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.

K_(4)[Fe(CN)_(6)] is not used for the detection of

Answer»

`Fe^(2+)` IONS
`Zn^(2+)` ions
`Cu^(2+)` ions
`Fe^(3+)` ions

Solution :`Cu^(+2)+[Fe(CN)_(6)]^(4-)rarrunderset("REDDISH brown")(Cu_(2)[Fe(CN)_(6)]darr)`
`4Fe^(3+)+3[Fe(CN)_(6)]^(4-)RARR UNDERSET("blue")(Fe_(4)[Fe(CN)_(6)]_(3)darr)`
`Zn^(2+)+[Fe(CN)_(6)]^(4-)rarr underset("bluish white ppt")(Zn_(2)[Fe(CN)_(6)darr)`
Discussion
2.

...........is used as antitumor drug in cancer treatment

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ANSWER :Cis-Platin
Discussion
3.

……….is usedas a drying agent.

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SOLUTION :SULPHURIC ACID
Discussion
4.

K_4[Fe(CN)_6] is a

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DOUBLE salt
complex compound
neutral molecule
none of these

Answer :B
Discussion
5.

............is used as a chelating ligand for the separation of lanthanides, in sofetning of hard water and also in removing.............poisoning.

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ANSWER :EDTA, LEAD
Discussion
6.

Is there any coloured oxide of hitrogen ?

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Solution :The known OXIDES of N are `N_(2)O`,NO,`NO_(2)`,`N_(2)O_(3)`,`N_(2)O_(3)`,`N_(2)O_(4)`,and `N_(2)O_(5)`.Amongs these `NO_(2)`is brown gas and `N_(2)O_(3)` is blue colour LIQUID
Discussion
7.

………..is thestoragepolysaccharides of animals .

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SOLUTION :GLYCOGEN
Discussion
8.

K_(4)[Fe(CN)_(6)] can beusedto detectoneormoreout of Fe^(2+),Fe^(3+),Zn^(2+),Cu^(2+),Cd^(2+)

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`Fe^(2+),Fe^(3+)`
`Fe^(3+),ZN^(+),Cu^(2+)`
all but `Fe^(2+)`
all but `Fe^(2+)`

Answer :d
Discussion
9.

K_4[Fe(CN)_6] can be used to detect one or more out of Fe^(2+),Fe^(3+),Zn^(2+),Ca^(2+):

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`Fe^(2+),Fe^(3+)` only
`Fe^(3+), Zn^(2+), Cu^(2+)` only
All but not `Ca^(2+)`
All

Solution :`Fe^(2+)+2K^(+)[Fe(CN)_6]darr` (white) (in absence of air)
`Fe^(3+)+[Fe(CN)_6]^(4-)toFe_4[Fe(CN)_6]_3`(PRUSSIAN blue PRECIPITATE or solution)
`Zn^(2+)+2K^(+)[Fe(CN)_6]^(4-)`(excess)`toK_2Zn_3[Fe(CN)_6]_2darr`(bluish -white/white)
`Ca^(2+)+2K^(+)[Fe(CN)_6]^(4-)toK_2Ca[Fe(CN)_6]darr`(white)
`Cu^(+)+2K^(+)+[Fe(CN)_6]^(4-)toCu_2[Fe(CN)_6]darr` [CHOCOLATE brown]
Discussion
10.

Is the reaction, 2Al +3Fe^(2+)rarr2Al^(3+) +3Fe possible?

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No , because STANDARD oxidation POTENTIAL of `AIltFe`
Yes, because standard oxidation potential of `AIgtFe`
NITHER (a) nor(B)
Data are unpredictable

Answer :B
Discussion
11.

K_4Fe(CN)_6 is a :

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DOUBLE salt
Basic salt
Complex compound
Simple salt

Answer :C
Discussion
12.

……………….is the principle gas of atmosphere

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SOLUTION :NITROGEN
Discussion
13.

K_(4)[Fe(CN)_(6)] can be used to detect

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`Fe^(+2)`
`Fe^(+3)`
`ZN^(+2)`
`CU^(+2)`

SOLUTION :`Fe^(+2), Fe^(+3), Zn^(+2), Cu^(+2)`
Discussion
14.

K_4 [Fe(CN)_6] can be used to detect one or more out of Fe^(2+), Fe^(3+), Zn^(2+), Cu^(2+), Cd^(2+)

Answer»

`Fe^(2+),Fe^(3+)`
`Fe^(3+),Zn^(2+),CU^(2+)`
All but `Fe^(3+)`
All but `Fe^(2+)`

Solution :`2ZnCl_(2) +K_(4)[Fe(CN)_(6)] overset(CH_(3)CO OH)to UNDERSET("(Prussian blue)")underset("Ferric ferrocyanide")(Fe_(4)[Fe(CN)_(6)]_(3)+12KCl`
`2Cu(NO_(3))_(2) + K_(4)[Fe(CN)_(6)] to underset("(Reddish brown)")(Cu_(2)[Fe(CN)_(6)])+4KNO_(3)`
`2CD(NO_(3))_(2)+K_(4)[Fe(CN)_(6)] to underset("(BLUISH white)")(Cd_(2)[Fe(CN)_(6)])+4KNO_(3)`
Discussion
15.

Is the name potassium tris(oxalato) aluminium(III) for the complex [K_(3)Al(C_(2)O_(4))_(3)] correct?

Answer»

SOLUTION :No, it is wrong. The correct name of the complex is : POTASSIUM trioxalatoaluminate (III).
Discussion
16.

K_3[Fe(CN)_6] is used in the detection of Fe^(2+) ion with which is gives a deep blue colour. This colour is due to the formation of

Answer»

`K_2Fe(FE(CN)_6]`
`Fe_4[Fe(CN)_6]_3`
`Fe[Fe(CN)_6]`
`Fe_3[Fe(CN)_6]_2`

Solution :`Fe^(+2) + K_3 [Fe(CN)_6] RARR Fe_3 [Fe(CN)_6]_2`
Discussion
17.

……….is the most abundant metal.

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SOLUTION :ALUMINIUM
Discussion
18.

Is the law of constant composition true for all types of compounds ? Explain why or not.

Answer»

Solution :No, law of constnt COMPOSITION is not true for all TYPES of compounds. It is true only for the compounds obtained from one isotope. For example. For example, CARBON exists in two common isotopes, `.^(12)C and .^(14)C`. When it forms `CO_(2)` from `.^(12)C`, the ratio of masses is `12:32=3:8` but from `.^(14)C`, the ratio will be `14:32=7:16` which is not same as in the first case.
Discussion
19.

Is the following sugar, D- sugar or L-sugar?

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SOLUTION :
Discussion
20.

Is thefollowingsugar , D - sugar orL - sugar ?

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SOLUTION :
Discussion
21.

K_3[Co(NO_2)_6] is :

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FISCHER's salt
Thenard's blue
Rinman's green
Blue vitriol

Answer :A
Discussion
22.

K_(3)CoF_(6) is a high spin complex. The state of hybridisation of Co in this complex is

Answer»

`d^(2)SP^(3)`
`sp^(3)`
`sp^(3)d`
`sp^(3)d^(2)`

ANSWER :D
Discussion
23.

K_3[CoF_6] is high spin complex. What is the hybrid state of Co atom in this complex?

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`sp^3d`
`sp^3d^2`
`d^2sp^3`
`dsp^2`

ANSWER :B
Discussion
24.

K_3[CoF_6] is high spin complex. What is the hybrid state of Co atom in this complex:

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`sp^3d`
`sp^3d^2`
`d_2sp_3`
`dsp_2`

ANSWER :B
Discussion
25.

Is the conductivity of ionic solids due to the presence of ions ?

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ANSWER :No, it is DUE to MOBILITY of IONS.
Discussion
26.

_____is the alkane having negative octane number.

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N-hexane
n-heptane
n-octane
n-butane

Answer :n- NONANE
Discussion
27.

K_3[A1(C_2O_4)_3] is called:

Answer»

POTASSIUM alumino oxalate
Potassium alumino (III) oxalat
Potassium trioxalato ALUMINATE
Potassium trioxalato aluminate (III)

ANSWER :D
Discussion
28.

is subjected to hydroboration oxidation of the resulting structure is

Answer»

CIS
trans
meso
mixture of 1 and 2

Answer :B
Discussion
29.

K_(3) Co(NO_(2))_(6) is known as

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Fischer's SALT
Thevard's blue
Rinmann's GREEN
Blue vitriol.

Solution :`K_3 [CO (NO_(2))_(6)]` is known as Fischer.s salt.
Discussion
30.

is subjected to E_(1) reaction, the expeceted product is:

Answer»




SOLUTION :
Discussion
31.

If S_1 be the specific charge of cathode rays and S_2 be that of positive rays then

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`S_1 GT S_2`
`S_1 = S_2`
`S_1 LT S_2`
NEITHER of these

Answer :A
Discussion
32.

K_(2)SO_(4) solution mixed with Cr_(2)(SO_(4))_(3) solution in 1:1 molar ratio gives the test of Cr^(3+) ion but CuSO_(4) solution mixed with aqueous ammonia in 1:4 molar ratio does not give the test of Cu^(2+) ion. Explain why ?

Answer»

Solution :`K_(2)SO_(4).Cr_(2)(SO_(4))_(3) overset(aq)iff2K^(+)(aq)+2Cr^(3+)(aq)+4SO_(4)^(2-)`
So chrome alum is double SALT. It when dissolved in water gives its constituent IONS. Hence it gives the test of `K^(+),Cr^(3+) and SO_(4)^(2-)` ions.
`CuSO_(4).4NH_(3)[CU(NH_(3))_(4)SO_(4) overset(aq)iff[Cu(NH_(3))_(4)]^(2+)(aq)+SO_(4)^(2-)(aq)`
As copper (II) is present in coordination SPHERE it will not given the test of `Cu^(2+)` ion.
Discussion
33.

Is ranitidine an antacid or antihistamine? Can it be used for both purposes ?

Answer»

Solution :Ranitidine is an ANTIHISTAMINE. Ranitidine can ALSO be used as an ANTACID because of the PRESENCE of -NH- group in its molecule.
Discussion
34.

K_2SO_4 . Al_2 (SO_4)_3. 24 H_2O is

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a COMPLEX salt
a DOUBLE salt
a complex salt & double salt
a BASIC salt

Answer :B
Discussion
35.

………….is richin mushroom,avocada, egg yolk , sunflower oil.

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SOLUTION :VITAMIN B2
Discussion
36.

K_(2)[PtCl_(6)] is ionized to three ions when dissolved in water . Will it give white precipitate with AgNO_(3) solution ?

Answer»

SOLUTION :No, because all `Cl^(-)` are in coordination sphere and are non-ionizable.
`K_(2)[PtCl_(6)] iff 2K^(+) +[PtCl_(6)]^(2-)`
Discussion
37.

K_(2)PtCl_(6) is a well known compound whereas corresponding Ni compound is not known. State a reason for it.

Answer»

SOLUTION :This is because `PT^(4+)` is more stablethan `Ni^(4+)` as the sum of FOUR IONIZATION enthalpied of Pt is less than that of Ni.
Discussion
38.

K_(2)[Ni(CN)_(4)] underset(NH_(3))overset("K in liq.")to"X' Regarding this reaction correct statement is/are:

Answer»

X' is `K_(4)[NI(CN)_(4)]`
The oxidation STATE of Ni CHANGED +2 to zero
The STRUCTURE of 'X' is tetrahedral
`[Ni(CN)_(4)]^(2-)` is square planar complex

Answer :A::B::C::D
Discussion
39.

……………..isproduced during digestion of starch by the enzyme alpha -amylase

Answer»

SOLUTION :MALTOSE
Discussion
40.

K_2MaO_4 is formed when :

Answer»

`Cl_2` is passed into `KMnO_4` solution
Manganese dioxide is fused with POTASSIUM HYDROXIDE in AIR
Fonnaldehyde reacts with potassium pennanaganate in PRESENCE of a strong alkali
Potassium pennanaganate reacts with conc `H_2SO_4`

Solution :`MnO_2 + K_2CO_3+ "air" overset(Delta) rarr K_2MnO_4`
Discussion
41.

……………….is produced by passing chlorine gas through dry slaked lime.

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SOLUTION :BLEACHING POWDER
Discussion
42.

K_(2)HgI_(4) is 50% ionised in aqueous solution. Which of following are correct ?

Answer»

n = 7
n = 3
i = 2
i = 4

Solution :EXPLANATION : `K_(2)HgI_(4)RARR 2K^(+)+HgI_(4)^(2-)rArr n=3`
`alpha=(i-1)/(n-1),0.5=(i-1)/(3-1)rArr i=2`
`therefore` (b) and (c ) are correct while (a) and (d) are not correct.
Discussion
43.

Is PH of solution changed in Kolbe's electolysis.

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SOLUTION :The concentration of `NAOH` solution increased so `PH` of solution is increased with TIME.
Discussion
44.

K_(2)Hgl_(4) is 50% ionized in aqueous solution. Which of the following are correct ?

Answer»

n=7
n=3
i=2
i=4

Answer :B::C
Discussion
45.

................is obtained when yellow phosphorus is heated with an aqueous solution of NaOH in an inert atmosphere.

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SOLUTION :`PH_(3)`
Discussion
46.

K_2[Hgl_4]detects the ion group

Answer»

`NH_2`
NO
`NH_4^+`
`CL^-`

ANSWER :C
Discussion
47.

...............is obtained by polymerization of .................and is used for making non -stick utensils.

Answer»


ANSWER :TEFLON,TETRAFLUOROETHENE
Discussion
48.

K_(2)CrO_(4) is____________in colour but K_(2)Cr_(2)O_(7) is______________.

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SOLUTION :YELLOW, ORANGE
Discussion
49.

K_(2)Cr_(2)O_(7) react with hydrazins to form product. The oxidation state of Cr in the product will be :-

Answer»

`+4`
`+3`
`+5`
`+2`

Answer :B
Discussion
50.

K_2Cr_2O_7is NOT used in ____________.

Answer»

dyeing
ESTIMATION of FERROUS ions
detection of CHLORIDE ION
estimation of FERRIC ions

Answer :D
Discussion