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.	Isosters are compounds having similar geometry and isoelectronic species are species having the same number of electrons. The pair of species CO_(2) and NO_(2) is
Answer» isosteric and isoelectronic isosteric, but not isoelectronic isoelectronic, but not isosteric neither isosteric nor isoelectronic Answer :A

2.	Isopropylamine can be obtained by
Answer» `(CH_(3))_(2)C=O+NH_(2)OH to?OVERSET(LiAlH_(4))to` `(CH_(3))_(2)CO+NH_(3) underset(Delta)overset(Ni//H_(2))to` `(CH_(3))_(2)CH-Br+NaNH_(2)to` `(CH_(3))_(2)CH-Br overset(NaN_(3))to?overset(LiAlH_(4))to` SOLUTION :`NaNH_(2)` brings out DEHYDROBROMINATION to from PROPANE.

3.	Ketones can be prepared by the oxidation of which type alcohol ?
Answer» SOLUTION :SECONDARY ALCOHOL

4.	Isopropyl chloride undergoes hydrolysis by ……
Answer» `SN^(1)` mechanisn `SN^(2)` MECHANISM `SN^(1)` and `SN^(2)` mechanism Neither `SN^(1)` nor `SN^(2)` mechanism SOLUTION :Isopropyl being `2^(@)` ALKYL halide can undergo hydrolysis either by `S_(N)1` or `S_(N)2` reaction.

5.	Isopropyl methyl ether when treated with cold hydrogen iodide gives
Answer» isopropyl IODIDE and methyl iodide isopropyl ALCOHOL and methyl iodide isopropyl alcohol and methyl alcohol isopropyl iodide and methyl alcohol ANSWER :B

6.	Ketones cannot be prepared by
Answer» Rosenmud's reaction The HYDROLYSIS of TERMINAL gen DIHALIDES The OXIDATION of primary alcohols All of these Answer :D

7.	Isopropyl magnesiumbromide with dry ether an methanol gives
Answer» `CH_(3)-underset(OH) underset(\|)(CH)-CH_(2)-CH_(3) and CH_(3)-CH_(2)-MGBR` `CH_(3)-CH_(2)-CH_(3) and CH_(3)-CH_(2)-OMgBr` `CH_(3)-CH_(2)-CH_(3) and CH_(3) OMgBr` `CH_(3) -underset(CH_(3)) underset(\|)(CH)-CH_(3) and CH_(3) and CH_(3) OMgBr` Answer :C

8.	Ketones can not be easily oxidised with mild oxidising agents like Tollen's reagent of Fehling's solution.
Answer» ANSWER :F

9.	Isopropyl chloride undergoes hydrolysis by
Answer» `SN^(-1) ` MECHANISM `SN^(2) ` mechanism `SN^(1)and SN^(2) `MECHANISMS ETHER `SN^(1) "or" SN^(2) ` mechanism Answer :D

10.	Isopropyl chloride undergoes hydrolysis by :
Answer» `S_(N)1` MECHANISM `S_(N)2` mechanism `S_(N)1 and S_(N)2` mechanism neither `S_(N)1 ` nor `S_(N)2` mechanism Answer :C

11.	Ketones can be prepared by the oxidation of which type of alcohol ?
Answer» SOLUTION :SECONDARY ALCOHOL

12.	Ketones can be prepared by the oxidatin of ________ (primary alcohol, Secondary alcohol)
Answer» SOLUTION :SECONDARY ALCOHOL

13.	Write the relavant chemical equations : Isopropyl bromide to n-propyl bromide
Answer» SOLUTION :`CH_(3)-overset(overset(Br)(\|))(CH)-CH_(3) overset("Alc. KOH")RARR CH_(3)-CH=CH_(2) underset("PEROXIDE")overset(HBr)rarr CH_(3)-CH_(2)-overset(overset(Br)(\|))(CH_(2))`

14.	Isopropyl amineonacetylationgives
Answer» `(CH_(3))_(2)CH - NCOHCH_(3)` `(CH_(3))_(2)CH-NHCOCH_(3)` `(CH_(3))_(2)CHN(COCH_(3))_(2)` `(CH_(3))_(2)CHN(OCH_(3))_(2)` Answer :C

15.	Isopropyl amine can be obtained by
Answer» `(CH_(3))_(2)CHO+NH_(2)Ohto(A)overset(LiAlH_(4))to` `(CH_(3))_(2)CHO+NH_(3)to(A)overset(H_(2)//Ni)to` `(CH_(3))_(2)CHOH+NH_(3)to` none of these Answer :A::B::C

16.	Isopropyl alcohol underset(Delta )overset(H^+ //K_2 Cr_2 O_3)tofinalproduct
Answer» PROPENE PROPANOL ETHANAL ETHANOICACID ANSWER :D

17.	Ketones can be prepared by :
Answer» ROSENMUND reduction Stephen's SOLUTION Both (a) and (B) NONE ANSWER :D

18.	Ketones can be obtained in one step by ,
Answer» HYDROLYSIS of esters oxidation of PRIMARY alcohols oxidation of secondary alcohols reaction of ACID unhydride and ALCOHOL . ANSWER :C

19.	Isopropyl alcohol on passing over heated copper at 300^@C gives :
Answer» Propylene Acetaldehyde Acetone None Answer :C

20.	Isopropyl alcohol on oxidation gives:
Answer» Acetone Ether Ethylene Acetaldehyde Answer :A

21.	Isopropyl alcohol onoxidation forms
Answer» ACETONE ETHER ACETALDEHYDE ester Answer :A

22.	Isopropyl alcohol is used as ………………….. For injection.
Answer» SOLUTION :SKIN CLEANSER

23.	Isopropyl alcohol on oxidation forms
Answer» acetone ether ethylene acetaldehyde Answer :A

24.	Ketones are prepared by:
Answer» Clemenson's reduction Rosenmund reduction Oppenauer oxidation Cannizzaro's reaction Answer :C

25.	Isopropyl alcohol is oxidised by CrO_3 gives,
Answer» `CH_3COCH_3` `CH_3COOH` `CH_3CH=CH_2` `CH_3CHO` SOLUTION :`(CH_3)_2CHOH + [O] OVERSET"OXIDATION"to CH_3COCH_3 + H_2O`

26.	Ketones can be obtained in one step by :
Answer» Hydrolysis of ESTER Oxidation of primary alcohols Reaction of ACID halide with alcohols Oxidation of secondary alcohol Answer :D

27.	Isopropyl alcohol is obtained by reacting which of the following alkenes with conc. H_(2)SO_(4) and H_(2)O
Answer» Ethylene Propylene 2-methyl propene Isoprene Solution :`CH_(3)-CH=CH_(2)+H_(2)O UNDERSET("Markonifoff's rule")overset(CONC. H_(2)SO_(4))to ` `CH_(3)-underset("Isopropyl ALCOHOL ")underset(OH)underset(\|)(CH)-CH_(3)`

28.	Isopropyl alcohol is heated on a water bath with the suspension of bleaching powder. Which of the following products will be formed ?
Answer» isopropyl chloride trichloromethane propane ETHANOL SOLUTION :REFER to Haloform reaction.

29.	Explain why aldehydes are more reactive than ketones towards nucleophilic addition reactions ?
Answer» ANSWER :F

30.	Isopropyl alcohol and n-propyl alcohol, both have the same molecular formula C_3H_8O . A solution of the two, that is, 25% isopropyl alcohol by mass, has a total vapour pressure of 0.09 atm at a given temperature. A solution of the two, that is, 75% isopropyl alcohol by mass, has a total vapour pressure of 0.12 atm at the same temperature. Find the vapour pressures of the pure alcohols at this temperature.
Answer» SOLUTION :0.135 ATM, 0.075 atm

31.	Isopropyl alcohol and propyl alcohol are :
Answer» POSITION isomers Chain isomers Functional isomers None Answer :A

32.	Ketones are isomeric with
Answer» alcohols aldehydes ester acetic acid Answer :B

33.	Isoprophyl alcohol on oxidation forms
Answer» Acetone Ether Ethylene Acetaldehyde Solution :`CH_(3)-underset(OH)underset(\|)CH-CH_(3)underset(KMnO_(4))OVERSET("OXIDATION")to underset("Acetone")(CH_(3)-underset(O)underset(\|\|)C-CH_(3))`

34.	Ketones are less reactive than aldehydes because:
Answer» C=O group is LESS POLAR in ketones of electromeric effect Of STERIC hindrance to the attacking reagent None Answer :C

35.	Ketones are generally less reactive than Aldehydes in nucleophilic addition reactions because
Answer» Carbonyl CARBON in ketones is sterically more PROTECTED and more electrophilic Carbonyl carbon in ALDEHYDES is sterically more protected and more electrophilic Carbonyl carbon in aldehydes is sterically LESS protected and less electrophilic Carbonyl carbon in ketones is sterically more protected and less electrophilic Answer :D

36.	Isoprene,CH_(2)=C-underset(CH_(3))underset(\|)(CH)=CH_(2),is the repeating unit in:
Answer» VITAMIN `A` TERPENES RUBBER (NATURAL) All the above ANSWER :D

37.	Isoprophylbenzene on air oxidation in the presence of dilute acid gives…………………
Answer» `C_6H_5COOH` `C_6H_5COCH_3` `C_6H_5COC_6H_5` `C_6H_5-OH` SOLUTION :`C_6H_5-OH`

38.	Ketones and 1^(@) amine react to form
Answer» Amides Oximes Urea Schiff's BASES ANSWER :4

39.	Isoprophlbenzene on air oxidation in the presence of dilute acid gives
Answer» `C_(6)H_(5)COOH` `C_(6)H_(5)COCH_(3)` `C_(6)H_(5)CHO` `C_(6)H_(5)OH` Solution :ACIDIC hydrolysis of CUMENE hydropenoxide

40.	Isoprene unit present in
Answer» terpenes waxes phospholipids glycolipids Answer :A

41.	Ketones are first oxidation product of:
Answer» PRIMARY alcohols Secondary alcohols Dihydric alcohols Tertiary alcohols Answer :B

42.	Ketones and 1@ aminest react to form :
Answer» AMIDES OXIMES Urea Anils Answer :D

43.	Ketone (A), which indergoes halform reaction, give compound (B) on reduction. (B) on heating with H_(2)SO_(4) gives compound (C ), which forms mono-ozonide (D). (D) on hydrolysis in the presence of Zn dust gives only acetaldehyde. Identify (A). (B), and (C ). Write down the reactions involved.
Answer» Solution :Ketone `(A)` gives HALOFORM reaction, so it must contain `(Me-CO-)` group. Ketone on reduction gives `2^(@)` alcohol. (B), which gives alkene `(C )` with `H_(2)SO_(4)`. Alkene on ozonolysis FOLLOWED by reduction with `Zn` dust gives `MeCHO`. So, the structure of alkene `(C )` is: So `(A)` is: Butan-`2`-one, `(B)` is: Butan-`2`-ol, `(C )` is: Butan-`2`-one.

44.	Ketone never show
Answer» CHAIN ISOMERISM POSITION isomerism GEOMETRICAL isomerism optical isomerism ANSWER :C

45.	Ketone is the first oxidative product of,
Answer» `1^@` ALCOHOL `3^@` alcohol `2^@` alcohol acid Answer :C

46.	Isoprene is used for making :
Answer» RUBBER Petrol Liquid fuel None Answer :A

47.	Ketol in the following compounds is
Answer» . . ANSWER :D

48.	Ketohexoses do NOT contain__________.
Answer» `-CHO` GROUP `-OH` group `-CH_2OH ` group NONE of these ANSWER :A

49.	Keto-enol tautomerism is observed in:
Answer» `C_(6)H_(5)-CHO` `C_(6)H_(5)COCH_(3)` `C_(6)H_(5)COC_(6)H_(5)` `C_(6)H_(5)COCH_(2)COCH_(3)` Answer :A::C

50.	Isoprene is synthetic rubber?
Answer» SOLUTION :Buna-S is a SYNTHETIC RUBBER.