94420 + Interview Questions in Chemistry in Class 12

1.	Find the [OH^-] in 100 mL of 0.015 M HCl (aq.) solution.
Answer» `5xx10^(-12)` M `3XX10^(-10)` M `6.7xx10^(-13)` M `2XX10^(-9)` M Answer :C

Discussion

2.	Find the odd one out . SO_2 , NH_3 , NaCl ,Silica gel
Answer» SOLUTION :Silica GEL. It is an adsorbent WHEREAS others are ADSORBATES.

Discussion

3.	Find the odd one out . Smoke, Froth, Fumes, Dust, Air pollutants.
Answer» Solution :FROTH. It is a foam WHEREAS others are solid AEROSOL.

Discussion

4.	Find the odd one out . Pt , Ni , Fe^(@)//Pd^(@), Fe/Mo, Sn/HCl
Answer» SOLUTION :`FE^(@)//PD^(@)`.It is a nano CATALYST where as others ordinary catalyst.

Discussion

5.	Find the odd one out . Silica gel ,Pt , Ag , Pd , NH_3
Answer» SOLUTION :`NH_3`.It is an ADSORBATE WHEREAS OTHERS are ADSORBENTS.

Discussion

6.	Find the odd one out . Pumice stone, Foam, Milk, Rubber band.
Answer» Solution :Milk. It is an EMULSION WHEREAS others are SOLID FOAM.

Discussion

7.	Find the odd one out . Pt , Glycerol , MnO_2 , Ni , I_2
Answer» SOLUTION :GLYCEROL. It is a NEGATIVE CATALYST whereas OTHERS are positive catalyst.

Discussion

8.	Find the odd one out . Pepsin, Zymase, Maltase, Diastase, Maltose, Urease.
Answer» SOLUTION :Maltose. It is a CARBOHYDRATE WHEREAS others are ENZYME catalysts.

Discussion

9.	Find the odd one out . Pearls, Opals, Coloured glass, Alloys, Pumice stone.
Answer» Solution : Pumice STONE. It is a SOLID foam WHEREAS others are solid SOL.

Discussion

10.	Find the odd one out . Oxidation, Peptisation, Reduction, Decomposition, Hydrolysis.
Answer» Solution : Peptisation. It is a dispersion method of PREPARATION of COLLOID WHEREAS OTHERS are condensation methods of preparation of colloids.

Discussion

11.	Find the odd one out . Milk, coffee, smoke, common salt solution, dust.
Answer» Solution : Common SALT solution. It is a true solution whereas OTHERS are COLLOIDS.

Discussion

12.	Find the odd one out . Mechanical dispersion, Bredig's arc method, Peptisation, Double decomposition, Ultrasonic dispersion.
Answer» Solution : Double DECOMPOSITION. It is a CONDENSATION method of PREPARATION of colloids whereas others are DISPERSION methods of preparation of colloids.

Discussion

13.	Find the odd one out . Mica, Nickel, Charcoal, Tungsten, Ethyl alcohol vapours
Answer» Solution : Ethyl ALCOHOL vapours. It is an ADSORBATE WHEREAS OTHERS are adsorbents.

Discussion

14.	Find the odd one out . HeNe , O_2, N_2 , Pt
Answer» SOLUTION :PT. It is ADSORBENT and all OTHERS are ADSORBATES.

Discussion

15.	Find the odd one out . Ink, Milk, Cream, Mayonnaise.
Answer» SOLUTION :INK. It is a SOL whereas others are Emulsion.

Discussion

16.	Find the odd one out give the reasons Pyridoxine, Dopamine, Histamine, Aspirin.
Answer» Solution :ASPIRIN: It is acid derivative and USED as MEDICINE whereas other are ORGANIC nitrogen compounds used in medicine.

Discussion

17.	Find the odd one out give the reasonsPropan-2-amin, N-ethyl -N-methyl, propan-2-amine, N,N-dimethyl methanamine, N,N-diethyl butan-1-amine.
Answer» SOLUTION :PROPAN -2- amine: It is a secondary amine whereas others are tertiary amiens.

Discussion

18.	Find the odd one out give the reasonsP-hydroxy azo benzene, Hydrzzo benzene, P-amino azo benzerne, 2-Phenyl azo methyl phenol
Answer» SOLUTION :Hydrazo BENZENE: It is not a DYE whereas OTHERS are dyes.

Discussion

19.	Find the odd one out give the reasonsN-methyl methanamine, N-methyl ethanamine, N-phenyl benzamide, N,N-demethyl methanamine.
Answer» Solution :N,N-dimethyl methanamine: It is an EXAMPLE of tertiary amine WHEREAS others are SECONDARY amine.

Discussion

20.	Find the odd one out give the reasonsGrinitro glycerine, Glyceryl triacetate, Trinitro benzene, Trinitro toluene.
Answer» Solution :GLYCERYL triacetate: It is an ESTER of glycerol whereas others are ORGANIC nitrogen compunds USED in making explosives.

Discussion

21.	Find the odd one out give the reasonsMethyl iso cyanide, Methyl cyanide, Acetic anhydrie, Ethyl amine Nitro ethane
Answer» SOLUTION :ACETIC anhydride: It is an ACID DERIVATIVE whereas OTHERS are organic nitrogen compunds.

Discussion

22.	Find the odd one out . Friedel crafts reaction, Haber's process, Hydrolysis of cane sugar, Contact process.
Answer» SOLUTION : Hydrolysis of CANE SUGAR. It is HOMOGENEOUS catalysis whereas others are heterogeneous catalysis.

Discussion

23.	Find the odd one out . Dialysis, electrophoresis, Ultrafilteration, Electrodialysis.
Answer» Solution : ELECTROPHORESIS is an electrical property of COLLOIDS but others are PURIFICATION methods of colloids.

Discussion

24.	Find the odd one out . Coconut charcoal, silica gel, mica, SO_(2),Animal charcoal
Answer» SOLUTION :`SO_2` . It is an ADSORBATE WHEREAS OTHERS are ADSORBENTS.

Discussion

25.	Find the odd one out . Fe , Anhydrous AlCl_3 , V_2O_5, Pt , Ethyl alcohol
Answer» SOLUTION : Ethyl alcohol is a negative catalyst WHEREAS OTHERS are positive catalyst.

Discussion

26.	Find the odd one out . Decomposion of acetaldehydeby I_2 , Decomposition of H_2O_2 by Pt , Esterhydrolysis with acid , Hydrolysisof cane sugar .
Answer» SOLUTION :Decomposition of `H_(2) O_(2)`by PT. It is HETEROGENEOUS CATALYSIS whereas others are homogeneous catalysis.

Discussion

27.	Find the odd one out and givethe reason.
Answer» Potash ALUM sodium alum burnt alum Ammonium alum Solution :Reason Burnt alum does not having WATER MOLECULE.

Discussion

28.	Find the odd one out and given the reason.
Answer» Al B O NA Solution :REASON: Na is s-block ELEMENT but other are p-block ELEMENTS.

Discussion

29.	Find the odd one out and give the reasons (a)Silver (b)Gold (c )Sodium (d)Platinum
Answer» Solution :(c )Sodium REASON:Sodium is more REACTIVE ELEMENT than Ag.Au and PT.

Discussion

30.	Find the odd one out and give the reasons (a)Nickel (b)Silicon (c )Germanium (d)Galium
Answer» SOLUTION :(a)Nickel REASON:Si,Ge and Ga are purified by ZONE REFINING while Ni is not

Discussion

31.	Find the odd one out and give the reasons (a)DeltaG=-Ve (b)DeltaH=-Ve (c )DeltaS=+Ve (d)DeltaS=-Ve
Answer» SOLUTION :(d)`DelataS=-Ve` RESON `DeltaG=-ve`,`DeltaH=-Ve`,`DeltaS=+ve` are the CONDITIONS for SPONTANEOUS PROCESS.

Discussion

32.	Find the odd one out and give the reasons (a)Haematite (b)Siderite (c )Limonite(d)Azurite
Answer» SOLUTION :(a)Azurite REASON:Azurite is ORE of COPPER but other are ore of iron.

Discussion

33.	Find the odd one out and give the reasons (a)Copper glance (b)Zinc blende (c )Argentite (d)Magnetite
Answer» SOLUTION :(d)Magnetire Reason:Magnetire is oxide ORE but others are SULPHIDE ORES.

Discussion

34.	Find the odd one out and give the reasons (a)Copper (b)Zinc (c )Silver (d)Galium
Answer» Solution :(d)GALIUM REASON:Cu,Zn and AG are purified by electrolytic refinig while Ga is not

Discussion

35.	Find the odd one out and give the reasons.
Answer» METHANAL ETHANAL PHENYL methanal Prop-2-enal Solution :It is an AROMATIC aldehyde where as others are aliphatic ALDEHYDES.

Discussion

36.	Find the odd one out and give the reasons :
Answer» `I alpha V` `I = V/R` `V = IR` `R = I/V` SOLUTION :`R = I?V` is the ODD one, and other three REPRESENTS Ohm.s law .

Discussion

37.	Find the Odd one out and give the reason.
Answer» Icosagens Tetragens ALKALI METALS Chalcogens Solution :Alkali metals. REASON : Alkali metals are s - block elements but other are p - block elements.

Discussion

38.	Find the odd one out and give and reasons.
Answer» `NH_3` `H_2O` `RNH_2` `BF_3` SOLUTION :`BF_3` is the lewis acid WHEREAS others are lewis BASE.

Discussion

39.	Find the odd one out
Answer» NITROUS ACID Nitric acid Hyponitrous acid Pernitrous acid Solution :Pernitrous acid CONTAINS peroxide linkage OTHERS doesn.t have peroxide linkage.

Discussion

40.	Find the number pair of ions which have same outermost E.C. Set I : (Ac^(3+),Th^(4+)), (Th^(3+), Pa^(4+)), Pa^(3+), U^(4+)), (U^(3+), Np^(4+)), (Np^(3+), Pu^(4+)), Pu^(3+), Am^(4+)), (Am^(3+), Cm^(4+)), (Cm^(3+), Bk^(4+)), (Bk^(3+), Cf^(4+)), (Cf^(3+), Es^(4+)), (Es^(3+), Fm^(4+)), (Fm^(3+), Md^(4+)), (Md^(3+), No^(4+)), (No^(3+), Lr^(4+)) Set II : (La^(2+), Ce^(3+)), (Ce^(2+), Pr^(3+)), (Pr^(2+), Nd^(3+)), (Nd^(2+), Pm^(3+)), (Pm^(2+), Sm^(3+)), (Sm^(2+), Eu^(3+)), (Eu^(2+), Gd^(3+)), (Gd^(2+), Tb^(3+)), (Tb^(2+), Dy^(3+)), (Dy^(2+), (Ho^(3+)), (Er^(2+), Tm^(3+)), (Tn^(2+), Yb^(3+)), (Yb^(2+), (Lu^(3+)) If the value of set I is 'x' and set II is 'y', then find \|x-y\|.
Answer» Solution :`[[LA^(2+) rarr 5d^(1)],[Ce^(3+) rarr 4F^(1)]],[[Gd^(2+) rarr 4f^(7)5d^(1)],[Th^(3+) rarr 4f^(8)]]` EXPECT these TWO pairs, all other pairs have same outermost E.C.

Discussion

41.	Find the Odd net out.
Answer» Vitamin-B_(12)` Haemoglobin Chlorophy `II` GLYCINE Solution :Glycine is an AMINO acid WHEREAS

Discussion

42.	Find the number of unpaired electrons in each case [Mn(CN)_(6)]^(3-)=x""[FeF_(6)]^(3-)=t [MnCl_(6)]^(3-)=y""[CoF_(6)]^(3-)=u [Fe(CN)_(6)]^(3-)=z""[Co(H_(2)O)_(3)F_(3)]=v Hence, find the correct relationship between x, y, z, t, u, v
Answer» `y-U=V` `y^(2)+(x+z)^(2)=t^(2)+v^(2)` `x^(2)+ z-t=y^(2)-u^(2)+v^(2)` `x+y+z+t+u GT u^(2)` SOLUTION :x=2, y=4,z=1,t=5,u=4,v=0.

Discussion

43.	Find the number of unpaired electrons in e_(g) orbital of Fe in K_(4)[Fe(CN)_(6)]
Answer» SOLUTION :`FE^(+2)=t_(2g)^(6)e_(g)^(0)`

Discussion

44.	Find the number of unpaired electrons in Pentaaquanitrosyliumiron(I) sulphate.
Answer» SOLUTION :In `[Fe(H_(2)O)_(5)NO]SO_(4)`, Fe is in +1 oxidation STATE and having `t_(2g)^(5)e_(g)^(2)` configuration.

Discussion

45.	Find the number of structure isomers of fully saturated cycloalkane of molecular formulae C_(6)H_(12) which give the monochloro structural products.
Answer» SOLUTION :N//A

Discussion

46.	Find the number of species which have least tendency to dimerize. NO_(2),NO,ClO_(2),ClO_(3),OF,O_(2)^(-)
Answer»

Discussion

47.	Find the number of species having C-O bond length grater than that in free CO molecule. Fe(CO)_(5), (CO_(3)^(2-), CO_(2), Ni(CO)_(4), [Cr(dien)(CO)_(3)], [Co(CO)_(4)]^(-), C_(3)O_(2), H[Mn(CO)_(5)]
Answer» SOLUTION :All have GREATER than FREE CO MOLECULE.

Discussion

48.	Find the number ofreducingagents fromthe following H_(2)S,SO_(3),CrO_(4)^(2-),Fe^(2+),MnO_(4)^(Θ)
Answer» SOLUTION :`H_(2)S,FE^(2-)`

Discussion

49.	Find the number of reagents which would lead to unsymmetrical cleavage of diborane. CH_(3)NH_(2),NH_(3),(CH_(3))_(2)NH,(CH_(3))_(3)N, , N_(2)H
Answer» SOLUTION :`CH_(3)NH_(2),NH_(3),(CH_(3))_(2)NH`

Discussion

50.	Find the number of molecules which are not having 3e-4c bond from the following Al_(2)(CH_(3))_(6),Si_(2)H_(6),B_(2)H_(6),C_(2)H_(6),Si_(2)Cl_(6),Al_(2)Cl_(6)
Answer»

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Find the [OH^-] in 100 mL of 0.015 M HCl (aq.) solution.

Find the odd one out . SO_2 , NH_3 , NaCl ,Silica gel

Find the odd one out . Smoke, Froth, Fumes, Dust, Air pollutants.

Find the odd one out . Pt , Ni , Fe^(@)//Pd^(@), Fe/Mo, Sn/HCl

Find the odd one out . Silica gel ,Pt , Ag , Pd , NH_3

Find the odd one out . Pumice stone, Foam, Milk, Rubber band.

Find the odd one out . Pt , Glycerol , MnO_2 , Ni , I_2

Find the odd one out . Pepsin, Zymase, Maltase, Diastase, Maltose, Urease.

Find the odd one out . Pearls, Opals, Coloured glass, Alloys, Pumice stone.

Find the odd one out . Oxidation, Peptisation, Reduction, Decomposition, Hydrolysis.

Find the odd one out . Milk, coffee, smoke, common salt solution, dust.

Find the odd one out . Mechanical dispersion, Bredig's arc method, Peptisation, Double decomposition, Ultrasonic dispersion.

Find the odd one out . Mica, Nickel, Charcoal, Tungsten, Ethyl alcohol vapours

Find the odd one out . HeNe , O_2, N_2 , Pt

Find the odd one out . Ink, Milk, Cream, Mayonnaise.

Find the odd one out give the reasons Pyridoxine, Dopamine, Histamine, Aspirin.

Find the odd one out give the reasonsPropan-2-amin, N-ethyl -N-methyl, propan-2-amine, N,N-dimethyl methanamine, N,N-diethyl butan-1-amine.

Find the odd one out give the reasonsP-hydroxy azo benzene, Hydrzzo benzene, P-amino azo benzerne, 2-Phenyl azo methyl phenol

Find the odd one out give the reasonsN-methyl methanamine, N-methyl ethanamine, N-phenyl benzamide, N,N-demethyl methanamine.

Find the odd one out give the reasonsGrinitro glycerine, Glyceryl triacetate, Trinitro benzene, Trinitro toluene.

Find the odd one out give the reasonsMethyl iso cyanide, Methyl cyanide, Acetic anhydrie, Ethyl amine Nitro ethane

Find the odd one out . Friedel crafts reaction, Haber's process, Hydrolysis of cane sugar, Contact process.

Find the odd one out . Dialysis, electrophoresis, Ultrafilteration, Electrodialysis.

Find the odd one out . Coconut charcoal, silica gel, mica, SO_(2),Animal charcoal

Find the odd one out . Fe , Anhydrous AlCl_3 , V_2O_5, Pt , Ethyl alcohol

Find the odd one out . Decomposion of acetaldehydeby I_2 , Decomposition of H_2O_2 by Pt , Esterhydrolysis with acid , Hydrolysisof cane sugar .

Find the odd one out and givethe reason.

Find the odd one out and given the reason.

Find the odd one out and give the reasons (a)Silver (b)Gold (c )Sodium (d)Platinum

Find the odd one out and give the reasons (a)Nickel (b)Silicon (c )Germanium (d)Galium

Find the odd one out and give the reasons (a)DeltaG=-Ve (b)DeltaH=-Ve (c )DeltaS=+Ve (d)DeltaS=-Ve

Find the odd one out and give the reasons (a)Haematite (b)Siderite (c )Limonite(d)Azurite

Find the odd one out and give the reasons (a)Copper glance (b)Zinc blende (c )Argentite (d)Magnetite

Find the odd one out and give the reasons (a)Copper (b)Zinc (c )Silver (d)Galium

Find the odd one out and give the reasons.

Find the odd one out and give the reasons :

Find the Odd one out and give the reason.

Find the odd one out and give and reasons.

Find the odd one out

Find the Odd net out.

Find the number of unpaired electrons in each case [Mn(CN)_(6)]^(3-)=x""[FeF_(6)]^(3-)=t [MnCl_(6)]^(3-)=y""[CoF_(6)]^(3-)=u [Fe(CN)_(6)]^(3-)=z""[Co(H_(2)O)_(3)F_(3)]=v Hence, find the correct relationship between x, y, z, t, u, v

Find the number of unpaired electrons in e_(g) orbital of Fe in K_(4)[Fe(CN)_(6)]

Find the number of unpaired electrons in Pentaaquanitrosyliumiron(I) sulphate.

Find the number of structure isomers of fully saturated cycloalkane of molecular formulae C_(6)H_(12) which give the monochloro structural products.

Find the number of species which have least tendency to dimerize. NO_(2),NO,ClO_(2),ClO_(3),OF,O_(2)^(-)

Find the number of species having C-O bond length grater than that in free CO molecule. Fe(CO)_(5), (CO_(3)^(2-), CO_(2), Ni(CO)_(4), [Cr(dien)(CO)_(3)], [Co(CO)_(4)]^(-), C_(3)O_(2), H[Mn(CO)_(5)]

Find the number ofreducingagents fromthe following H_(2)S,SO_(3),CrO_(4)^(2-),Fe^(2+),MnO_(4)^(Θ)

Find the number of reagents which would lead to unsymmetrical cleavage of diborane. CH_(3)NH_(2),NH_(3),(CH_(3))_(2)NH,(CH_(3))_(3)N, , N_(2)H

Find the number of molecules which are not having 3e-4c bond from the following Al_(2)(CH_(3))_(6),Si_(2)H_(6),B_(2)H_(6),C_(2)H_(6),Si_(2)Cl_(6),Al_(2)Cl_(6)