94420 + Interview Questions in Chemistry in Class 12

1.	CO_((g))+H_(2(g))overset([X])rarrHCHO_((g)) In above reaction, what is [X] ? (A)
Answer» `NI//CrO_(3)` `CU` `Ni` `Cu//ZnO` SOLUTION :`Cu`

Discussion

2.	Clemmensen reduction of a ketone is carried out in presence of -
Answer» `H_2` with PD as catalyst Glycol with KOH `LiAIH_4` in ether ZN -Hg with HCl Answer :B

Discussion

3.	Cleasing action of cationic detergent is due to
Answer» HYDROPHOBIC PART of cation hydrophillic part of cation hydrophobic part of anion hydrophilic part of anion Answer :B

Discussion

4.	CO(g)+H_(2)(g)overset(Cu)toX CO(g)+H_(2)(g)overset(Cu//ZnO-Cr_(2)O_(3))toY CO(g)+H_(2)(g)overset(Ni)toZ X,Y and Z respectively are
Answer» `CH_(3) OH, HCHO, CH_(4)` `HCHO, CH_(3)OH, CH_(4)` `CH_(4), CH_(3)OH,k CH_(4)` `CHOH, CH_(4),CH_(3)OH` Solution :X, Y and Z will be HCHO, `CH_(3)OH and CH_(4)` respectively.

Discussion

5.	Clay is an example of
Answer» THREE DIMENSIONAL SILICATES Chain silicates Cyclic silicates Sheet silicates ANSWER :D

Discussion

6.	CO_((g))+2H_(2(g))overset(?)rarrCH_(3)OH_((g))
Answer» `NI` `CU//ZNO-Cr_(2)O_(3)` `Cu` `ZnO` SOLUTION :`Cu//ZnO-Cr_(2)O_(3)`

Discussion

7.	Claus obtained ........... by subjecting ............ to high frequency ultrasonic vibrations.
Answer» SOLUTION :MERCURY SOL , mercury

Discussion

8.	Claude process is used in the manufacture of:
Answer» `N_2` `NH_3` `N_2O` `NO_2` ANSWER :A

Discussion

9.	[CoF_(6)]^(3-) is
Answer» paramagnetic and under `SP^(3)d^(2)` hybridisation diamagnetic and UNDERGOES `d^(2)sp^(3)` hybridisation paragamagnetic and undergoes `sp^(3)d` hybridisation diamagnetic and undergoes `sp^(3)` hybridisation. Solution :`[CoF_(6)]^(3-)` is parasmagnetic `[CoF_(6)]^(3-):CO^(3+)(3D^(6))`

Discussion

10.	Classify the following species into Lewis acids and Lewis bases and show how these can act a Lewis acid/ Lewis base? OH^- ions (ii)F^- (iii)H^+ (iv) BCl_3
Answer» Solution :`OH^-` IONS can DONATE an electron pair and act as Lewis base. (II) `F^-` ions can donate an electron pair and act as Lewis base. (iii) `H^+` ions can accept an electron pair and act as Lewis base. (iv) `BCl_3` can accept in electron pair since Boron atom is electron DEFICIENT. It is a lewis acid.

Discussion

11.	[CoF_(6)]^(3-) forms outer orbital complexes while (Co(CN)_(6)]^(3-)forms inner orbital complexes. Why
Answer» Solution :In`[CoF_(6)^(3-)` FIONS provide a weak LIGAND field and therefore unpaired electrons of cobalt do not get PAIRED. As a result, the orbitals of outer shell are used in hybridization `(sp^(3)d^(2)`. On the contrary, in `[CO(CN)_(6)]^(3+)` the strong ligand field of `CN^(-)` forces the PAIRING of electrons, in inner shell VACATING the inner d-orbitals for hybridization `(d^(2)sp^(3))`

Discussion

12.	Classify the following solids on the basis of bonding considerations : CO_(2), MgO, Al, H_(2), Si, Gd, Pb, AgCl.
Answer» Solution :The SOLIDS are arranged against the type of bonding as under : `{:("Molecular solids", - ,CO_(2) H_(2)),("Iconic solids ",- , MgO AgCI),("Covalent solids ",-,Si),("Metalliac solids",- ,"Gd Al Pb."):}`

Discussion

13.	COF_2gas passed over a catalyst at 1000^@Ccomes to equilibrium:2 COF_2(g)iffCO_2(g) + CF_4(g)Analysis of the equilibrium mixture (after quick cooling to freeze the equilibrium) shows that 500 mL of equilibrium mixture (NTP) contains 300 mL (NTP) of COF_2 and CO_2 . Taking the total pressure to be 10 atm, calculate K_p .
Answer» SOLUTION :At eqb:`UNDERSET(100ML)(2COF_2) IFF underset(200ML)(CO_2) + underset(200mL)(CF_4)` 4.0

Discussion

14.	[Co(en)_(3)]^(3+) ion is expected to show :
Answer» TWO optically ACTIVE isomers : d and l forms d, l and meso forms four optically active isomers : CIS, d and l isomers and TRANS d and l isomers None of these ANSWER :A

Discussion

15.	Classify the following solids into different types (a) Ammonium phosphate (b) Brass (c) S_(8) molecule (d) Diamond
Answer» SOLUTION :

Discussion

16.	Classify the following solids into isotropic and anisotropic. Polyvinylchloride, Rubber, Glucose, Glass
Answer» SOLUTION :ANISOTROPIC - GLUCOSE Istropic-Glass,RUBBER,POLYVINYLCHLORIDE

Discussion

17.	Classify the following solids in different categories based on the nature of intermolecular forces operating in them : Potassium sulphate, tin, benzene, urea, ammonia, water, zinc sulphide, graphite, rubidium, argon, silicon carbide.
Answer» SOLUTION : METALLIC solids : TIN, Rubidium Ionic solids : Potassium sulphate, Zinc sulphide. Covalent solids : Graphite, Silicon carbide Molecular solids : BENZENE, Urea, Ammonia, Water, Argon.

Discussion

18.	[Co(en)_2(NH_3)_2]Cl_3 can exhibit (A) ionisation isomerism (B) geometrical isomerism (C) optical isomerism
Answer» A,B B,C A,C A,B,C Answer :B

Discussion

19.	Classify the following solids in different categories based on the nature of intermolecular forces operating in them : Potassium sulphate, tin, benzene, urea, ammonia, water, zinc sulphide, graphite, rubidium, argon, silicon carbide. Solid Category Potassium sulphate Ionic
Answer» Solution :`{:("Solid","Category"),("Potassium sulphate","Ionic"),("Tin","Metallic"),("Benzene","MOLECULAR"),("Urea","Molecular"),("Ammonia","Molecular with H-bonds"),("Water","Molecular with H-bonds"):}{:("Solid","Category"),("ZINC sulphide","Ionic"),("Graphite","Covalent"),("Rubidium","Metallic"),("ARGON","Molecular"),("Silicon carbide","Covalent"):}`

Discussion

20.	[Co(en)_(2)Cl_(2)]Br react with silver nitrate to form.............coloured precipitate.
Answer» ANSWER :PALE YELLOW

Discussion

21.	Classify the following solids in different categories based on the nature of intermolecular forces operating in them : Potassium sulphate, tin, benzene, urea, ammonia, water, zinc sulphide, graphite, rubidium, argon, silicon carbide.
Answer» Solution :`{:("Potassium sulphate","Ionic"),("Tin","Metallic"),("Benzene","Molecular (non polar)"),("Urea","Molecular (polar)"),("Ammonia","Molecular (hydrogen bonded)"),("WATER","Molecular (hydrogen bonded)"),("Zinc sulphide","Ionic"),("Graphite","Covalent or NETWORK"),("RUBIDIUM","Metallic"),("ARGON","Molecular (non polar)"),("SILICON carbide","Covalent or Network"):}`

Discussion

22.	Coductivity of an electrolytic solution depends on____
Answer» NATURE of electrolyte Concentration of electrolyte Power of AC source Distance between the electrodes Answer :A::B

Discussion

23.	Classify the following solids based on the nature of intermolecular forces operating in them: potassiumsulphate, tin, benzene, urea, ammonia, water, zinc sulphide, graphite, rubidium, argon, silicon carbide.
Answer» Solution :Molecular SOLIDS: BENZENE, urea, AMMONIA, water, argon ionic solids : potassium sulphate, zinc suphide metallic solids : tin, RUBIDIUM covalent solids : graphite, silicon carbide

Discussion

24.	Classify the following solids (a) P_(4) (b) Brass (c ) Diamond (d) NaCl (e ) Iodine
Answer» Solution :(a) `P_(4)` - Molecular solid (B) Brass - Metallic solid (C ) Diamond - Covalent solid (d) NACL - IONIC solid (e ) Iodine - Molecular solid

Discussion

25.	[Co(e n)_(3)]^(3+) ion is expected to show :-
Answer» Two OPTICALLY active isomers Two optically inactive isomers four optically active isomers, CIS, d & `L` from and trans d & `l` form None Answer :A

Discussion

26.	Codon is present in
Answer» t- RNA m- RNA r- RNA All of these Solution :CODON is PRESENT in m-RNA , which is RESPONSIBLE for TRANSLATION.

Discussion

27.	Classify the following solids (a) P_(4), (b) Brass (c) Diamond (d) NaCI (e) lodine
Answer» SOLUTION :`{:("(a) P4 - MOLECULAR SOLID"),("(b) Brass - Metallic solid"),("(C) Diamond - Covalent solid"),("(d) NaCl - Ionic solid"),("(E) Iodine - Molecular solid"):}`

Discussion

28.	COD stands for
Answer» ChemicalOxygendemand . Controlledoxygendemand cloudscausing ozone depletion CHLORINATED OXYGEN DEMAND ANSWER :A

Discussion

29.	Classify the following reactions as homegeneous and heterogeneous catalysis : (a) Vegetable oil (l)+H_(2)(g)overset (Ni(s))rarrVegetable ghee (s) (b) C_(12)H_(22)O_(11)(aq)+H_(2)O(l) overset (H_(2)SO_(4)(aq))rarr C_(6) H_(12)O_(6)(aq)+C_(6)H_(12)O_(6)(aq)
Answer» SOLUTION :(a) : HETEROGENEOUS CATALYSIS (B): HOMOGENEOUS catalysis

Discussion

30.	Cod liver oil is-
Answer» FAT DISPERSED in water Water dispersed in fat Water dispersed in oil Fat dispersed in fat Answer :C

Discussion

31.	Classify the following reaction in one of the reacation type studied in this unit. (1) CH_(3)CH_(2)Br+HS^(-)rarrCH_(3)CH_(2)SH+Br^(-) (2) (CH_(3))_(2)C=CH_(2)+HCIrarr(CH_(3))_(2)C CI-CH_(3) (3) CH_(3)CH_(2)Br+HO^(-)rarrCH_(2)=CH_(2)+H_(2)O+Br^(-) (4) (CH_(3))_(3)C-CH_(2)OH+HBrrarr(CH_(3))_(2)CBrCH_(2)CH_(2)CH_(3)+H_(2)O
Answer» Solution :(1) Nucleophilic substitution (2) ELECTROPHILIC ADDITION (3) `BETA` - ELIMINATION (4) Nucleophilic substitution & rearrangement

Discussion

32.	Classify the following ligand based on the number of donor atoms. (a) NH_(3) (b) en (c )"ox"^(2-) (d) triaminotriethylamine (e) pyridine
Answer» Solution :`(a) NH_(3)`- Monodentate LIGANDS (`N`-Donor ATOM) `(B) en`- Bidentate ligand (`2N`-Donor atom) `(c ) OX^(2-)`- Bidentate ligand (`2O`- Donor atom ) `(d)` triaminotriethylamine- Tridentate ligand (`3N`-Donor atom) `(e )` pyridine- Monodentate ligand (`N`- Donor atom)

Discussion

33.	Classify the following ligands into monodentate and polydentate : (a) Ammonia (b ) Carbon monoxide(c ) Ethylene diamine (d ) Ethylene diamine tetra 0 acetate ion
Answer» Solution :Monodentate LIGANDS are : AMMONIA Carbon MONOXIDE Polydenatate ligands are : ETHYLENE diamine Ethylene diamine tetra - acetate ION.

Discussion

34.	Fats on alkaline hydrolysis, give
Answer» Glycol Alcohol Glycerol Ethylene oxide Solution :Coconut OIL + ALKALI `to` Soap `to` + Glycerol It is a SAPONIFICATION REACTION.

Discussion

35.	Classifythe following intomonosacharides ,oligosaccharides and polysaccharides . (i)Strach(ii) fructose(iii) surcose (iv) lactose(v) maltose .
Answer» Solution :(i) Starch -Polysaccharides . (II) FURCTOSE- Mono saccharides . (iii) SURCOSE- Oligo saccharides . (iv)LACTOSE - Oilgosacchardie (v) MALTOSE - Oligosaccharide . Surcose , Lactose and Maltoseare typicaldisaccharides .

Discussion

36.	Coconut charcoal at 93K in used to separate
Answer» AR and KR NE and Kr He and Kr He and Ne Answer :D

Discussion

37.	Coconut charcoal at-180^0C is used to separate a mixture of:
Answer» AR and Kr Ne and Ar He and Kr He and Ne Answer :B

Discussion

38.	Classify the following into monosaccharides and disaccharides. Ribose, 2-deoxyribose, maltose, galactose, fructose and lactose.
Answer» Solution :MONOSACCHARIDES : Ribose, 2-deoxyribose, galactose and FRUCTOSE. Disaccharides : MALTOSE and Lactose

Discussion

39.	Coconut charcoal at -100^@C adsorbs a mixture of
Answer» He and KR AR, Kr and Xe Kr and Xe He and Ne Solution :In Deewars method. Coconut charcoal at `- 100^@C` . Ar, Kr, Xe are adsorbed.

Discussion

40.	Classify the following into monosaccharides, , oligosaccharides and polysaccharides i) Starch ii) fructose iii) sucrose iv) lactose v) maltose
Answer» Solution :(i) Starch -Polysaccharide (ii) FRUCTOSE - monosaccharide (iii) SUCROSE- oligosaccharides (IV) lactose- oligosaccharides (v) MALTOSE - oligosaccharide

Discussion

41.	Coconut charcoal at-100^0C absorbs in a mixture of:
Answer» He and KR Ar, Kr, and Xe Kr and Xe He and Ne Answer :B

Discussion

42.	Classify the following into monosaccharides and disaccharides : Ribose, 2-deoxyribose, maltose, galactose, fructose and lactose.
Answer» Solution :MONOSACCHARIDES : RIBOSE, 2-deoxyribose, galactose and FRUCTOSE. DISACCHARIDES : Maltose and lactose.

Discussion

43.	COCO_(3((s))hArrCaO_((s))+SO_(2(g)) with of the following expression is correct or For the equlibrium CaCO_(3(s))hArrCaO_((s))+CO_(2(s)) the equlibrium constant is perpesented by the following from
Answer» `K_(p)=(P_(CaO+P_(CO_(2)))//P_(CaCo_(3)))` `K_(p)=P_(CO_(2))` `K_(p)xx(P_(CaO)xxP_(CO_(2))).P_(CaCO_(3))` `(K_(p)[CAP][CO_(2)])/([CaCO_(3)])` Solution :`CaCO_(3(g))hArrCaO_((s))+CO_(2(g))K_(p)=P_(CP_(2))` Solid molecule does not have PARTIAL pressure so in calculation of `K_(p)` only `P_(CO_(2))` is applicable.

Discussion

44.	Classify the following into monosaccharides and disaccharides. Ribose, 2-deoxyribose , maltose, galactose, fructose and lactose.
Answer» SOLUTION :Monosaccharides : RIBOSE , 2-deoxyribose , GALACTOSE and FRUCTOSE. Disaccharides : Maltose and LACTOSE.

Discussion

45.	[Co(CN)_(6)]^(3-) and [CoF_(6)]^(3-) both are octahedral complexes. Then what is the difference between the two ?
Answer» Solution :`[CO(CN)_(6)]^(3-)` is an inner ORBITAL or low spin complex INVOLVING the hybridisation `d^(2)sp^(3)` while `[CoF_(6)]^(3-)` is an outer orbital or high spin complex involving `sp^(3)d^(2)` hybridisation.

Discussion

46.	Classify the following into homopolymer or copolymer Nylon 6, HDPE
Answer» Solution :Nylon 6 and HDPE 9 or HDP) are HOMOPOLYMERS

Discussion

47.	Classify the following into electrophilic and nucleophilic reagents: (a)H^(+)"(b) " Cl^(-)" (d) "NH_(3)"(d)"NO_(2)^(+)"(e)"Cbar(N)"(f)"H_(2)O "(g)"Br^(+)"(h)"ROH"(i)"BF_(3)"(j)"RNH_(2)"(k)"AlCl_(3) "(l)"ROR"(m) Carbocations(n)Carbanions(o) "SO_(3)H "(p)"BeCl_(2)"(q) "I^(-)"(r) "SnCl_(4)"(s)":"CCl"_(2)"(t) ":P(CH_(3))_(3) (u) H_(2)C=CH_(2) (B) Classify the following as Lewis acids and Lewis bases : (a)CH_(3)NH_(2)"(b)"CN^(-)"(c)"AlCl_(3)"(d)"Fe^(3+)"(e) "CO_(2)^(-)
Answer» <P> SOLUTION :Electrophilic reagents: (a), (d), (g), (i), (k), (m), (o), (p), (r), (s) Nucleophilic reagents: (b), (c), (e), (f), (h), (j), (l), (N), (q), (t), (U). 1(B) Lewis ACIDS : (c), (d) Lewis bases : (a), (b), (c)

Discussion

48.	[CoCl(NH_(3))_(4)(H_(2)O)]Br_(2) and [Co(NH_(3))_(4)Br_(2)]Cl.H_(2)O are …. Isomers as well as …… .
Answer» SOLUTION :IONIZATION, HYDRATE

Discussion

49.	Classify the following into cationic and anionic detergents: Sodium dodecylbenzene sulphonate and Cetyltrimethyammonium bromide.
Answer» SOLUTION :SODIUM dodecylbenzene sulphonate - Anionic Cetyltrimethyammonium BROMIDE - Cationic

Discussion

50.	CO,CN^(-), en and NH_(3) are called..........ligands.
Answer» ANSWER :STRONG

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

CO_((g))+H_(2(g))overset([X])rarrHCHO_((g)) In above reaction, what is [X] ? (A)

Clemmensen reduction of a ketone is carried out in presence of -

Cleasing action of cationic detergent is due to

CO(g)+H_(2)(g)overset(Cu)toX CO(g)+H_(2)(g)overset(Cu//ZnO-Cr_(2)O_(3))toY CO(g)+H_(2)(g)overset(Ni)toZ X,Y and Z respectively are

Clay is an example of

CO_((g))+2H_(2(g))overset(?)rarrCH_(3)OH_((g))

Claus obtained ........... by subjecting ............ to high frequency ultrasonic vibrations.

Claude process is used in the manufacture of:

[CoF_(6)]^(3-) is

Classify the following species into Lewis acids and Lewis bases and show how these can act a Lewis acid/ Lewis base? OH^- ions (ii)F^- (iii)H^+ (iv) BCl_3

[CoF_(6)]^(3-) forms outer orbital complexes while (Co(CN)_(6)]^(3-)forms inner orbital complexes. Why

Classify the following solids on the basis of bonding considerations : CO_(2), MgO, Al, H_(2), Si, Gd, Pb, AgCl.

[Co(en)_(3)]^(3+) ion is expected to show :

Classify the following solids into different types (a) Ammonium phosphate (b) Brass (c) S_(8) molecule (d) Diamond

Classify the following solids into isotropic and anisotropic. Polyvinylchloride, Rubber, Glucose, Glass

Classify the following solids in different categories based on the nature of intermolecular forces operating in them : Potassium sulphate, tin, benzene, urea, ammonia, water, zinc sulphide, graphite, rubidium, argon, silicon carbide.

[Co(en)_2(NH_3)_2]Cl_3 can exhibit (A) ionisation isomerism (B) geometrical isomerism (C) optical isomerism

Classify the following solids in different categories based on the nature of intermolecular forces operating in them : Potassium sulphate, tin, benzene, urea, ammonia, water, zinc sulphide, graphite, rubidium, argon, silicon carbide. Solid Category Potassium sulphate Ionic

[Co(en)_(2)Cl_(2)]Br react with silver nitrate to form.............coloured precipitate.

Classify the following solids in different categories based on the nature of intermolecular forces operating in them : Potassium sulphate, tin, benzene, urea, ammonia, water, zinc sulphide, graphite, rubidium, argon, silicon carbide.

Coductivity of an electrolytic solution depends on____

Classify the following solids based on the nature of intermolecular forces operating in them: potassiumsulphate, tin, benzene, urea, ammonia, water, zinc sulphide, graphite, rubidium, argon, silicon carbide.

Classify the following solids (a) P_(4) (b) Brass (c ) Diamond (d) NaCl (e ) Iodine

[Co(e n)_(3)]^(3+) ion is expected to show :-

Codon is present in

Classify the following solids (a) P_(4), (b) Brass (c) Diamond (d) NaCI (e) lodine

COD stands for

Classify the following reactions as homegeneous and heterogeneous catalysis : (a) Vegetable oil (l)+H_(2)(g)overset (Ni(s))rarrVegetable ghee (s) (b) C_(12)H_(22)O_(11)(aq)+H_(2)O(l) overset (H_(2)SO_(4)(aq))rarr C_(6) H_(12)O_(6)(aq)+C_(6)H_(12)O_(6)(aq)

Cod liver oil is-

Classify the following ligand based on the number of donor atoms. (a) NH_(3) (b) en (c )"ox"^(2-) (d) triaminotriethylamine (e) pyridine

Classify the following ligands into monodentate and polydentate : (a) Ammonia (b ) Carbon monoxide(c ) Ethylene diamine (d ) Ethylene diamine tetra 0 acetate ion

Fats on alkaline hydrolysis, give

Classifythe following intomonosacharides ,oligosaccharides and polysaccharides . (i)Strach(ii) fructose(iii) surcose (iv) lactose(v) maltose .

Coconut charcoal at 93K in used to separate

Coconut charcoal at-180^0C is used to separate a mixture of:

Classify the following into monosaccharides and disaccharides. Ribose, 2-deoxyribose, maltose, galactose, fructose and lactose.

Coconut charcoal at -100^@C adsorbs a mixture of

Classify the following into monosaccharides, , oligosaccharides and polysaccharides i) Starch ii) fructose iii) sucrose iv) lactose v) maltose

Coconut charcoal at-100^0C absorbs in a mixture of:

Classify the following into monosaccharides and disaccharides : Ribose, 2-deoxyribose, maltose, galactose, fructose and lactose.

COCO_(3((s))hArrCaO_((s))+SO_(2(g)) with of the following expression is correct or For the equlibrium CaCO_(3(s))hArrCaO_((s))+CO_(2(s)) the equlibrium constant is perpesented by the following from

Classify the following into monosaccharides and disaccharides. Ribose, 2-deoxyribose , maltose, galactose, fructose and lactose.

[Co(CN)_(6)]^(3-) and [CoF_(6)]^(3-) both are octahedral complexes. Then what is the difference between the two ?

Classify the following into homopolymer or copolymer Nylon 6, HDPE

[CoCl(NH_(3))_(4)(H_(2)O)]Br_(2) and [Co(NH_(3))_(4)Br_(2)]Cl.H_(2)O are …. Isomers as well as …… .

Classify the following into cationic and anionic detergents: Sodium dodecylbenzene sulphonate and Cetyltrimethyammonium bromide.

CO,CN^(-), en and NH_(3) are called..........ligands.