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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.
| 29551. |
The IUPA name of the following compounds is: CH_(3)-overset(O)overset(||)(C)-CH_(2)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-CN |
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Answer» 4-cyano-4-methyl-2-oxopentane |
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| 29552. |
The isotopic mass of ""_(92)^(238)U is 238.125 a.m.u. Its packing fraction is : |
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Answer» 5.25 |
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| 29553. |
The isotopic abundance of C-12 and C-14 is 98% and 2% respectively : What would be the number of C-14 isotope in 12 g carbon sample : |
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Answer» `1.032 XX 10^22` |
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| 29554. |
The isotopes .^(238)U and .^(235)U occur in nature in the mass ratio 140 : 1. it is assumed that intially they were found in equal mass. If half life (t_(1//2)) of .^(238)U=4.5xx10^(9) and t_(1//2) of .^(235)Uxx10^(8)years respectively then the age of earth is (log 7=0.846,log2=0.3) |
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Answer» `4.02xx10^(9)` YEAR |
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| 29555. |
The industrial preperation of chloroform employs acetone and : |
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Answer» SODIUM chloride |
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| 29556. |
The isotopes of elements were discovered by : |
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Answer» Soddy |
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| 29557. |
The isotope .^(14)C undergoes radioactive decay slowly. Which mode of decay is most likey? |
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Answer» ALPHA emission |
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| 29558. |
The isotope ""_(92)^(235) U decays in a number of steps to an isotope of ""_(87)^(207)Pb. The no of particles emitted in this process will be : |
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Answer» `4 ALPHA` `a = (235- 207)/(4) = 7 alpha , 92- 82 = 2 (7) - b , 10 = 14- b IMPLIES b = 4 beta` |
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| 29559. |
The indicator which is obtained by coupling the diazonium salt of sulphanilic acid with N, N-dimethylaniline is: |
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Answer» indigo |
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| 29560. |
The isopropyl alcohol and n-propyl alcohol can be distinguished chemically by ….. |
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Answer» ALKALINE SOLUTION of iodine |
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| 29561. |
The isomersim exhibited by C_(2)H_(5)-O-C_(2)H_(5) and CH_(3)-O-underset(CH_(3))underset(|)(CH)-CH_(3) is __________ |
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Answer» FUNCTIONAL |
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| 29562. |
The isomers which can be converted into one another by free rotation about carbon-carbon bond are called : |
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Answer» CONFORMATIONS |
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| 29563. |
The isomers whose structures differ markedly in arrangment of atoms, but which exist in equilibrium are called : |
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Answer» METAMERS |
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| 29564. |
The individual members of the lanthanide series is called as |
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Answer» LANTHANIDES |
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| 29565. |
The isomers which can be converted into another forms by rotations of the molecules around single bond are |
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Answer» GEOMETRICAL isomers |
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| 29566. |
The indicator used in the titration of iodine against sodium thiosulphateis |
| Answer» Answer :A | |
| 29567. |
The isomer(s) of [Co(NH_(3))_(4)Cl_(2)] that has/have a Cl-Co-Cl angle of 90^(@), is /are : |
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Answer» MERIDIONAL and trans  cis isomer has `Cl–Co–Cl` ANGLE of `90^(@)` |
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| 29568. |
The isomerism which exists between CH_(2)ClCH_(2)ClandCH_(3)CHCl_(2) is : |
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Answer» POSITION isomerism |
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| 29569. |
The isomerism possible in [Pt(en)_(2) Br_(2)]Cl_(2) is…… . |
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Answer» |
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| 29570. |
The indicator used in the titration of sodium carbonate with sulphuric acid is |
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Answer» Phenolphthalein |
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| 29571. |
The isomerism that arises due to restricted bond rotation is: |
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Answer» OPTICAL isomerism |
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| 29572. |
The indicator used in the titration of sodium carbonate with sulphuric acid is : |
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Answer» POTTASIUM ferrocyanide |
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| 29573. |
The isomerism possible in [CO(NH_(3))_(5)(NO_(2))]^(2+) is……… . |
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Answer» |
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| 29574. |
The isomerism not shown by alkyl halides is …….. |
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Answer» CHAIN ISOMERISM |
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| 29575. |
The isomerism exhibited by the co-ordination complex [Cr(NH_3)_2(H_(2)O)_(2)Cl_2]^(+) are : |
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Answer» ionisation, OPTICAL |
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| 29576. |
The indicator that is obtained by coupling the diazonium salt of sulphanilic acid with N, N-dimethylaniline is |
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Answer» phenanthroline |
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| 29577. |
The isomerismexhibitedby primaryand secodanry nitroalkane to showaci -formis |
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Answer» positionisomerism |
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| 29578. |
The isomerism exhibited by n-butyl alcohol and isobutyl alcohol is: |
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Answer» Metamerism |
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| 29579. |
The isomerism exhibited by n-butyl alcohol and isobutyl alcohol is |
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Answer» CHAIN |
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| 29580. |
The isomerism exhibited by CH_(3)CH_(2)COOHandCH_(3)COOH_(3) is ________ |
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Answer» metamerism |
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| 29581. |
The isomerism exhibited by 1-nitro butane and 1-nitro-2-methyl propane is………….. |
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Answer» chain |
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| 29582. |
The isomerisation of 1-butyne to 2 -butyne can be achieved by treatment with |
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Answer» HYDROCHLORIC acid `CH_(3) underset("1-Butyne")(CH_2C) -= CH overset("ALC." KOH)underset(DELTA)(to) CH_(3) -underset(2-"Butyne")(C-=C)- CH_(3)` |
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| 29583. |
The isomeric compounds 'A' and 'B' with molecular formula C_7 H_9 N give the following reactions. When B is acetylated and then brominated, it gave one monobromo derivative. 'A' when treated with NaNO_2 and HCl gave the compound 'C'. 'C' was heated with acetic acid in the presence of conc. H_2 SO_4, a pleasant smelling liquid (D) was obtained. 'B' was treated with NaNO_2 and HCl in cold condition and treated with beta-Naphthol in NaOH to give an orange red dye. 'A' is |
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Answer» o-toluidine |
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| 29584. |
The isomeric compounds 'A' and 'B' with molecular formula C_7 H_9 N give the following reactions. When B is acetylated and then brominated, it gave one monobromo derivative. 'A' when treated with NaNO_2 and HCl gave the compound 'C'. 'C' was heated with acetic acid in the presence of conc. H_2 SO_4, a pleasant smelling liquid (D) was obtained. 'B' was treated with NaNO_2 and HCl in cold condition and treated with beta-Naphthol in NaOH to give an orange red dye. 'D' is |
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Answer»
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| 29585. |
The indicator phenol red is half in the ioic form when pH is 7.2. If the ratio of the undissociated form to the ionic form is 1 : 5, find the pH of the solution. With the same pH for solution, if indicator is altered such that the ratio of undissociated form to dissociated form becomes 1 : 4, find the pH when 50% of the new indicator is in ionic form. |
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Answer» |
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| 29586. |
The isomeric compounds 'A' and 'B' with molecular formula C_7 H_9 N give the following reactions. When B is acetylated and then brominated, it gave one monobromo derivative. 'A' when treated with NaNO_2 and HCl gave the compound 'C'. 'C' was heated with acetic acid in the presence of conc. H_2 SO_4, a pleasant smelling liquid (D) was obtained. 'B' was treated with NaNO_2 and HCl in cold condition and treated with beta-Naphthol in NaOH to give an orange red dye. 'B' is |
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Answer» BENZYLAMINE |
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| 29587. |
Theisomerisation of 1-butyne to 2-butyne can be achieved by treatment with- |
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Answer» hydrochloric acid |
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| 29588. |
The isomeric compounds ‘A’ and 'B' with molecular fomula C_(7)H_(9)N gave the following reactions. When B is acetylated and then brominated, it gave one monobromo derivative. 'A' when treated with NaNO_(2) and HCI gave the compound 'C'. 'C' was heated with acetic acid in the presence of conc. H_(2)SO_(4), a pleasant smelling liquid (D) was obtained. 'B' was treated with Na ‘A’ is |
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Answer» o-toluidine 
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| 29589. |
The indicator methyl orange is prepared by coupling diazonium salt of sulphanilic acid with: |
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Answer» Aniline |
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| 29590. |
The isomeric compounds ‘A’ and 'B' with molecular fomula C_(7)H_(9)N gave the following reactions. When B is acetylated and then brominated, it gave one monobromo derivative. 'A' when treated with NaNO_(2) and HCI gave the compound 'C'. 'C' was heated with acetic acid in the presence of conc. H_(2)SO_(4), a pleasant smelling liquid (D) was obtained. 'B' was treated with Na 'D' is |
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Answer»
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| 29591. |
The isomeric cis-2-butene and trans-2-butene can be distinguished on the basis of: |
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Answer» Their OPTICAL properties |
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| 29592. |
The indicator use in the titrating oxalic acid with caustic soda solution is : |
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Answer» METHYL orange |
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| 29593. |
The isomeric compounds ‘A’ and 'B' with molecular fomula C_(7)H_(9)N gave the following reactions. When B is acetylated and then brominated, it gave one monobromo derivative. 'A' when treated with NaNO_(2) and HCI gave the compound 'C'. 'C' was heated with acetic acid in the presence of conc. H_(2)SO_(4), a pleasant smelling liquid (D) was obtained. 'B' was treated with Na ‘B’ is |
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Answer» benzylamine 
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| 29594. |
The isomer of diethyl ether is |
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Answer» `(CH_(3))_(2)CHOH` |
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| 29595. |
The isomer of C_(7)H_(7)Cl having weakest C-Cl bond is : |
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Answer» o-Chlorotoluene |
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| 29596. |
Theisomerof C_(5) H_(13) N'A on reaction withnitrousacid gives-2- Methyl-2- butanolthe isomer 'B'on reactionwithacetyl chloridegives N- ethyl-N-isopropylacetamide Whereas isomer'C'have noreactionwith aceticanhydridewhich of thefollowingare A, B and C ? |
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Answer» 2-methyl -2- butanamineN-ethyl-2- PROPANAMINE N-ethyl - N- methylehtanamine Isomer A(Primaryamine ) `CH_(3)- underset( CH_(3) ) underset(|) (CH) -NH -C _(2) H_(5) +CH_(3) COCI to ` `CH_(3) - underset( CH_(3))underset(|)(C H)- overset(COCH_(3)) overset(|) (N)- C_(2) H_(5)` Isomer B(Secondaryamine) `C_(2) H_(5)-underset( CH_(3) ) underset(|)( N) - C_(2)H_(5) +(CH_(3) CO )_(2)O to` Noreaction |
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| 29597. |
The indicator methyl orange is prepared by coupling dia- zonium salt of sulphanilic acid with |
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Answer» Aniline 
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| 29598. |
The isomer of an oxime is: |
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Answer» `R-NO_(2)` `therefore R-CONH_(2)` will will be the the isomer of oxime. |
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| 29599. |
The isoelectronic species K^(+),Cl^(-),S^(2-) and Ca^(2+) can be arranged in the following decreasing order of size: |
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Answer» `CA^(2+)gtK^(+)GTCL^(-)gtS^(2-)` `(S^(2-)""Cl^(-)""K^(+)""Ca^(2+)),(+16""+17""+19""+20)` |
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| 29600. |
The indicator constant of phenolphthalein is approximately 10^(-8).A solution is prepared by adding 100.01 c.c. of 0..01 N sodium hydroxide to 100.00 c.c. of 0.01 N hydrochloric acid.If a few drops of phenolphthalein are now added.what traction of the indicator is converted to its coloured form ? |
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Answer» `1/3` So, NaOH left =0.0001 Hence, CONCENTRATION of `OH^(-) =0.0001/200.01=0.0001/200` `HPhhArr H^+ + Ph^(-)` `K_a=([H^+][Ph^(-)])/([HPH])` `implies 10^(-8)=(k_w[Ph])/([OH^(-)][HPh])=((10xx^(-14)xx[Ph])/0.0001)/(200)[HPh], " " ([Ph^(-)])/([HPh])=1/2` so `([Ph^(-)])/([Ph^(-)]+[HPh])=1/3` |
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