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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 11451. |
Which of the following compounds would undergo Cannizzaro's reaction |
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Answer» P ropionaldehyde |
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| 11452. |
The value of B.M in SI units is |
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Answer» `9.273 xx 10^(-23)J.T^(-1)` |
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| 11453. |
Which of the following statements is correct regarding the following reaction ? |
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Answer»
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| 11454. |
What are the products of hydrolysis of lactose ? |
| Answer» SOLUTION :`beta-D-`GALACTOSE and `beta-D-`GLUCOSE. | |
| 11455. |
What is smelting? |
| Answer» Solution :Smelting is a PROCESS of REDUCING the roasted metallic oxide to metal in molten condition .In this process,IMPURITIES are removed by the ADDITION of flux as slag. | |
| 11456. |
What is the general formula of Quinol ? |
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Answer» `C_(6)H_(6)O_(2)` |
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| 11457. |
The standard emfof a galvaniccellinvolvingcellreactionwith n=2 is found to be 0.295 v at 25^(@)cthe equilibrium constantof thereactionwouldbe(Given F= 96500 C "mol"^(-1)m R =8 .314 "jk"^(-1) "mol"^(-1) ) |
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Answer» `2.0 xx10^(11)` At equilibriuim `E_(cell) =0` Given that`R= 8.315 JK^(-1) mol^(-1)` `therefore E_(Cell)^(@) =(0.0591)/(2) log_(10) K` `because` Giventhat `E_(cell)^(@) =0.295 V` `k=1xx10^(10)` |
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| 11458. |
Which of the following reactions do not give 1^(0) amine ? |
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Answer» `Ph-overset(CH_(3))overset(|)CH-OH overset(NaCN,H^(o+))to` |
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| 11459. |
Two substances A and B are present such that [A_(0)]=4[B_(0)] and half-life of A is 5 minutes and that of B is 15 minutes . If they start decaying at the same time following first order kinetics how much time later will the concentration of both of them would be same ? |
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Answer» `15` minutes Amount of B left `n_(2)` half-lives `=((1)/(2))^(n_(2))[B_(0)]` At the END, `([A_(0)])/(2^(n_(1)))=([B_(0)])/(2^(n_(2)))` `implies(4)/(2^(n_(1)))=(1)/(2^(n_(2))){[A_(0)]=4[B_(0)]}` `:.(2^(n_(1)))/(2^(n_(2)))=4implies2^(n_(1)-n_(2))=(2)^(2)` `:.n_(1)-n_(2)=2` `:.n_(2)=(n_(1)-2)` Also, `t=n_(1)xxt_(1//2(B))t=n_(2)xxt_(1//2)(B))` (LET, concentration of both become equal after time `t`) `:.(n_(1)xxt_(1//2(A)))/(n_(2)xxt_(1//2(B)))=1implies(n_(1)xx5)/(n_(2)xx15)=1implies(n_(1))/(n_(2))=3` From Eqs. `(1)` and `(2)`, we get `n_(1)=3`, `n_(2)=1` `t=3xx5=15` minutes |
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| 11460. |
Which of the following tests could be performed to distinguish between 1-butyene ? |
| Answer» Solution :N//A | |
| 11461. |
Which of the following is the correct unit for measuring nuclear radii? |
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Answer» Micron |
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| 11462. |
What may be the stable oxidation state of the transition element with the following d-electron configuration in the ground state of their atoms: 3d^(3), 3d^(5), 3d^(8) and 3d^(4)? |
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Answer» SOLUTION :(i) `3d^(3)`: Stable oxidation STATE will be `(+5)` DUE to outer electronic configuration `3d^(3) 4S^(2) (+2, +3,+4,+5)`. (ii) `3d^(5)`: The outer electronic configuration is `3d^(5) 4s^(2)`, so stable. Oxidation state will be (+2) to (+7) i.e., `(+2), (+3),(+4),(+6),(+7)` (iii) `3d^(8)`: Stable oxidation state will be (+2) as outer electronic configuration is `3d^(8) 4s^(2) ["(+2)", (+3),(+4)]` (iv) `3d^(4)`: There is no `d^(4)` configuration in the ground state. The ground state configuration becomes `3d^(5) 4s^(1)`. The stable oxidation state will be `(+3) and (+6)`. |
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| 11463. |
Write the chemical reaction for the reduction of nitroethane by LiAIH_4 |
| Answer» SOLUTION :`underset("NITROETHANE")(CH_3 CH_2 NO_2) +6 [H] overset(LiAIH_4 //"ether")tounderset("Ethanamine ")(CH_3 CH_2 NH_2+2H_2 O)` | |
| 11465. |
Which of the following halogen oxides is ionic: |
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Answer» `I_4O_9` |
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| 11466. |
Which of the following is used as a preservative to prevent spoilage of food? |
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Answer» SODIUM sulphate |
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| 11467. |
Which of the following alkenes when passed through conc. H_(2)SO_(4) followed by hydrolysis with boiling water would give tert-butyl alcohol |
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Answer» ETHYLENE |
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| 11468. |
Which of the following methods of preparation of amines will not give same number of carbon atoms in the chain of amines as in the reactant? |
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Answer» Reaction of nitrite with `LiAlH_4` Only treatment of amide with `Br_2` in aqueous solution of NaOH wil give an amine with lesser NUMBER of carbon atoms than in the reactant. |
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| 11469. |
The standard e.m.f. for the cell reaction,2Cu^(+)(aq) to Cu(s) + Cu^(2+)(aq) is + 0.36V at 298 K. The equilibrium constant of the reaction is |
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Answer» `5 XX 10^6` |
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| 11470. |
The source of most of the noble gases is: |
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Answer» decay of radioactive minerals |
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| 11471. |
The removal of two atoms or groups one generally hydrogen (H^(+)) and the other a leaving group (L^(-)) resulting in the formation of unsaturated compound is known as elimination reaction. In E_(1) (elimination) reactions the C-L bond is broken heterolytically (in step 1) to form a carbocation (as inS_(N^(1)) reaction) in which (L^(-)) is lost (rate determining step). The carbocation (in step 2) loses a proton from the beta- carbon atom by a base (nucleophile) to form an alkene. E_(1) reaction is favoured in compounds in which the leaving group is at secondar (2^(@)) or tertiary(3^(@)) Position. In E_(2) (elimination) reactions two sigma bonds are broken and a pi-bond is formed simultaneously.E_(2) reactions occur in one step through a transition state. E_(2) reactions are most common in haloalkanes (particulary 1^(@)) and better the leaving group higher is the E_(2) reaction. In E_(2) reactions, both the leaving groups should be antiplaner. E_(1) cb (Elimination unimolecular conjugate base) reaction involves the removal of proton by a conjugate base (step 1) to produce carbanion which loses a leaving group to form an alkene(step 2) and is a slow step 2-Bromopentane is heated with potassium ethoxide in ethanol. The major product obtained is : |
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Answer»
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| 11472. |
To which colloidal system does milk belong? |
| Answer» SOLUTION :EMULSION of FATS DISPERSED in WATER. | |
| 11474. |
Two liquids A and B on mixing produce a warm solution. Which type of deviation from Raoult's law does it show? |
| Answer» Solution :Warming up of the solution MEANS that be PROCESS of MIXING is EXOTHERMIC, i.e., `DeltaH_("mixing")=-ve.` This implies that the solution shows a NEGATIVE deviation. | |
| 11475. |
When a crystal of the solute is introduced into a super saturated solution of the solute |
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Answer» the SOLUTE DISSOLVES |
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| 11476. |
Which one of the following is a non steroidal anti inflammatory drug? |
| Answer» Solution :ibuprofen | |
| 11477. |
Which of the following has tetragonal system? |
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Answer» `CaSO_4` |
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| 11478. |
Which oxide does not act as a reducing agent ? |
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Answer» NO |
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| 11479. |
The relative strength of inter-ionic/ intermolecular forces in the decreasing order is : |
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Answer» ion-dipole `gt` dipole-dipole `gt` ion-ion |
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| 11480. |
Which of the following petroleum corresponds to kerosene oil |
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Answer» `C_15-C_18` |
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| 11481. |
Transition metals and their compounds contain catalystic property, because…. |
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Answer» they POSSESS MAGNETIC PROPERTY |
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| 11482. |
Which of the following is liquid at room temperature ? |
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Answer» `CH_(3)I` |
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| 11483. |
What volume of 0.25mol of oxygen occupy at 8.2atm pressure and 127^(@)C according to ideal gas law ? |
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Answer» 1L |
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| 11484. |
Which of the following an reaction with H_(2)S will produce metal sulphide? |
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Answer» `COCl_(2)` C. `[Cd(CN)_(4)]^(2-)+H_(2)StoCdS+2H_(+)+4CN^(-)` D. `(Zn(OH)_(4)]^(2-)+H_(2)StoZnS+2OH^(-)+2H_(2)O` |
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| 11485. |
Which of the following is not an endothermic reaction |
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Answer» Dehydrogenation |
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| 11486. |
The statement " if0.003 molesof a gasaredissolvedin 900g ofwaterunder a pressureof1 atmosphere , 0.006 moleswill bedissolvedundera pressureof2 atmospheres". Illustrates : ____. |
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Answer» Dalton'slawof PARTIAL PRESSURE |
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| 11487. |
Which is most readily nitrated |
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Answer» Benzene |
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| 11488. |
Which of the following compounds exhibits stereoisomerism? |
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Answer» 2-Methylbutanoic ACID |
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| 11489. |
Writethenameofthemethodofconcentratedappliedforthefollowingores:(i) Zincblende (ii) Haematite (iii) Bauxite |
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Answer» SOLUTION :(i) ZINC blende-Frothfloatationsinceitisasulphideore. (II) Haematite-Hydraulicwashingsince oreparticles are heavierthanimpuritiesofsilicaandclay. (III) Bauxite-LeachingwithNaOHsinceoreparticlesaresolubleinNaOHbutimpuritiesare not. |
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| 11490. |
What happens when a freshly prepared precipitate of Fe(OH)_3 is shaken with a small amount of FeCl_3 solution ? |
| Answer» Solution :When a FRESHLY prepared PRECIPITATE of `Fe(OH)_3` is shaken with a small amount of `FeCl_3` solution, we obtain a colloidal solution of `Fe(OH)_3`. This process is KNOWN as PEPTISATION | |
| 11491. |
Which of the following Freundlich adsorption isotherm represents the adsorption of a gas by a solid (P_s=Saturation pressure) |
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Answer»
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| 11492. |
Which of the following equation solution will have higher boiling point at1atm. Pressure ? |
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Answer» `1M FeCl_(3)` |
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| 11493. |
Which of the following packing is more efficient: |
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Answer» square CLOSE - PACKING |
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| 11494. |
Which of the following statements is right in a compound |
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Answer» a halogen ATOM bonded to sp-c arbon atom is an alkyl HALIDE |
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| 11495. |
Under what conditions, glucose is converted to gluconic acid and saccharic acid ? |
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Answer» Solution :Glucose is CONVERTED to gluconic ACID when oxidized by `Br_(2)//H_(2)O`and oxidized to saccharic acid in presence of conc. `HNO_(3)` `{:(""CHO),("|"),(" "(CHOH)_(4)),("|"),(""CH_(2)OH):}overset(Br_(2)"WATER")rarrunderset("Gluconic acid")({:(""COOH),("|"),(" "(CHOH)_(4)),("|"),(""CH_(2)OH):})` `{:(""CHO),("|"),(" "(CHOH)_(4)),("|"),(""CH_(2)OH):}overset("Conc. "HNO_(3))rarrunderset("Saccharic acid")({:(""COOH),("|"),(" "(CHOH)_(4)),("|"),(""COOH):})` |
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| 11496. |
Vapour pressure of pure acetone and chloroform at 328 K are 741.8 mm Hg and 632.8 mm Hg respectively. Assuming that they form ideal solution over the entire range of composition, plot P_("total"), P_("chloroform"), and P_("acetone") as a function of x_("acetone"). The experimental data observed for different compositions of mixture is :{:(100x x_("acetone"),0,11.8,23.4,36.0,50.8,58.2,64.5,72.1),(P_("acetone")//mm Hg,0,54.9,110.1,202.4,322.7,405.9,454.1,521.1),(P_("chloroform")//mm Hg,632.8,548.1,469.4,359.7,257.7,193.6,161.2,120.7):}From the question, we have the following data. |
Answer» SOLUTION :`{:(x_("ACETONE"),0,11.8,23.4,0.360,0.508,0.582,0.645,0.721),(P_("acetone")//mm Hg,0,54.9,110.1,202.4,322.7,405.9,454.1,521.1),(P_("chloroform")//mm Hg,632.8,548.1,469.4,359.7,257.7,193.6,161.2,120.7),(P_("total"),632.8,603.0,579.5,562.1,580.4,599.5,615.3,641.8):}` It can be observed from the graph that the plot for the `P_("total")` to the solution curves DOWNWARDS. Therefore, the solution shows NEGATIVE deviation from the IDEAL behaviour. |
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| 11497. |
Which of the compound show optical isomerism ? 1.cis-[Co(NH_(3))_(4)Cl_(2)]^(+) ""2.trans-[Co(en)_(2)Cl_(2)]^(+) 3. cis-[Co(en)_(2)Cl_(2)]^(+)"" 4.[Co(en)_(3)]^(3+) Select the correct answer using the codes given below: |
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Answer» 1 and 2 (2) `trans-[Co(en)_(2)Cl_(2)]^(+)` has plane of symmetry as well as centre of symmetry , so optically inactive. (3 ) `cis-[co(en)_(2)Cl_(2)]^(+)` lacks plane of symmetry as well as centre of symmetry , so optically active. (4) `[Co(en)_(3)]^(3+)` lacks AXIS of INTERNAL rotation, so optically active. |
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| 11498. |
Which of the following pairs of ions are isoelectronic and isostructural? |
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Answer» `CO_(3)^(2-),NO_(3)^(-)` Thus `CO_(3)^(2-)` and `NO_(3)^(-)` are ISOELECTRONIC. Further both `CO_(3)^(2-)` and `NO_(3)^(-)` are planar since C as well N atoms are `sp^2` hybridized |
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| 11499. |
The total number of electrons present in 18mL. Water(density 1g/mL) is: |
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Answer» `6.023xx10^(23)` NUMBER of molecules of `H_(2)O` in 18g mass `=6.023xx10^(25)` Number of electrons in 18g water `=6.023xx10^(@3)xx10` `=6.023xx10^(24)` `because ` Each MOLECULE of water contains 10 electrons. |
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| 11500. |
Which is solubein NaNO_(2)and dil HClformingsalt ? |
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Answer» `(CH_(3))_(3)CNH_(2)` `(CH_(3))_(3) N + HNO_(2) to (CH_(3))_(3) NH^(+) Cl^(-)` |
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