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.	Butylated hydroxy anisole is
Answer» An ANTIOXIDANT Cleansing agent DISINFECTANT An ANTIHISTAMINE SOLUTION :Butylated HYDROXYL anisole is an antioxidant.

2.	Butyl rubber is copolymer of
Answer» ISOBUTYLENE and VINYL CHLORIDE isobytylene and CHLOROPRENE isobytane and chloroprene isobutylene and isoprene Answer :D

3.	Butylamine (I), diethylamine (II) and N, N-dimethylethylamine (III) have the same molar mass. The increasing order of their boiling points is
Answer» `III lt II lt I` `I lt II lt III` `II lt III lt I` `II lt I lt III` Solution :Extent of H-bonding INCREASES as the number of H-atoms on the N-atoms increases and HENCE boiling points increases in the ORDER: `3^(@) lt 2^(@) lt 1^(@), i.e., III lt II lt I`

4.	Butyl rubber is addition polymer of
Answer» iso-butylene and ISOPRENE iso-butylene and CHLOROETHANE iso-butylene and CHLOROPRENE iso-butylene and CHLOROMETHANE ANSWER :A

5.	Butyl Magnesium bromide reacts with propanone to give ……………………… .
Answer» SOLUTION : 2-methyl hexan-2-ol

6.	Butyl rubber is
Answer» ADDITION co-polymer CONDESATION co-polymer Addition homopolymer condensation heteropolymer ANSWER :A

7.	Butter of tin is
Answer» `(NH_(4))_(2)SCI_(8)``SnCl_(2)+SN(OH)_(2)` `H_(2)SnCI_(4)` ANSWER :C

8.	Butter of tin is :
Answer» `SnCl_2.5H_2O` `SnCl_4. 5H_2O` `SnBr_2. 2H_2O` `SnBr_4. 5H_2O` ANSWER :B

9.	Butter is a colloid. It is formed when
Answer» fat is dispersed in solid casein fat GLOBULES are dispersed in WATER water is dispersed in fat casein is SUSPENDED in water Answer :C

10.	Butter is a colloid formed when
Answer» WATER is DISPERSED in fat Fat is dispersed in water Fat GLOBULES are dispresed in water Water is dispersed in oil Answer :A

11.	Butter is a colloid formed when:
Answer» FAT is dispersed in water fat GLOBULES are dispersed in water water is dispersed in fat suspension of CASEIN in water. Answer :C

12.	Butene-2 exhibits:
Answer» GEOMETRICAL isomerism Optical isomerism Metamerism None of these Answer :A

13.	Butene -1 can be converted to butane by reaction with :
Answer» `Pd//H_2` ZN/HCL `SN -HCl` Zn,Hg Answer :A

14.	Butene-1 can be converted to butane by reaction with :
Answer» `Pd//H_(2)` ZN, HCl SN, HCl Zn, Hg ANSWER :A

15.	Butanone oxime on reduction with Na//C_2H_5OH gives
Answer» `3^(@) ` amine ` 1^(@) ` amine ` 2^(@) ` amine `1^(@) ` amine ANSWER :B

16.	Butanone and butanal are
Answer» chain ISOMERS POSITION isomers functional isomers tautomers ANSWER :C

17.	Butanol has higher boiling point than Butanal. Justify.
Answer» Solution :The BOILING point of butanol is high due to strong INTERMOLECULAR hydrogen bonding whereas butanal has only WEAK dipole - dipole INTERACTION.

18.	Butanone & propanone were allowed to react is presence of OH,total aldol products is
Answer» SOLUTION :

19.	Butanol on reaction with one of the following will produce banana odour :
Answer» `PCl_5` `CH_3COCl` `Ch_3OCH_3` `NH_3` ANSWER :B

20.	Butanenitrile is formed by reaction of KCN with
Answer» PROPYL ALCOHOL BUTYL CHLORIDE Butyl alcohol Propyl chloride ANSWER :D

21.	Butanenitrile may be prepared by heating
Answer» Propyl alcohol with KCN Butyl alcohol with KCN Butyl CHLORIDE with KCN Propyl chloride with KCN. Solution :`underset("Propyl chloride")(CH_(3)CH_(2)CH_(2)CL)+KCN rarrunderset("Butanenitrile")(CH_(3)CH_(3)CH_(2)CN)+KCL`

22.	Butane nitrile can be prepared by heating
Answer» PROPYL ALCOHOL with KCN butyl alcohol with KCN butyl CHLORIDE with KCN propyl chloride with KCN Solution :propyl chloride with KCN

23.	Butanecan beconvertedinto2- methylpropane ifheatedwith :
Answer» `Al_(2)Cl_(6)` `Cr_(2) O_(3) ` `CrO_(2) Cl_(2) ` Na / ether Answer :A

24.	Butane nitrile may be prepared from alcoholic KCN and what?
Answer» n-propyl bromide n-butyl bromide n-butyl alcohol n-propyl alcohol Solution :n-butane NITRILE is `CH_(3)CH_(2)CH_(2)C_(2)CN`. It is PREPARED from n-proply bromide and alcoholic KCN `CH_(3)CH_(2)CH_(2)Br+KCN overset(alc) to CH_(3)CH_(2)CH_(2)CN+KBr`

25.	Butane nitrile may be prepared by heating:
Answer» PROPYL ALCOHOL with KCN Butyl alcohol with KCN Butyl CHLORIDE with KCN Propyl chloride with KCN Answer :D

26.	Butane nitrile is formed by reaction of KCN with
Answer» PROPYL alcohol butyl chloride butyl alcohol propyl chloride. Solution :`CH_(3)CH_(2)CH_(2)Cl underset(-KCL) overset(KCN)rarr underset("Butane nitrile")(CH_(3)CH_(2)CH_(2)CN)`

27.	Butane -2-ol is
Answer» PRIMARY alcohol Secondary alcohol Tertiary alcohol Aldehyde Answer :B

28.	Butane - 2 - ol is
Answer» PRIMARY ALCOHOL SECONDARY alcohol TERTIARY alcohol aldehyde Answer :B

29.	Butanol-1 to butanoic acid .
Answer» SOLUTION :`CH_(3) CH_(2) CH_(2) CHO overset(CrO_(3) - H_(2) SO_(4))(to) CH_(3) CH_(2) CH_(2) COOH`

30.	Butanal with dilute NaOH gives
Answer» `CH_(3)CH_(2)CH_(2)UNDERSET(H)underset(\|)overset(OH)overset(\|)"C"CH_(2)CH_(2)CH_(2)CH_(2)OH` `CH_(3)CH_(2)CH_(2)overset(O)overset(\|\|)C"CHO"CH_(2)CH_(2)CHO` `OH"C"CH_(2)CH_(2)CH_(2)CH_(2)CH_(2)CH_(2)CHO` `CH_(3)CH_(2)CH_(2)underset(H)underset(\|)overset(OH)overset(\|)C-underset(CH_(3))underset(\|)underset(CH_(2))underset(\|)CHCHO` Solution :`2CH_(3)-CH_(2)-CH_(2)-CHO+"DIL."NaOH to CH_(3)CH_(2)CH_(2)-underset(H)underset(\|)overset(OH)overset(\|)C-overset(CHO)overset(\|)CH-CH_(2)-CH_(3)`

31.	Write chemical reactions of affect the Butanal to butanoic acid transformations.
Answer» SOLUTION :`CH_3CH_2CH_2CHO OVERSET(CrO_3-H_2SO_4)(RARR)CH_3CH_2CH_2COOH`

32.	Butanal is heated with ammonical silver nitrate. The product formed is ,
Answer» `CH_(3_CH_(2)CH_(2)COOH` `(CH_(3))_(2)CHCOOH` `CH_(2)COOH + CH_(3)OH` `HCOOH + C_(2)H_(5)COOH` Answer :A

33.	Butanal is an example of
Answer» PRIMARY ALCOHOL SECONDARY alcohol ALIPHATIC aldehyde aliphatic ketone Answer :C

34.	Butan-2-one will not react with
Answer» SEMICARBAZIDE ACETALDEHYDE SCHIFF ' s reagent Thioalcohol Solution :It does not restore the PINK colour of schiff's reagent .

35.	Butan-2-one can be converted to propanoic acid by which of the following:
Answer» `NAOH,NaI//H^(+)` Fehling solution `NaOH,I_(2)//H^(+)` Tollens' reagent Solution :`underset("Butan-2-one")(CH_(3)COCH_(2)CH_(3)) underset((ii)H^(+))OVERSET((i)NaOH//I_(2))toCHI_(3)`.

36.	Butan-2-ol is :
Answer» PRIMARY alcohol Secondary alcohol Tertiary alcohol None Answer :B

37.	Butadiene and acrylonitrile polymer is known as
Answer» nylon-66 nylon-26 buna-S Buna-N ANSWER :D

38.	Buta-N synthetic rubber is copolymer of
Answer» `H_2C=CH-CH=CH_2 and C_6H_5CH=CH_2` `H_2C=CH-CN and H_2C=CH-CH=CH_2` `H_2C=CH-CN and H_2C=CH-UNDERSET(CH_3)underset(\|)(C)=CH_2` `H_(2)C=CH-OVERSET(CI)overset(\|)(C)=CH_2 and H_2C=CH-CH=CH_2` Answer :B

39.	Buna-S rubber is also known as _____.
Answer» SOLUTION :BUTADIENE STYRENE RUBBER

40.	But-2-yne on reaction with sodium in liquid ammonia produces
Answer» butyne trans-2-butene cis-2-butene no reaction Solution :When there is no acidic HYDROGEN in alkyne (i.e. "absence of"=-=CH) Na//Liq.NH_(3)` ACTS as a reducing agent `Na+NH_(3) to NaNH_(3)+(1)/(2)H_(2)` It REDUCES alkyne to trans-alkene. But-2-yne will give trans-2-butene

41.	But -2eneon ozonolyisfollowed by subsequent cleavage with Zn and watergives
Answer» ETHANAL propanal propanone METHANAL SOLUTION :ethanal

42.	But-2-ene exhibits cis-trans-isomerism due to
Answer» rotaion AROUND `C_(3)-C_(4)` SIGMA bond restricted rotation around C=C bond rotation around `C_(1)-C_(2)` bond rotation around `C_(2)-C_(3)` double bond Answer :B

43.	But – 2 – ene gives 2 moles of ethanal by..........
Answer» SOLUTION :OZONOLYSIS

44.	But - 1- yne on hydration in the presence of 40%H_(2)SO_(4) " and "10%HgSO_(4) gives
Answer» ANSWER :B

45.	But-1-yne and But-2-yne can be distinguished by :
Answer» `Br_(2)//C Cl_(4)` `KMnO_(4)//overset(THETA)(O)H aq.("cold")` `(AgNO_(3)+NH_(4)OH)` All Answer :C

46.	But -2 - en -1- olon oxidation by using PCCgives
Answer» BUTAN -1- ol butanal but -2- EN- AL butan -2-one ANSWER :C

47.	Write the relavant chemical equations : But-1-ene to but-2-ene
Answer» Solution :`CH_(3)-CH_(2)-CH= CH_(2) OVERSET(HBr)rarr CH_(3)-CH_(2)-overset(overset(Br)(\|))(CH)-CH_(3) UNDERSET(Delta)overset("Alc.KOH)rarr CH_(3)-CH=CH-CH_(3)`

48.	But-1-ene on reaction with HCl in the presence of sodium peroxide yields
Answer» n-BUTYL chloride isobutyl chloride secondary butyl chloride tertiary butyl chloride Answer :A::B::C::D

49.	But-1-ene to 1-iodo butane
Answer» Solution :`CH_(3)-CH_(2)-CH=CH_(2) underset("peroxide")overset(HBR)rarr CH_(3)-CH_(2)-CH_(2)-overset(overset(Br)(\|))(CH_(2)) underset("Acetone")overset(KI)rarr CH_(3)-CH_(2)-CH_(2)-overset(overset(I)(\|))(C )H_(2)`

50.	But-1-ene oin reaction with HCl in the presence of sodium peroxie yields.
Answer» N BUTYL CHLORIDE ISOBUTYL chloride secondary butyl chloride tertiary butyl chloride Answer :C