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.	Bleaching powder on treatment with CO_2 gives:
Answer» `O_2` `Cl_2` `HCL` `H_2` ANSWER :B

2.	Bleaching powder liberates "………" when treated with CO_(2) gas
Answer» `O_(2)` GAS `Cl_(2)` gas `O_(2)` and `Cl_(2)` GASES No gas is LIBERATED Answer :B

3.	Bleaching powder is obtained by the interaction of Cl_2 with a
Answer» DILUTE solution of `Ca(OH)_2` CONCENTRATED solution of `Ca(OH)_2` DRY CaO dry slaked lime Answer :D

4.	Bleaching powder is obtained by the action of Cl_(2) on :
Answer» `CaCl_(2)` `CaO` `CaCO_(3)` `Ca(OH)_(2).` Solution :`Ca(OH)_(2)+Cl_(2)rarr UNDERSET("BLEACHING powder")(CaOCl_(2))+H_(2)O`

5.	Bleaching powder is obtained by the interaction of chlorine and
Answer» Conc. SOLUTION of `Ca(OH)_(2)` Dilute solution of `Ca(OH)_(2)` DRY calcium oxide Dry SLAKED lime Solution :`underset("Slaked lime")(Ca(OH)_(2))+Cl_(2) to underset("POWDER")underset("Bleaching")(CaOCl_(2))+H_(2)O`

6.	Bleaching powder is not used:
Answer» As a disinfectant As a REDUCING agent For BLEACHING purposes For MANUFACTURING chloroform Answer :B

7.	Bleaching powder is obtained by interaction of Cl_2 and:
Answer» DIL. `Ca(OH)_2(aq)` DRY CaO Conc. `Ca(OH)_2 (aq)` Dry slaked lime Answer :A

8.	Bleaching powder is not used
Answer» As a disinfectent As a REDUCING agent For BLEACHING PURPOSE for MANUFACTURING choroform Answer :B

9.	Bleaching powder is mixed calcium salt of:
Answer» HCL and HCLO `HClO_2` and HCl HClO and `HClO_2` HCl and `HClO_3` ANSWER :A

10.	Bleaching powder is correctly represented as
Answer» `CaOCl_(2)` `CAO` `CaO (CL)` `CACL(O Cl)` Solution :

11.	Bleaching powder is an example:
Answer» An ACIDIC salt A COMPLEX salt A DOUBLE salt A MIXED salt Answer :D

12.	Bleaching powder is a mixed salt of
Answer» chloric & CHLOROUS acid hydrochloric acid & hypochlorous acid Hydro chloric acid & chloric acid Hydro chloric acid & chlorous acid Solution :`CaOCl_(2) rarr CA^(+2)+underset("Chloride")(CL^(-)) + underset("hypochlorite")(OCL^(-))`

13.	Bleaching powder is a mixture of:
Answer» CALCIUM hypochorite and calcium chloride Calcium CHLORATE and calcium chloride Calcium chlorate and BASIC calcium chloride Calcium chlorate and calcium hydroxide Answer :C

14.	Bleaching powder in the presence of insufficient quantity of dil. H_(2)SO_(4) acts as
Answer» OXIDISING AGENT REDUCING agent both oxidising and reducing agent LIBERATES AVAILABLE chlorine Answer :A

15.	Bleaching powder in te presence of insufficient quantity of dill H_(2)SO_(4) acts as
Answer» oxidising agent Reducing agent both oxidising and reducing agent Liberates availabe chlorine Solution :Bleaching POWDER liberaes oxygen with in sufficient DILUTE `H_(2)SO_(4)`

16.	Bleaching powder gives calcium chloride and oxygen on heating with
Answer» Mn-salts Co-salts CA-salts Fe-salts Solution :`CaOCl_(2)+H_(2)O to Ca(OH)_(2)+Cl_(2)`

17.	Bleaching powder dissolves in hot water to form
Answer» `Ca^(2+), CL^(-) and ClO^(-)` `Ca^(+2),Cl^(-),ClO_(2)^(-)` `Ca^(2+), Cl^(-) ClO_(3)^(-)` `Ca^(2+), Cl^(-) ClO_(4)^(-)` SOLUTION :Bleaching powder in HOT water under go Auto oxidation and gives CHLORIDE and chlorate ions

18.	Bleaching powder has the molecular formula:
Answer» `CaClO_3` CaClO `CaOCl_2` `CA(OCL)_2` ANSWER :C

19.	Bleaching powder contains a salt of an oxoacid as one of its components. The anhydride of that oxoacid is
Answer» `Cl_(2)O` `Cl_(2)O_(7)` `ClO_(2)` `Cl_(2)O_(6)` Solution :The active constituent of BLEACHING powder is `Ca(OCl)_(2)`. SINCE `OCl^(-)` is the anion, THEREFORE, the acid is HOCl and its anhydride is `underset("Acid")(2HOCl) rarr H_(2)O underset("Anhydride")(Cl_(2)O)`

20.	Bleaching powder and bleach solution are produced on a large scale and used in several household products. The affectiveness of bleach solution is often measured by iodometry. Bleaching powder contains a slat of an oxacid as one of its components. The anlydride of that oxoacid is
Answer» `Cl_(2)O` `Cl_(2)O_(7)` `ClO_(2)` `Cl_(2)O_(6)` Answer :A

21.	Bleaching powder and bleach solution are produced on a large scale and used in several household products. The affectiveness of bleach solution is often measured by iodometry. 25 ml of household bleach solution was mixed with 30 ml of 0.5 M KI and 10 ml of 4 N acetic acid.In the titratio of the liberated iodine, 48 mlof 0.25 N Na_(2)SO_(3) wasused to reach the end point. The moalirty of the household bleach solution is
Answer» 0.48 N 0.96 M 0.24 M 0.024 M Answer :C

22.	Bleaching action of chlorine is due to:
Answer» Reduction Oxidation Chlorination Hydrogenation Answer :D

23.	Bleaching action of SO_2 is due to :
Answer» Reduction Oxidation Hydrolysis Acidic nature Answer :A

24.	Bleaching action of SO_(2) is due to :
Answer» reduction oxidation acidic nature hydrolysis. Answer :A

25.	Bleaching action of chlorine is permanent - Justify this statement and also give the uses of chlorine.
Answer» Solution :Chlorine is a strong oxidising and bleaching agent because of the nascent oxygen. `H_(2)O+Cl_(2) to HCl+underset("Hypo chlorous acid")(HOCl)` `HOCl to HCl +(O)` Colouring matter + Nascent oxygen `to` Colourless OXIDATION product Therefore, bleaching of chlorine is permanent. It oxidises ferrous salts to ferric, SULPHITES to sulphates and hydrogen sulphide to sulphur. (i) `underset(("Ferrous"))(2FeSO_(4))+H_(2)SO_(4)+HOCl to underset(("Ferric"))(Fe_(2)(SO_(4))_(3)+HCl +H_(2)O` (ii) `underset(("Sulphite"))(Na_(2)SO_(3))+HOCl to underset(("Sulphate"))(Na_(2)SO_(4))+HCl` (iii) `underset(("Sulphide"))(H_(2)S)+Cl_(2) to underset(("Sulphur"))(2HCL)+S` Use of chlorine: 1. Purification of DRINKING water 2. Bleaching of cotton TEXTILES, paper and rayon 3. It is used in extraction of gold and platinum

26.	Bleaching action of chlorine is due to :
Answer» reduction hydrogenation chlorination oxidation Answer :D

27.	Bleaching action of chlorine is permanent. Justify this statement.
Answer» Solution :Chlorine is a strong oxidising and bleaching agent because of the NASCENT oxygen. `H_(2)O+Cl_(2)RARR underset("Hypo chlorous acid")(HCl+HOCl)` `HOClrarr HCl+(O)` `"Colouring matter"+"Nascent oxygen"rarr"Colourless OXIDATION product"` Therefore, bleaching of chlorine is permanent. It oxidises ferrous salts to ferric, SULPHITES to sulphates and hydrogen sulphide to sulphur. (i) `underset("(Ferrous)")(2FeSO_(4))+H_(2)SO_(4)+HOClrarr underset("(Ferric)")(Fe_(2)(SO_(4))_(3))+HCl+H_(2)O` (ii) `underset("(Sulphite)")(Na_(2)SO_(3))+HOClrarr underset("(Sulphate)")(Na_(2)SO_(4))+HCl` (iii) `underset("(Sulphide)")(H_(2)S)+Cl_(2)rarr underset("(Sulphur)")(2HCl)+S`

28.	Bleaching action of chlorine in presence of moisture is :
Answer» Reduction Oxidation Hydrolysis Substitution Answer :B

29.	Blasting of TNT is done by mixing it with:
Answer» `NH_4Cl` `NH_4NO_3` `NH_4NO_2` `(NH_4)_2SO_4` ANSWER :B

30.	Blast furnace is employed in the smelting of oxide ore with coke and flux in the metallurgy of __________.
Answer» Iron copper Aliminium both (A) and (B) ANSWER :D

31.	Blast furnace is used in the extraction of the metal
Answer» Coper Iron Zinc Silver Answer :B

32.	Blast furnace is employed in the smelting of oxide ore with coke and flux in the metallurgy of
Answer» IRON COPPER Lead All the above Answer :D

33.	Blanc fixe is :
Answer» `BaSO_4` `BaCl_2` `BaCO_3` None Answer :A

34.	Black solid underset(Delta)overset(KOH+Air)to underset(("green"))((A))overset(H_(2)SO_(4))to underset(("purple"))((B))+(C) (i) KI on reaction with alkali solution of (B) changes into a compound (D). (ii) The colour of the compound (B) disappears on treatment with the acidic solution of FeSO_(4) (iii) With cold conc. H_(2)SO_(4) compound (B) gives (E), which being explosive decomposes to yield (F) and oxygen. ltBrgt Q. Colour of the solution obtained, when ferrous sulphate reacts with acidic solution of (B):
Answer» Colourless Pink Green Yellow Solution :`underset("Black solid")(2MnO_(2))+4KOH+O_(2) to underset("green (A)")(2K_(2)MnO_(4))+2H_(2)O` `3MnO_(4)^(2-)+4H^(+) to underset((B))(2MnO_(4)^(-)+underset("(C) purple")(MnO_(2))+2H_(2)O)` (i) `2KMnO_(4)+H_(2)O+KI to 2KOH +2MnO_(2)+underset((D))(KIO_(3))` (ii) `2KMnO_(4)+8H_(2)SO_(4)+10FeSO_(4) to 2MnSO_(4)+5Fe_(2)(SO_(4))_(3)+K_(2)SO_(4)+8H_(2)O` (iii) `2KMnO_(4)+H_(2)SO_(4) overset("cold")to underset((E))(Mn_(2)O_(7))+K_(2)SO_(4)+H_(2)O` `underset((E))(Mn_(2)O_(7)) to underset((F))(2MnO_(2))+(3)/(2)O_(2)` `6KMnO_(4)+10FeC_(2)O_(4)+24H_(2)SO_(4) to 6MnSO_(4) +underset(("yellow"))(5Fe_(2)(SO_(4))_(3))+20CO_(3)+3K_(2)SO_(4)+24H_(2)O` `3NaSCN+FeCl_(3) to underset("Blood red colouration")(Fe(SCN)_(3)darr)+3NaCl`

35.	Black solid underset(Delta)overset(KOH+Air)to underset(("green"))((A))overset(H_(2)SO_(4))to underset(("purple"))((B))+(C) (i) KI on reaction with alkali solution of (B) changes into a compound (D). (ii) The colour of the compound (B) disappears on treatment with the acidic solution of FeSO_(4) (iii) With cold conc. H_(2)SO_(4) compound (B) gives (E), which being explosive decomposes to yield (F) and oxygen. ltBrgt Q. Which of the following options is correct?
Answer» (C) and (F) are same compounds having same colour. (C) and (F) are DIFFERENT compounds having same colour. Compound (B) forms similar compound (E) with hot and conc.` H_(2)SO_(4)`. Compound (A) does not give same TYPE of REACTION in acidic and neutral medium Solution :`underset("Black solid")(2MnO_(2))+4KOH+O_(2) to underset("green (A)")(2K_(2)MnO_(4))+2H_(2)O` `3MnO_(4)^(2-)+4H^(+) to underset((B))(2MnO_(4)^(-)+underset("(C) purple")(MnO_(2))+2H_(2)O)` (i) `2KMnO_(4)+H_(2)O+KI to 2KOH +2MnO_(2)+underset((D))(KIO_(3))` (ii) `2KMnO_(4)+8H_(2)SO_(4)+10FeSO_(4) to 2MnSO_(4)+5Fe_(2)(SO_(4))_(3)+K_(2)SO_(4)+8H_(2)O` (iii) `2KMnO_(4)+H_(2)SO_(4) overset("cold")to underset((E))(Mn_(2)O_(7))+K_(2)SO_(4)+H_(2)O` `underset((E))(Mn_(2)O_(7)) to underset((F))(2MnO_(2))+(3)/(2)O_(2)` `6KMnO_(4)+10FeC_(2)O_(4)+24H_(2)SO_(4) to 6MnSO_(4) +underset(("YELLOW"))(5Fe_(2)(SO_(4))_(3))+20CO_(3)+3K_(2)SO_(4)+24H_(2)O` `3NaSCN+FeCl_(3) to underset("Blood red colouration")(Fe(SCN)_(3)darr)+3NaCl`

36.	Black solid underset(Delta)overset(KOH+Air)to underset(("green"))((A))overset(H_(2)SO_(4))to underset(("purple"))((B))+(C) (i) KI on reaction with alkali solution of (B) changes into a compound (D). (ii) The colour of the compound (B) disappears on treatment with the acidic solution of FeSO_(4) (iii) With cold conc. H_(2)SO_(4) compound (B) gives (E), which being explosive decomposes to yield (F) and oxygen. ltBrgt Q. Nature of compound (E) is:
Answer» Acidic oxide Basic oxide Amphoteric oxide Neutral oxide Solution :`underset("Black SOLID")(2MnO_(2))+4KOH+O_(2) to underset("green (A)")(2K_(2)MnO_(4))+2H_(2)O` `3MnO_(4)^(2-)+4H^(+) to underset((B))(2MnO_(4)^(-)+underset("(C) purple")(MnO_(2))+2H_(2)O)` (i) `2KMnO_(4)+H_(2)O+KI to 2KOH +2MnO_(2)+underset((D))(KIO_(3))` (II) `2KMnO_(4)+8H_(2)SO_(4)+10FeSO_(4) to 2MnSO_(4)+5Fe_(2)(SO_(4))_(3)+K_(2)SO_(4)+8H_(2)O` (iii) `2KMnO_(4)+H_(2)SO_(4) overset("cold")to underset((E))(Mn_(2)O_(7))+K_(2)SO_(4)+H_(2)O` `underset((E))(Mn_(2)O_(7)) to underset((F))(2MnO_(2))+(3)/(2)O_(2)` `6KMnO_(4)+10FeC_(2)O_(4)+24H_(2)SO_(4) to 6MnSO_(4) +underset(("yellow"))(5Fe_(2)(SO_(4))_(3))+20CO_(3)+3K_(2)SO_(4)+24H_(2)O` `3NaSCN+FeCl_(3) to underset("Blood red colouration")(Fe(SCN)_(3)DARR)+3NaCl`

37.	Black HgS:
Answer» DISSOLVES in cone . Hcl on BOILING Dissolves in boiling HCL + a CRYSTAL of `KClO_3` Dissolves in NaOH NONE Answer :B

38.	Black-foot disease is caused due to groundwater contaminated with excess of
Answer» Mercury Sulphur Arsenic Fluoride Answer :C

39.	Black Jack is an ore of
Answer» Cr Sn Zn Ni Solution :BLACK Jack(ZNS), ALSO, called zinc BLENDE, is an ore of Zinc

40.	Black ash is:
Answer» NAOH + CAS NaHCO_3 + COS` Na_2CO_3 + CaS` Na_2CO_3 + CoS` ANSWER :C

41.	Biuret test is used for the detection of:
Answer» SATURATED oils Sugars Proteins Fats Answer :B

42.	Biuret test is used for the detection of :
Answer» urea Proteins CARBOHYDRATES polypeptide. Answer :C

43.	Biuret test is not given by
Answer» urea proteins carbohydrates polypeptides Solution :All compounds CONTAINING `-NH-CO-`, i.e., peptide bond GIVE biuret test. THUS, OPTION (c) is correct.

44.	Bithional is used as:
Answer» Tranquillizer Antiseptic Analgesic Disinfectant Answer :B

45.	Bithional is generally added to the soaps as an additive to function as an
Answer» BUFFERING agent antiseptic softner dryer Answer :B

46.	Bithional is generally added to the soaps as an additive to function as a/an
Answer» BUFFERING agent antiseptic softener dryer ANSWER :B

47.	Bithional is generally added to the soaps as an additive to function as a/an:
Answer» Softener Dryer Buffering agent Antiseptic Solution :Antiseptic Bithional (the COMPOUND is also CALLED bithional) is ADDED to SOAPS to impart - antiseptic PROPERTIES.

48.	Bithional is generally added to the soaps as an additive to function as a//an
Answer» DRYER BUFFERING agent Antiseptic Softner SOLUTION :BITHIONAL is ADDED to soapsto impartantisepticproperties.

49.	Bithional is generally added to soaps as an additive to functionis a/an
Answer» BUFFERING agent antiseptic softener drying agent Answer :B

50.	Bithional is an example of
Answer» disinfectant ANTISEPTIC antibiotic analgesic Solution :Bithional is a well KNOWN antiseptic, ADDED in soaps to reduce ODOURS produced by bacterial decomposition of organic matter of skin.