2-),Ni(DMG)_(2),[Ni(CN)_(4)]^(2-),[Ni(CO)_(4)] [NiCl_(4)]^(2-),[PtCl_(4)]^(2-),[Pd(NH_(3))_(4)]^(2+),[FeCl_(4)]^(-1)

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SOLUTION :`[ZnCl_(4)]^(2-) , NI(CO)_(4), [NiCl_(4)]^(2-) , [FeCl_(4)]^(-1)` are tetrahedral and `sp^(3)` HYBRIDIZED .
Discussion