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.

Match the ore (Column I) with the metal (Column II)

Answer»

(i)-`("C")` , (ii)-(A), (iii)-(B), (IV)-(E)
(i)-`("C")` , (ii)-(A), (iii)-(B), (iv)-(D)
(i)-(E) , (ii)-`("C")`, (iii)-(B), (iv)-(E)
(i)-(D) , (ii)-(A), (iii)-(B), (iv)-(E)

Solution :(i)-`("C")` , (ii)-(A), (iii)-(B), (iv)-(E)
Discussion
2.

Match the observations of Column-I with inferences in Column-II

Answer»


ANSWER :A-P,Q;B-R,S;C-S;D-R,S
Discussion
3.

Match the nature of aqueous solutions of the substances listed in Column I with the character listed in Column II. {:(,"Column I",,"Column II"),((A),KCN_((aq)),(p),"Strongly basic"),((B),TiOH_((aq)),(q),"Neutral"),((C),BeCl_(2(aq)),(r),"Weakly basic"),((D),NaNO_(3(aq)),(s),"Weakly acidic"):}

Answer»


Solution :`(A)CN^(-)+H_(2)OrarrHCN+OH^(-)`
(Anionic HYDROLYSIS), `pHgt7`), weakly basic
`(B) TiOH"(STRONG base)"rarrTi^(+)+OH^(-)(pHgtgt7),` strongly basic
`(C)Be^(2+)+2H_(2)OrarrBe(OH)_(2)+2H^(+)("cationic hydrolysis "pHgt7 ), "weakly ACIDIC"`
`(D)NaNO_(3)" "("SALT of strong base NaOH and strong acid "HNO_(3))`
`rarr` No hydrolysis of the cation or the anion, pH=7 , neutral
Discussion
4.

Match the name of the processes given in column-I with type of metallurgical methods given in column-II. {:("Column-I","Column-II"),((a)"Hall-Heroult process",(p)"Molten" Al_2O_3+Na_3AIF_6 "electrolysis"),((b)"Dow's sea water process",(q)"Molten" MgCl_2+CaCl_2+NaCl "electrolysis"),((c)"Hoop's process",(r)"Molten impure aluminium + fluorides of" Na^+, Ba^(2+) and Al^(3+)"electrolysis"),((d)"Mac-Arthur Forrest process",(s)"Complex formation and displacement method"):}

Answer»


Solution :(a)Half-Heroult PROCESS is the electrolytic reduction of molten `Al_2O_3` dissolved in cryolite or fluorspar.
(b)Dow's sea water process involves the isolation of Mg from sea water as `MgCl_2` and then electrolytic reduction of molten `MgCl_2` dissolved in `CaCl_2` and NaCl.
(c)HOOP's process is the electrolytic PURIFICATION of impure aluminium.The cell has three liquid layers middle one contains fluorides of `Na^(+),Ba^(2+), and Al^(3+)`, lower most layer has impure Al.
(d)Mac-Arthur forest cyanide process is the process used for the EXTRACTION of gold and silver.Extraction of gold and silver involves LEACHING the metal with `CN^(-)` .the metal is later recovered by displacement method.
Discussion
5.

Matchthe name reaction( column I)with thereagent( columnII)used .

Answer»

(i) -B ,(II)-D
(i) -B ,(ii )-A
(i) -C , (ii )-D
( i)-C,(ii )-A

Answer :A
Discussion
6.

Match the observations of Column-I with inferences in Column-II

Answer»


ANSWER :A-Q,S;B-Q,S;C-P,R;D-S
Discussion
7.

Match the molecules/species listed in column I with characteristic listed in column II. {:("Column-I","Column-II"),((A)Cl F_5","BrF_4^(+)IF_6^(-),(p)"All molecules/ions are polar in nature"),((B)Cl F_3","BrF_2^(+)IC I_4^(-),(q)"All molecules/ions have same number of lone pair(s) and identical shape"),((C )Xe F_2","IC I_2^(-)I_3^(-),(r)"All molecules/ions have same oxidationstate of central atoms"),((D )CIOF_3","CIF_4^(+)","IO_2F_2^(-),(s)"All molecules/ions have same hybridisation of central atoms"),(,(t)"All molecules/ions are isoelectrnic species"):}

Answer»


SOLUTION :
Discussion
8.

Match the methods of concentration of ore given in column-I with the different ores given in column-II and select the correct option. column-I (I) magnetic separation (II) froth flotation (III) hydraulic washingcolumn-II (a) Cu_2S (b) Fe_3O_4 (c) Al_2(SiO_3)

Answer»

I(a), II(B), III(C)
I(b), II(a), III(c)
I(c), II(a), III(b)
I(b), II(c), III(a)

ANSWER :B
Discussion
9.

Match the method of concentration of the ore in column I with the ore in column II and select the correct alternate. {:(""I,""II),("(X) Magnetic separation",(A) Ag_(2)S),("(Y) Froth floatation","(B)" FeCr_(2)O_(4)),("Z Gravity separation","(C)"Al_(2)(SiO_(3))_(3)):}

Answer»

`{:(X,Y,Z),(A,B,C):}`
`{:(X,Y,Z),(B,A,C):}`
`{:(X,Y,Z),(C,A,B):}`
`{:(X,Y,Z),(B,C,A):}`

ANSWER :B
Discussion
10.

Match the method used (Column I) with the metal for which it is used (Column II)

Answer»

(i)-`("C")` , (ii)-(A), (III)-(D), (IV)-(B)
(i)-`("C")` , (ii)-(B), (iii)-(A), (iv)-(D)
(i)-`("C")` , (ii)-(D), (iii)-(B), (iv)-(D)
(i)-`("C")` , (ii)-(A), (iii)-(B), (iv)-(D)

Solution :(i)-`("C")` , (ii)-(A), (iii)-(B), (iv)-(D)
Discussion
11.

Match the method (column I) with its example (column II)

Answer»

(i)-`("C")` , (II)-(A)
(i)-`("C")`, (ii)-(B)
(i)-(A) , (ii)-(B)
(i)-(B), (ii)-(A)

SOLUTION :(i)-`("C")` , (ii)-(A)
Discussion
12.

Match the metal ions given in Column I with the spin magnetic moments of the ions given in Column II and asign the correct code:

Answer»

`{:(A,B,C,D),(iv,v,ii,i):}`
`{:(A,B,C,D),(i,ii,iii,iv):}`
`{:(A,B,C,D),(iv,i,ii,iii):}`
`{:(A,B,C,D),(iii,v,i,ii):}`

Solution :SPIN magnetic moment `(mu)` of all the cations MAY be calculated as follows:
A.`Co^(3+),[Ar]3d^(6)(n=4),mu=sqrt(4(4+2))=sqrt(24)BM`
B. `Cr^(3+),[Ar]3d^(3)(n=3),mu=sqrt(3(3+2))=sqrt(15)BM`
C. `Fe^(3+),[Ar]3d^(5)(n=5),mu=sqrt(5(5+2))=sqrt(35)BM`
D. `Ni^(2+),[Ar]3d^(8)(n=2),mu=sqrt(2(2+2))=sqrt(8)BM`
Thus, A-iv,B-v,C-ii,D-I
THEREFORE, a is the correct match.
Discussion
13.

Match the metal ions given in Column I with the spin magnetic moments of the ions given in Column H and assign the correct code

Answer»


ANSWER :C
Discussion
14.

Match the List with List II and select the correct answer from the codes given below the lists : List I (Reaction) (A) CH_(3)CH=CHCHOrarrCH_(3)CH=CHCOOH (B) CH_(3)CH=CHCHOrarrCH_(3)CH=CHCH_(2)OH (C) R-COOHrarrR-CH_(2)OH (D) CH_(3)CH_(2)COHlrarrCH_(3)CH_(2)CHO List II (Reagent) (1). LiAlH_(4) 2. NaBH_(4),LiAlH_(4) 3. Ammoniacal AgNO_(3)

Answer»

`{:(A,B,C,D),(4,3,2,1):}`
`{:(A,B,C,D),(1,2,3,4):}`
`{:(A,B,C,D),(3,1,2,4):}`
`{:(A,B,C,D),(2,3,1,4):}`

ANSWER :C
Discussion
15.

Match the medicine given in Column I with theiruses given inColumn

Answer»


Answer :(i)—(C), (II)—(d), (III)—(a), (iv)—(b)
Discussion
16.

Match the maximum number of CH_(3)MgX consumed, per molecule given in Column -II, when the substrates given in Column -I reacts with it.

Answer»


SOLUTION :N//A
Discussion
17.

Match the maximum number of CH_(3)MgX consumed, per mole, given in Column -II, when the substrates given in Column -I reacts with it.

Answer»


SOLUTION :N//A
Discussion
18.

Match the lists I and II and pick the correct matching from the codes given below

Answer»

a-2, b-4, c-5, d-1, e-3
a-5,b-4,c-1,d-3,e-2
a-1,b-3,c-4,d-2,e-5
a-4,b-5,c-2,d-1,e-3

Answer :A
Discussion
19.

Match the List with List II and choose the correct option from the codes given below:

Answer»

<P>`{:(,P,Q,R,S),((A),3,4,1,2):}`
`{:(,P,Q,R,S),((B),2,3,1,4):}`
`{:(,P,Q,R,S),((C),3,1,4,2):}`
`{:(,P,Q,R,S),((D),4,3,1,2):}`

ANSWER :D
Discussion
20.

Match the List I with List II and select the correct answer using the codes given below the lists: {:("List - I ","List - II "),("A) Teflon ","i) Ozone layer depletion "),("B) Pyrene ","ii) Non-biodegradable insecticide "),("C) DDT ","iii) Non-stick cookwares and insulator "),("D) Freon ","iv) Fire extinguisher"):}

Answer»

`{:(A,B,C,D),(i,ii,iii,IV):}`
`{:(A,B,C,D),(iv,iii,i,ii):}`
`{:(A,B,C,D),(iii,iv,ii,i):}`
`{:(A,B,C,D),(ii,i,iv,iii):}`

ANSWER :C
Discussion
21.

Match the list-I with list-II and select the correct answer from the given codes: .

Answer»

I-C,II-B,III-D,IV-A
I-B,II-CltIII-D,IV-A
I-A,II-B,III-C,IV-D
I-D,II-A,III-B,IV-C

Answer :A
Discussion
22.

Match the List I with List II and choose the correct option from the codes given below

Answer»

<P>`{:(P,Q,R,S),(3,4,1,2):}`
`{:(P,Q,R,S),(2,3,1,4):}`
`{:(P,Q,R,S),(3,1,4,2):}`
`{:(P,Q,R,S),(4,3,1,2):}`

ANSWER :D
Discussion
23.

Match the List-I with List-II :

Answer»


ANSWER :A::B::C::D
Discussion
24.

Match the List -I (containing anions ) with List -II (containing reagent used in testing ) using the codes as given below in the column. {:("List"-I,,"List"-II),(("anions"),,("reagents")),((a)S^(2-),,(p)"Barium chloride solution in presence of HCl"),((b)NO_(3)^(-),,(q)"Sodium nitroprusside"),((c)I^(-),,(r)"chlorine water and chloroform"),((d)SO_(4)^(2-),,(s)"iron"(II)"sulphate solution and conc."H_(2)SOS_(4)):} Code :

Answer»

`{:(,"(a)","(B)","(c)","(d)"),(,"(q)","(s)","(r)","(p)"):}`
`{:(,"(a)","(b)","(c)","(d)"),(,"(p)","(s)","(r)","(q)"):}`
`{:(,"(a)","(b)","(c)","(d)"),(,"(q)","(p)","(r)","(s)"):}`
`{:(,"(a)","(b)","(c)","(d)"),(,"(p)","(q)","(r)","(s)"):}`

Solution :`(a)""[Fe(CN)_(5)NO]^(2-)+S^(2-)rarr[Fe(CN)_(5)NO]^(4-)("purple colouration")`
`S^(2+)+BaCl_(2)rarr"No precipitate".`
`(b)""2NO_(3)^(-)+4H_(2)SO_(4)+6Fe^(2+)rarr6Fe^(3+)+2NOuarr+4SO_(4)^(2-)+4H_(2)O`
`[Fe(H_(2)O)_(6)]^(2+)+NOrarrunderset(("Brown complex"))([Fe(H_(2)O)_(5)NO]^(2+)+H_(2)O)`
`(c )""2I^(-)+CL_(2)+I_(2)+2Cl^(-)`
`""I_(2)+C CI_(4)rarrI_(2)` dissolves forming a violet solution.
`(d)""Ba^(2+)+SO_(4)^(2-)rarrBaSO_(4)darr("white")`
`HCl`REMOVES the impurities of `S^(2-),I^(-)` and `NO_(3)^(-)` and white precipitate of `BaSO_(4)` is THUS obtained.
Discussion
25.

Match the List I (Colloidal dispersion) withList-II (Nature of dispersion) and select answer in terms of code given below.

Answer»

A-4, B-2, C-1, D-5
A-1, B-5, C-3, D-2
A-4, B-5, C-1, D-2
A-1, B-2, C-3, D-5

Solution :is the CORRECT ANSWER.
Discussion
26.

Match the List-I and List-II correctly using the code given below.

Answer»

`{:("A,B,C,D"),("1,2,3.4"):}`
`{:("A,B,C,D"),("2,3,4,1"):}`
`{:("A,B,C,D"),("3,4,2,1"):}`
`{:("A,B,C,D"),("3,4,2,1"):}`

ANSWER :C
Discussion
27.

Match the list-I and list-II and select the correct answer from the codes given below the lists:

Answer»


SOLUTION :N//A
Discussion
28.

Match the list I and II using the code given below the list . {:(,"List -I",,"List - II"),(A.,t_(1//2)" of first order reaction",1.,k=2.303/tlog.[((A_0))/((A))]),(B.,t_(1//2)"of "n^(th)"order",2.,f=e^(-(E_a)/(RT))),(C.,"Fractionof effective collision",3.,(0.6932)/k),(D.,"Rate constant of first order reaciton",4.,(2^(n-1)-1)/((n-1)k(A_0)^(n-1))):} code

Answer»

`{:(A,B,C,D),(3,4,1,2):}`
`{:(A,B,C,D),(4,2,3,1):}`
`{:(A,B,C,D),(1,3,2,4):}`
`{:(A,B,C,D),(2,1,4,3):}`

ANSWER :a
Discussion
29.

Match the list I and II using the code given below the list {:("List - I","List - II"),("A. "NaCl,"1. Molecular crystal"),("B. "SiO_(2),"2. Metallic crystal"),("C. "C_(6)H_(12)O_(6),"3. Ionic crystal"),("D. Copper","4. Covalent crystal"):}

Answer»

`{:(A,B,C,D),(3,4,1,2):}`
`{:(A,B,C,D),(2,3,4,1):}`
`{:(A,B,C,D),(4,1,2,3):}`
`{:(A,B,C,D),(1,2,3,4):}`

Answer :(a) 3, 4, 1, 2
Discussion
30.

Match the list I and II using the code given below the list . {:(,"List -I",,"List - II"),(A.,2NO+O_2rarr2NO_2,1.,"First order reaction"),(B.,CH_3COOCH_3+H_2Ooverset(H^+)rarrCH_3COOH+CH_3OH,2.,"Zero order reaction"),(C.,""_(92)Uoverset(..)uoverset(..)uoverset(..)urarr_90Th+_2He,3.,"Pseudo first order reaction"),(D.,CH_3COCH_3+I_2rarrICH_2COCH_3+HI,4.,"Third order reaction"):} code

Answer»

`{:(A,B,C,D),(3,2,4,1):}`
`{:(A,B,C,D),(4,3,1,2):}`
`{:(A,B,C,D),(2,1,3,4):}`
`{:(A,B,C,D),(1,4,2,3):}`

ANSWER :b
Discussion
31.

Match the list I and II using the code given below the list . {:(,"List -I",,"List - II"),(A., N_2O(g)hArrN_2(g)+1//2O_2(g),1.,Order =1 ),(B. ,SO_2Cl(g)rarrSO_2(g)+cl_2(g),2.,Order = 4),(C.,CH_3CHO(g)rarrCH_4(g)+CO(g),3.,Order = 0),(D.,5Br_((aq))^(-)+BrO_(3(aq))^(-)+6H^(+)rarr3Br_(2(l))+3H_2O(l),4.,Order =3//2):} code

Answer»

`{:(A,B,C,D),(3,1,4,2):}`
`{:(A,B,C,D),(4,2,3,1):}`
`{:(A,B,C,D),(2,4,1,3):}`
`{:(A,B,C,D),(1,3,2,4):}`

ANSWER :a
Discussion
32.

Match the List -I and II and select the correct answer {:(,"List-I",,"List -II"),(1.,"Cannizzaro's reaction",(A),SnCl_(2)+HCl),(2.,"Srephen's reaction",(B),50% NaOH),(3.,"Clemmenson reduction ",(C),Pd - BaSO_(4)+ "quinoline"),(4.,"Rosenmud's reduction",(D),Zn.Hg+Conc.HCl):}

Answer»

`1 - B, 2 - D, 3 - A, 4-C`
`1-B, 2-C, 3-D, 4-A`
`1 - B,2-A , 3-D, 4-C`
`1 - D, 2-A, 3-C, 4-B`

ANSWER :C
Discussion
33.

Match the list I and II using the code given below the list . {:("List -I","List - II"),("A. Acid hydrolysis of an ester","1. Fractional order reaction"),("B. Decomposition of "H_2O_2,"2. Second order reaction"),("C. Decomposition of "CH_3CHO,"3. Pseudo first order reaction"),("D. Substitution of methyl bromide with aqueous KOH","4. First order reaction"):} Code

Answer»

`{:(A,B,C,D),(3,4,1,2):}`
`{:(A,B,C,D),(4,2,3,1):}`
`{:(A,B,C,D),(1,3,2,4):}`
`{:(A,B,C,D),(2,1,4,3):}`

ANSWER :a
Discussion
34.

Match the list I and II using the code given below the list. {:("List - I","List - II"),("A. Acid hydrolysis of an ester","1. Fractional order reaction"),("B. Decomposition of "H_(2)O_(2),"2. Second order reaction"),("C. Decomposition of "CH_(3)CHO,"3. Pseudo first order reaction"),("D. Substituion of methyl bromide with aqueous KOH.","4. First order reaction"):}

Answer»

`{:(A,B,C,D),(3,4,1,2):}`
`{:(A,B,C,D),(4,2,3,1):}`
`{:(A,B,C,D),(1,3,2,4):}`
`{:(A,B,C,D),(2,1,4,3):}`

Solution :A - 3, B - 4, C - 1, D - 2
Discussion
35.

Match the list I and II using the code given below that list : {:("List - I","List - II"),("A. NaCl","1. Molecular crystal"),("B. "SiO_(2),"2. Metallic crystal"),("C. "C_(6)H_(12)O_(6),"3. Ionic crystal"),("D. Dopper","4. Covalent crystal"):}

Answer»

`{:(A,B,C,D),(3,4,1,2):}`
`{:(A,B,C,D),(2,3,4,1):}`
`{:(A,B,C,D),(4,1,2,3):}`
`{:(A,B,C,D),(1,2,3,4):}`

SOLUTION :A-3, B-4, C-1, D-2
Discussion
36.

Match the List given below:

Answer»

<P>`{:(P,Q,R,S),(1,2,4,3):}`
`{:(P,Q,R,S),(2,1,4,3):}`
`{:(P,Q,R,S),(4,1,3,2):}`
`{:(P,Q,R,S),(4,3,2,1):}`

ANSWER :D
Discussion
37.

Match the List given below:

Answer»

`{:(,P,Q,R,S),((A),1,2,4,3):}`
`{:(,P,Q,R,S),((B),2,1,4,3):}`
`{:(,P,Q,R,S),((C),4,1,3,2):}`
`{:(,P,Q,R,S),((D),4,3,2,1):}`

Answer :D
Discussion
38.

Match the laws given in Column I with expressions given in Column II. {:("Column I","Column II"),("(i) Raoult's law","(a) "DeltaT_(f)=K_(f)m),("(ii) Henry'law","(b) "pi=CRT),("(iii) Elevation of boiling point","(c) "p=x_(1)p_(1)^(@)+x_(2)p_(2)^(@)),("(iv) Depression is freezing point","(d) "DeltaT_(b)=K_(b)m),("(v) Osmotic pressure","(e) "p=K_(H)x):}

Answer»


Answer :`(i) RARR (C), (ii) rarr (e), (iii) rarr (d), (iv) rarr (a), (v) rarr (B)`
Discussion
39.

Match the list -1 with list -II and select the correct answers usingthe code given below the list. (##SUR_CHE_XII_V01_C05_E09_009_Q01.png" width="80%">

Answer»

`{:(1,2,3,4 ),(B,C,d,a):}`
`{:(1,2,3,4 ),(c,b,a,d):}`
`{:(1,2,3,4 ),(c,a,d,b):}`
`{:(1,2,3,4 ),(d,c,b,a):}`

ANSWER :C
Discussion
40.

Match the list-1 with list -II and select the correct answers using the code given below the list: (##SUR_CHE_XII_V01_C05_E09_008_Q01.png" width="80%">

Answer»

`{:(1,2,3,4 ),(d,a,B,C):}`
`{:(1,2,3,4 ),(d,c,b,a):}`
`{:(1,2,3,4 ),(b,c,d,a):}`
`{:(1,2,3,4 ),(b,d,a,c):}`

ANSWER :C
Discussion
41.

Match the laws given in Column - I with express ions given in Column - II{:(,"Column - I",,"Column - II"),((A),"Raoult's law",(1),Delta T_(f)=K_(f).m),((B),"Henry's law",(2),pi=CRT),((C ),"Elevation of boiling point",(3),p=p_(1)^(0)x_(1)+p_(2)^(0)x_(2)),((D),"Depression in freezing point",(4),Delta T_(b)=K_(b).m),((E ),"Osmotic pressure",(5),p=K_(H).x):}

Answer»

SOLUTION :(A - 3), (B - 5), (C - 4), (D - 1), (E - 2)
Discussion
42.

Match the laws given in Column (I) with expressions given in Column (II)

Answer»


Answer :`(a)-(III);(B)-(V);©-(IV);(d)-(i);€-(II)`
Discussion
43.

Match the items of Columns I and II and mark the correct option. {:("Column I","Column II"),((A)"Its partial hydrolysis does not change oxidation state of central atom",(1)He),((B)"It is used in modern diving apparatus",(2)XeF_(6)),((C)"It is used to provide inert atmosphere for filling electrical bulbs",(3)XeF_(4)),((D)"Its central atom is in"sp^(3)d^(2)"hybridisation",(4)Ar):}

Answer»

`{:(A(1),B(4),C(2),D(3)):}`
`{:(A(1),B(2),C(3),D(4)):}`
`{:(A(2),B(1),C(4),D(3)):}`
`{:(A(1),B(3),C(2),D(4)):}`

Answer :C
Discussion
44.

Match the items of Columns I and II and mark the correct option. {:("Column I","Column II"),((A) H_(2)SO_(4),(1)"Highest electron gain enthalpy"),((B)"CCl"_(3)NO_(2),(2)"Chalcogen"),((C)Cl_(2),(3)"Tear gas"),((D)"Sulphur",(4)"Storage batteries"):}

Answer»

`{:(A(4),B(3),C(1),D(2)):}`
`{:(A(3),B(4),C(1),D(2)):}`
`{:(A(4),B(1),C(2),D(3)):}`
`{:(A(2),B(1),C(3),D(4)):}`

Answer :A
Discussion
45.

Matchtheitemsof ColumnIwiththeitemsofColumnIIandassignthecorrectcode: {:(,"Column I",,, "Column II"),((A), "Blistered Cu",,(1), "Aluminium"),((B), "Blastfurnace",,(2),2Cu_2O+Cu_2S to6 Cu +SO_2),((C),"Reverberatoryfurnace",,(3),"Iron"),((D),"Hall - Heroultprocess",,(4), FeO+SiO_2 to FeSiO _ 3), (,,,(5), 2Cu_2S +3O_2 to2Cu_2 O+2SO_ 2 ):}

Answer»

A(5) `"" `B(4) `""`C(3)`""`D(2)
A(1) `"" `B(2) `""`C(3)`""`D(5)
A(5) `"" `B(4) `""`C(3)`""`D(2)
A(4) `"" `B(5) `""`C(3)`""`D(2)

SOLUTION :Explanation. BlisteredCu isformeddue toescapeof` SO_2`duringsolidification. Blastfurnace is usedinthemetallurgyor iron.In reverberatoryfurnace,BASICIMPURITY (FeO) combineswith acidic flux toform` FeSiO_3 `slag. Hall-Heroultprocessisused forextractionofAl.
Discussion
46.

Match the items of Columns-I and II and mark the correct option.

Answer»

A-(1), B-(4), C-(2), D-(3)
A-(1), B-(2), C-(3), D-(4)
A-(1), B-(1), C-(2), D-(4)
A-(1), B-(3), C-(2), D-(4)

Answer :c
Discussion
47.

Match the items of Columns-I and II and mark the correct option.

Answer»

A-(4), B-(3), C-(1), D-(2)
A-(3), B-(4), C-(1), D-(2)
A-(4), B-(1), C-(2), D-(3)
A-(2), B-(1), C-(1), D-(2)

ANSWER :a
Discussion
48.

Matchtheitems ofColumn Iwiththeitems of Column IIandassignthecorrect code:{:(,"Column I",,, "Column II"),((A), "Sapphire",,(1), Al _ 2O _3),((B), "Sphalerite",,(2),NaCN),((C),"Depressant",,(3),Co),((D),"Corundum",,(4), ZnS), (,,,(5), Fe_2O_3):}

Answer»

A(3) `"" `B(4) `""`C(2)`""`D(1)
A(5) `"" `B(4) `""`C(3)`""`D(2)
A(2) `"" `B(3) `""`C(4)`""`D(5)
A(1) `"" `B(2) `""`C(3)`""`D(4)

SOLUTION :EXPLANATION. Thecolourofsapphireis duetoCo. SphaleriteisZnS. Depressantis NaCN. Corundumisactually` Al _ 2 O_ 3`.
Discussion
49.

Matchthe itemsofColumnIwiththeitemsofColumn IIandassignthecorrectcode : {:(, "Column I",,,"Column II"),((A), "Coloured bands",,(1),"Zone refining"), ((B),"Impure metal to volatile complex",,(2), "Fractionaldistillation"), ((C ), "Purification of Ge and Si",,(3), "Mond Process"), ((D), "Purification",,(4), "Chromatography"), (,,,(5), "Liquation"):}

Answer»

A(1) `"" `B(2) `""`C(4)`""`D(5)
A(4) `"" `B(3) `""`C(1)`""`D(2)
A(3) `"" `B(4) `""`C(2)`""`D(1)
A(5) `"" `B(4) `""`C(3)`""`D(2)

Solution :Explanation. Colouredbandsare formedinchromatography. In Mond'sprocess,theimpureNi metalforms avolatile nickeltetracarbonyl,`Ni(CO)_4 `. PurificationofGeand Si is carriedoutbyzone REFINING. Mercurybeingaliquidis purifiedbyfractionaldistillation.
Discussion
50.

Match the items of column I with items of column II. {:("Column I","Column II"),((a)"Antifreeze used in car engine",(I)"Neutral ferric chloride"),((b)"Solvent used in perfumes",(II)"Glycerol"),((c)"Starting meterial for picric acid",(III) "Methanol"),((d)"Wood sprit",(IV)"Phenol"),((e)"Reagent used for detection of phenolic group",(V) "Ethylene glycol"),((f)"By product of soap industry used in cosmetics",(VI)"Ethanol"):}

Answer»


SOLUTION :N//A
Discussion