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.	Ethylene glycol is prepared by the hydrolysis of __________ .
Answer» `{:(CH_(2)BR),(\|),(CH_2Br):}` `{:(CH-OH),(\|\|),(CHCl):}` `{:(CHO),(\|),(CHO):}` `{:(CH_2),(\|\|),(CH_2):}` ANSWER :A

2.	Ethylene glycol, glycol (ethane-1,2-diol), the simplest glycol may be prepared by
Answer» `(i),(ii)` `(i),(iv),(iii)` `(i),, (ii), (iii)(iv)` `(i), (ii), (iv)` Solution :(i) `CH_(2)=CH_(2)+H_(2)O+[O]overset(Cold dilute)underset(KMnO_(4),OH^(-))(rarr) underset(OH)underset(\|)(CH_(2))-underset(OH)underset(\|)(CH_(2))+KOH +MnO_(2)` (ii) `CH_(2)=CH_(2)+HOClrarrClCH_(2)CH_(2)OHoverset(aq.NaHCO_(3))(rarr)HOCH_(2)CH_(2)OH+NaCl+CO_(2)`We can ALSO boil ethlene chlorohydrin with milk of lime: The low yield in this reaction is due to the conversion of some ethylene dibromide into vinyl BROMIDE: `BrCH_(2)CH_(2)Br+Na_(2)CO_(3)rarrCH_(2)=CHBr+NaBr+NaHCO_(3)` If aqueous sodium hydroxide is used instead of sodium carbonate, vinyl bromide is again obtained as a byproduct. the best yield of glycol is obtained by heating ethylene dibromide with potassium acetate in glacial acetic acid and subsequently hydrolysing the glycol diacetate with hydrogen chloride in methanolic solution `BrCH_(2)CH_(2)Br+2CH_(3)COOKrarrCH_(2)(OCOCH_(3))CH_(2)(OCOCH_(3))+2KBroverset(HCl)(rarr)HOCH_(2)CH_(2)OH` (iv) Ethylene oxide is made by passing ethylene andair over a silver catalyst at `300^(@)C`. Notice that glycol is prepared INDUSTRIALLY by this method and also by the CATALYTIC reduction of methyl glycollate: The first three methods are used for the laboratory preparation of glycol

3.	Ethylene glycol, CH_(2)OH*CH_(2)OH the major component of permanent antifreeze, effectively depresses the freezing point of water in an automobile radiator. What minimum weight of ethylene glycol must be mixed with 6 gallons of water to protect it from freezing at -24^(@)C. (1 gallon =3.785 lit, K_(f)=1.86) ?
Answer» SOLUTION :We have, `DeltaT_(F)=K_(f)XX` molality `:.` molality `=(DeltaT_(f))/(K_(f))=(24)/(1.86)=12.90` (f.p. of `H_(2)O=0^(@)C`) Thus, `1kg` of `H_(2)O` should contain `12.90` moles of ethylene GLYCOL. `:.22.7kg` (i.e., 6 gallons) of `H_(2)O` should contain `12.90xx22.7` moles `=(12.90xx22.7xx62)g` `=18155g` `=18.155kg` of `CH_(2)OHCH_(2)OH` `(CH_(2)OHCH_(2)OH=62)`

4.	Ethylene glycol is dehydrated to diethylene glycol by _________.
Answer» CONC. `H_(3)PO_(4)` conc. `H_(2)SO_(4)` and anydrous `ZnSO_(4)` anhy. `ZnCl_(2)` HEAT as 773 K Answer :A

5.	Ethylene glycol and phthalic acid are monomers of
Answer» NYLON - 6 Glyptal Buna - S Terylene Answer :B

6.	Ethylene from ethyl bromide is obtained by treating it with :
Answer» Hydrogen Alcoholic CAUSTIC potash Aqueous caustic potash Aqueous caustic soda Answer :B

7.	Ethylene forms ethylene chlorohydrin by the action of :
Answer» DRY chlorine GAS Dry HYDROGEN chloride gas Solution of chlorine gas in water Dilute hydrochloric acid Answer :C

8.	Ethylene dibromide (C_(2)H_(4)Br_(2))and 1, 2 - dibromo propane from a series of ideal solutions over the whole range of composition. At 85^(@)C, the vapour pressure of these two liquids are 173 and 127 torr respectively. What would be the mole fraction of ethylene dibromide in a solution at 85^(@)C equilibrated with 1:1 molar mixture in the vapour?
Answer» Solution :Suppose the mole fraction of ethyene dibromide in the liquid phase = x. Then mole fraction of 1, 2- dibromo PROPANE will be `=1-x`. Vapour pressure of ethylene dibromide `=x xx p^(@)=x xx"173 TORR = 173 x torr"` Vapour pressure of 1, 2- dibromo propane `=(1-x)xx"127 torr"` As they have `1:1` molar ratio in the vapour phase, `173x=(1-x)xx127 or 173x=127-127x or 300x=127 or x=(127)/(300)=0.423.`

9.	Ethylene dichloride and ethylidine chloride are isomeric compounds. The false statement about these isomers is that they
Answer» REACT with alcoholic POTASH and give the same product Are position isomers Contain the same percentage of chloride Are both hydrolysed to the same product Solution :On hydrolysis, ethylene dichloride gives ethylene glycol. While ethylidine chloride gives acetaldehyde.

10.	Ethylene dichloride can be prepared by adding HCl to :
Answer» ETHANE Ethylene Acetylene Ethylene glycol Answer :D

11.	Ethylene dichloride and ethylidene chloride are isomeric compounds. Identify the statement Which is not applicable to both of them:
Answer» React with ALCOHOLIC potash react with aqueous potash and give the same PRODUCTS Are DIHALIDES Beilstein test Answer :B

12.	Ethylene diamine tetraacetate has the structure as………. .
Answer» ANSWER :`(##FM_CHE_XII_V01_C05_E03_085_A01##)`

13.	Fill in the blanks Ethylene diamine is an example of …. ligand.
Answer» SOLUTION :BIDENTATE

14.	Ethylene diamine is an example of hexadentate ligand:True/false
Answer» SOLUTION :BIDENTATE

15.	Ethylene diamine is an example of a………. Ligand :
Answer» monodentate bidentate tridentate hexdentate Answer :B

16.	Ethylene chloride and ethylidene chloride are isomers. Identify the correct statements.
Answer» both the compounds form same product on treatment with alcoholic KOH Both the compounds form same product on treatment with alcoholic KOH Both the compounds form same product on reduction. Both the compounds are optically active. Solution :Both the compounds form same product. i.e., acetylene on treatment with alc. KOH `UNDERSET("Ethylene CHLORIDE")(ClCH_(2))-CH_(2)Cl"or"underset("Ethylidene chloride")(CH_(3)CHCl_(2)) underset(-2" HCl")overset("Alc. KOH")to underset("Acetylene")(HC-=CH)` (b) both the compounds form different products on treatment with aq. NaOH. `underset("Ethylene chloride")({:(CH_(2)Cl,),(\|,),(CH_(2)Cl,):})overset(Aq." "NaOH)to underset("Ethylene glycol")({:(CH_(2)OH,),(\|,),(CHCl_(2),):}) overset(Aq.NaOH)to {:(CH_(3),),(\|,),(CH(OH)_(2),):}underset(-H_(2)O)to underset("Acetaldehyde")({:(CH_(3),),(\|,),(CHO,):})` (c) Both the compounds form same product, i.e., ethane on reduction. `ClCH_(2)CH_(2)Cl` or `CH_(3)CHCl_(2) overset("Reduction")to underset("Ethane")(CH_(3)-CH_(3))+2HCl` (d) Both the comounds are not optically active. thus, options (a) and (c) are correct.

17.	Ethylene can be prepared by electrolysis of an equeous solution of
Answer» SODIUM acetate Sodium succinate Sodium fumarate Sodium propionate Answer :B

18.	Ethylene can be prepared by electrolysis of an aqueous solution of:
Answer» SODIUM acetate Sodium succinate Sodium fumarate Sodium propionate Answer :C

19.	Ethylene can be formed by electrolysis of which sodium sald
Answer» OXALIC acid fumaric acid glutaric acid Succinic acid Answer :D

20.	Ethylchloride to propanamine-1
Answer» SOLUTION :`CH_(3)- CH_(2)-CL overset(KCN)RARR CH_(3)CH_(2)CN overset(LiAlH_(4))rarr CH_(3)-CH_(2)-CH_(2)-NH_(2)`

21.	Ethylbenzene withbrominein the presenceofFeBr_(3)gives :
Answer» ANSWER :D

22.	Ethylbenzene can be prepared from benzene by Friedel- Crafts reaction in the following manner. (i) by treating with ethyl chloride in presence of AICI_(3) (ii) by treating excess of benzene with ethyl chloride in presence of AICI_(3) (iii) by treating benzene with vinyl chloride in presence of AICI_(3) followed by reduction (iv) by acetylation of benzene followed by Clemmerisen reduction
Answer» by (IV) by(II), (III), and (iv) by (ii) by (iii) and (iv) ANSWER :A, C

23.	Ethylbenzene to benzoic acid
Answer» SOLUTION :

24.	Ethylamine undergoes oxidation in the presence of KMNO_(4) to give:
Answer» Ethylamine UNDERGOES oxidation in the PRESENCE of `KMnO_(4)` to give :acid alcohol aldehyde Answer :C

25.	Ethylamine to ethyl alcohol
Answer» Solution :ETHYLAMINE to ethyl alcohol : `underset("ethylamine")(C_(2)H_(5)-NH_(2))+HO-N=Ooverset(NaNO_(2)+"dil. HCL")rarrunderset("ethyl alcohol")(C_(2)H_(5)OH)+H_(2)O+N_(2)uarr`

26.	Ethylaminereacts withof the followingto giveethylammonium chloride ?
Answer» HCI `PCI_(5)` `SOCI_(2)` `PCI_(3)` Solution :Ethylaminebeingbasicin N/Ature.Reactswith acid.

27.	Ethylamine reacts with nitrosyl chloride (NOCl) to form:
Answer» ETHYL chloride Ethyl alcohol Ethyl NITRITE Nitro ETHANE Answer :A

28.	Ethylamine reacts with nitrosyl chloride (NOCI) to form:
Answer» ETHYL CHLORIDE ethyl ALCOHOL ethyl NITRITE nitroethane Answer :A

29.	Ethylamine reacts with nitrosyl chloride (NO) to form
Answer» ETHYL chloride Ethyl alcohol Ethyl nitrite Nitroethane. Solution :`C_(2)H_(5)NH_(2)+NOCl rarr C_(2)H_(5)Cl +N_(2)+H_(2)O`

30.	Ethylamine on heating with CS_(2) in presence of HgCl_(2) forms
Answer» `C_(2)H_(5)NCS` `(C_(2)H_(5))_(2)S` `(C_(2)H_(5))_(2)CS` `C_(2)H_(5)(CS)_(2)`. Answer :A

31.	Ethylamine is soluble in water whereas aniline is almost insoluble. Why?
Answer» SOLUTION : Ethylamine forms H-bonds with water. Hence, it soluble in water. In contrast, the large hydrocarbon PART of ANILINE retards the tendency of `- NH_2` group to FORM HYDROGEN bonds with water. Hence, it is almost insoluble in water.

32.	Ethylaminecan beobtainedby theacitonof
Answer» `NH_(3) + C_(2) H_(5)L` `C_(2)H_(5)CN + 4H` both a and b `HCHO + NH_(3)` Answer :A

33.	Ethyl propionate is formed from ethyl iodide and what ?
Answer» `C_(2)H_(5)COOH` `C_(2)H_(5)COOAg` `(C_(2)H_(5)CO)_(2)O` All of these SOLUTION :`C_(2)H_(5)COOAg+C_(2)H_(5)I overset(Delta) tounderset("ethyl propionate")( AgI + C_(2)H_(5)COOC_(2)H_(5))`

34.	Ethylamine and diethylamine cannot be differentiated by :
Answer» Hinsberg test carbylamine test IODOFORM test both (a) and (B) SOLUTION :`Et-NH_(2) RARR -ve` iodoform `Et-NH-Et rarr -ve` iodoform

35.	Ethylacetate reacts with NH_(2)NHCONH_(2) to form :
Answer» `CH_(3)CONHCONHNH_(2)` `CH_(3)CON(NH_(2) )CONH_(2)` `CH_(3)CH_(2)NHNHCONH_(2)` `CH_(3)CONHNHCONH_(2)` Answer :D

36.	Ethyl propanote on reduction with LiAIH_4 yields :
Answer» Methanol ETHANOL and Propanol Propane Mixture of ethanol and methanol Answer :B

37.	Ethyl phenyl ether is reacted with cold conc. HBr gives
Answer» PHENOL and ethane bromobenzene and ethane bromobenzene and bromoethane phenol and bromoethane Answer :D

38.	Ethyl orthoformate is formed by heating with sodium ethoxide
Answer» `CHCl_(3)` `C_(2)H_(5)OH` `HCO OH` `CH_(3)CHO` Solution :

39.	Ethyl methyl ketone is obtained by heatingcalcium salts of
Answer» fromic ACID + propionic acid ACETIC acid + propionic acid acetic acid only acetic acid + methanoic acid ANSWER :B

40.	Ethyl phenyl ether on reaction with excess HI yields
Answer» ETHYL iodide and iodobenzene Ethyl iodide and PHENOL Ethyl ALCOHOL and phenol Ethyl alcohol and iodobenzene ANSWER :B

41.	Ethyl methyl ketone is obtained by heating calcium salts of
Answer» formic acid + propionic acid ACETIC acid + propionic acid acetic acidonly acetic acid + methanoic acid Solution :ETHYL methyl ketone is an unsymmetric ketone , so two different acids (in the form of calcium salt) are used . The structure of ethyl methyl ketone is `C_(2)H_(5) COCH_(3)` The structure shows the presence of 4 CARBON atoms , thus the calcium salts must be of acetic acid and propionic acid to form `C_(2)H_(5)COCH_(3)` . `(C_(2)H_(5) COO)_(2) Ca + (CH_(3)COO)_(2) Ca overset("Distill")(to) C_(2)H_(5)COCH_(3) + CaCO_(3)`

42.	Ethyl methyl ketone is obtained by heating calcium salt of
Answer» FORMIC ACID + propionic acid acetic acid + propionic acid acetic acid only acetic + methanoic acid. Answer :B

43.	Ethyl lcohol on oxidation with K_(2)Cr_(2)O_(7) gives
Answer» Acetic acid Acetaldehyde Formaldehyde Formic acid SOLUTION :`CH_(3)CH_(2)OH overset(k_(2)Cr_(2)O_(7))to CH_(3)COOH`

44.	Ethyl isocyanide on hydrolysis in acidic medium generates
Answer» PROPANOIC ACID and ammonium salt ETHANOIC acid and ammonium salt methylamine salt and ethanoic acid ethylamine salt and methanoic acid Solution :`CH_3-CH_2N UNDERSET(to)= C + H_2O OVERSET(H^+) toCH_3CH_2NH_2+HCOOH`

45.	Ethyl methyl carbinol is,
Answer» n-BUTYL ALCOHOL t-butyl alcohol SEC. butyl alcohol isobutyl alcohol Answer :C

46.	Ethyl iodide when treated with dry silver oxide gives
Answer» Ethanol Diethyl ETHER ETHYLENE ETHANE ANSWER :B

47.	When ethyl Iodide is treated with dry silver oxide it forms
Answer» ETHYL ALCOHL DIETHYL ether silver ETHOXIDE ethyl METHYL ether Answer :D

48.	Ethyl iodide on treatment with sodium methoxide gives
Answer» `CH_3-O-CH_3` `C_2H_5OCH_3` `C_2H_5OC_2H_5` `C_2H_6` ANSWER :B

49.	Ethyl iodide when heated with sodium metal in dry ether yields:
Answer» `C_2H_4` `C_3H_8` `C_4H_10` `C_5H_12` ANSWER :C

50.	Ethyl iodide on treatment with dry Ag_2O will yield :
Answer» ETHYL alcohol Diethyl ether Ethyl METHYL ether Ethylene Answer :B