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.

In the complex [Pt(NH_(3))_(3)Cl][CuCl_(3)(NH_(3)] the charges over [Pt(NH_(3))_(3)Cl]^(+x) and [CuCl_(3)(NH_(3)]^(-y) then (x+y) is

Answer»


Solution :`[PT(NH_(3))_(3)CL]^(+1)` and `[CuCl_(3)(NH_(3))]^(-1)`
`1 + 1 = 2`
Discussion
2.

In the following reaction : X is …….

Answer»




ANSWER :C
Discussion
3.

In the complexes [Fe(H_2O)_6]^(3+) , [Fe(CN)_6]^(3-), [Fe(C_2O_4)_3]^(3-) and [FeCl_6]^(3-) , more stability is shown by

Answer»

`[Fe(H_2O)_6]^(3+)`
`[Fe(CN)_6]^(3-)`
`[Fe(C_2O_4)^3 ]^(3-)`
`[FeCl_6]^(3-)`

Answer :C
Discussion
4.

In the following reaction, X and Y respectively areC_(2)H_(5)OH overset(KMnO_(4)//H^(+))to X overset(Y)to CH_(3)CO_(2)C_(2)H_(5)

Answer»

`CH_(3)OH,C_(2)H_(5)OH`
`CH_(3)CHO,CH_(3)OH`
`CH_(3)CO_(2)H,C_(2)H_(5)OH`
`C_(2)H_(4),CH_(3)CO_(2)H`

SOLUTION :`underset("Ethanol")(C_(2)H_(5)OH)underset(H^(+))overset(KMnO_(4))tounderset("Aceticacid")(CH_(3)COOH)overset(C_(2)H_(5)OH)to underset("Ethylacetate")(CH_(3)COOC_(2)H_(5))`
Discussion
5.

In the complex PtCl_(4). 4NH_(3), the number of ionisable chlorine ions is :

Answer»

FOUR
ONE
TWO
three.

Answer :C
Discussion
6.

In the following reaction X and Y respectively are respectively are X overset(Aq. NaOH)to CH_3COOH overset(Y)to (CH_3 CO)_2 O

Answer»

`CH_(3) . CHO , PCl_(5)`
`CH_(3) CN, P_(2) O_(5)`
`CH_(3) CH_(2) OH , NAOAC`
`CH_(3) CO CH_(3) , H_(2) SO_(4)`

Answer :B
Discussion
7.

In the complex [Ni(H_2O)_2 (NH_3)_4]^(2+)the number of unpaired electrons is

Answer»

0
1
3
2

Answer :D
Discussion
8.

In the complex K_(2)Fe[Fe(CN)_(6)]:

Answer»

both Fe atoms are in the same OXIDATION STATE
Both Fe atoms are in different oxidation state
the coordination number of ION is 4
the complex is a high SPIN complex

Answer :A
Discussion
9.

In the complex , K_4[Ni(CN)_4] , what is the oxidation state of nickel ?

Answer»

SOLUTION :`K_4[NI(CN)_4]`
X + 4(-1) = -4
x = -4 +4 = zero
Discussion
10.

In the following reaction, X and Y are respectively. CH_(3)COOH+NH_(3)toXoverset(Delta)toY+H_(2)O

Answer»

`CH_(3) CONH_(2) , CH_(4)`
`CH_(3) COONH_(4) , CH_(3) CONH_(2)`
`CH_(3) CONH_(2) , CH_(3) COOH`
`CH_(3) NH_(2) , CH_(3) CONH_(2)`

Answer :B
Discussion
11.

In the following reaction, which is the species being oxidized? 2Fe^(3+) ""_((aq)) +2I^(-) ""_((aq)) +2Fe_((aq))^(2+)

Answer»

`Fe^(3+)`
`I^(-)`
`I_(2)`
`Fe^(2+)`

SOLUTION :`2 OVERSET(3+) Fe_((AQ))+2I_((aq))^(-)tp UNDERSET(0 ) (I_(2 (aq)) +2 overset(+2) 2Fe_((aq))`
hereO.Nof Iincreasesfrom-Iin `I^(-)` to 0`O_2`THEREFORE`I^(-)` ionsare oxidizedto `I_2`
Discussion
12.

In the following reaction, which of the following steps is wrong ?

Answer»

STEP 1
Step 2
Step 3
None

ANSWER :B
Discussion
13.

In the complex Fe (CO)_X, the value of x is:

Answer»

3
4
5
6

Answer :C
Discussion
14.

In the following reaction, which is the species being oxidised ?2Fe^(3+) (aq) + 2I^(-) (aq) rarr I_2 (aq) + 2Fe^(2+) (aq)

Answer»

`Fe^(3+)`
`I^(-)`
`I_(2)`
`Fe^(2+)`

Solution :B) O.N. of `I^(-)` is -I and in `I_2`, O.N. is zero (LOSS ofelectrons). HENCE `l^(-)` oxidised.
Discussion
15.

In the complex [CoCl_(2)(en)_(2)] Br, the co-ordination number and oxidation state of cobalt are :

Answer»

6 and `+3`
3 and `+3`
4 and `+2`
6 and `+1`

Answer :A
Discussion
16.

In the complex [Co(NH_(3))_(5)Cl]Cl_(2), the co-ordination sphere is :

Answer»

`CO^(3+)`
`2CL^(-)`
`(NH_(3))_(5)CL`
`[Co(NH_(3))_(5)Cl]^(2+)`

Answer :D
Discussion
17.

In the following reaction we start with 2 mol of N_(2) and 5 of H_(2)exerting a total pressure of 7 atm at a given temperature in a closed vessel when 50% of N_(2) is converted into NH_(3), N_(2) + 3H_(2) to 2NH_(3) What will be the partial pressure of NH_(3) in atmosphere ?

Answer»


SOLUTION :N/A
Discussion
18.

In the complex, basic beryllium acetate [Be_(4)O(CH_(3)COO)_(6)] it is known that 'overset(**)O' is acting as bridge for all 4 beryllium and (CH_(3)COO-) as a bridiging ligand for any two berylliums, in pairs. Now, answer the following questions : Identify the ligand which is ambidentate and has three different donor sites available :

Answer»

`NCS^(-)`
`NOS^(-)`
`CNO^(-)`
all of these

ANSWER :B
Discussion
19.

In the following reactionwhat is A ? (CH_(3))_(3)C - NH_(2) +3[O] overset(Delta)(to) ( CH_(3))_(3) C-NO_(2) + H_(2) O

Answer»

`KOH`
`KNO_(2)`
`KMnO_(2)`
`KNO_(2)`

Solution :`KMnO_(4) `is OXIDISINGAGENT .
`(CH_(3))_(3) C - NH_(2)+ 3 [O]OVERSET( KMnO_(4)) (to)(CH_(3)) _(3)CNO_(2) +H_(2) O`
Discussion
20.

In the complex, basic beryllium acetate [Be_(4)O(CH_(3)COO)_(6)] it is known that 'overset(**)O' is acting as bridge for all 4 beryllium and (CH_(3)COO-) as a bridiging ligand for any two berylliums, in pairs. Now, answer the following questions : Choose the correct set of hybridisation for Be" and "overset(**)O in the complex :

Answer»

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

ANSWER :B
Discussion
21.

In the following reaction, trace the position of isotopic O^(18) CH_(3)-overset(O)overset(||)C-O-H+CH_(3)CH_(2)-overset(18)O-HhArrCH_(3)-overset(O)overset(||)C-O-CH_(2)CH_(3)+H_(2)O

Answer»


ANSWER :`overset(18)O "is in ester" CH_(3)overset(O)overset(||)COCH_(2)CH_(3)`
Discussion
22.

In the complex, basic beryllium acetate [Be_(4)O(CH_(3)COO)_(6)] it is known that 'overset(**)O' is acting as bridge for all 4 beryllium and (CH_(3)COO-) as a bridiging ligand for any two berylliums, in pairs. Now, answer the following questions : Number of Be-O-Be bond angles in the complex =x Number of O-Be-O bond angles in the complex=y Find the value of (y)/(x)

Answer»

5
4
6
3

Solution :x=6,y=24
Discussion
23.

In the following reaction, three product a, b, c are obtained. H_(3)C-overset(CH_(3))overset("|")underset(CH_(3))underset("|")"C "-underset(OH)underset("|")"CH"-CH_(3)overset(H_(3)PO_(4)"/heat")rarr underset("(a)")(H_(3)-C-overset(CH_(2))overset("|")underset(CH_(3))underset("|")"C "-CH)=CH_(2)+ +H_(3)C-underset("(c)")(overset(CH_(2))overset("||")C-underset(CH_(2))underset("|")"CH"-CH_(3))

Answer»

`(a) 33%, (B) 64%, (C) 3%`
`(a) 3%, (b) 64%, (c) 33%`
`(a) 3%, (b) 33%, (c) 64%`
`(a) 64%, (b) 3%, (c) 33%`

Answer :B
Discussion
24.

In the complex acetyl bromidodicarbonyl bis(triethyl phospine) iron (II), the numer of Fe-C bond (s) is

Answer»

<BR>

Solution :The GIVEN complex is
`[Fe(CH_(3)CO)(Br)(CO)_(2)(PEt_(3))_(2)]`. Its STRUCTURE is

Thus, it has two Fe-CO bonds and one
`Fe larr overset(O)overset(||)(C )-CH_(3)` bond.
Total number of Fe-C bonds = 3
Discussion
25.

In the following reaction, The structure of the major product X is

Answer»




SOLUTION :Substitution occurs in the ring `p` to electron donating `NH` group. THUS OPTION (B) is correct.
Discussion
26.

In the complete combustion of butanol C_(4)H_(9)OH(l), if DeltaH is enthalpy of combustion and DeltaE is the heat of combustion at constant volume, then

Answer»

`DELTAH LT DeltaE`
`DeltaH = DeltaE`
`DeltaH GT DeltaE`
`DeltaH, DeltaE` RELATION cannot be predicted

Solution :In the COMPLETE combustion of butanol `DeltaHgtDeltaE`.
Discussion
27.

In the complete combustion of C_n H_(2n+2) the number of oxygen moles required is :

Answer»

`n/2O_2`
`((n+1)/2)O_2`
`((3n+1)/2)O_2`
`((n+2)/2)O_2`

ANSWER :C
Discussion
28.

In the following reaction , . the structure of the major product (X ) is :

Answer»

` (##KSV_CHM_ORG_P2_C15_E01_154_O01.png" width="30%">
` (##KSV_CHM_ORG_P2_C15_E01_154_O02.png" width="30%">

SOLUTION :
Ring `1` is more active , electrophilic subsititution TAKES place over ring 1. `-NH-UNDERSET(O)underset(||)(C)-Ph` is ortho-para directing , para-product is rpeduminating .
Discussion
29.

In the commercial manufacture of nitric acid, howmany moles of NO_(2) produce 7.33 mol of HNO_(3) in the reaction : 3NO_(2)(g)+H_(2)O(l) rarr 2HNO_(3)(aq)+NO(g)?

Answer»


Solution :2 MOLES of `HNO_(3)` are produced from 3 moles of `NO_(2)`. Hence, 7.33 moles of `HNO_(3)` will be produced from
`NO_(2)=(3)/(2)xx7.33=10.995" moles."`
Discussion
30.

In the following reaction, the product(s) formed is (are) :

Answer»

P(major)
Q(MINOR)
R(minor)
S(major)

SOLUTION :It is Reminer Tiemann reaction and PROCEEDS as follows :

Discussion
31.

In the commercial manufacture of ethyl alcohol from starchy substances by fermentation method, which enzymes stepwise complete the fermentation reaction

Answer»

Diastase, MALTASE , and zymase
Maltase, zymase and invertase
Diastase, zymase and lactase
Diastase , invertase and zymase

Solution :`2underset("STARCH")((C_(6)H_(10)O_(5))_(n))+nH_(2)O underset("(from GERMINATED barley)")overset("Diastase")to underset("Maltose")((C_(12)H_(22)O_(11)))`
`C_(12)H_(22)O_(11)+ H_(2)O underset("(from yeast)")overset("Maltase")to 2 underset("Glucose")(C_(6)H_(12)O_(6))`
`C_(6)H_(12)O_(6)underset("(from yeast)")overset("Zymase")to 2C_(2)H_(5)OH + 2CO_(2)`
Discussion
32.

In the following reaction, the product E is {:(,CHO),(,"|"),(,CHO):}underset(2.H^(+))overset(1.NaOH)toE

Answer»

`{:(,CH_(2)OH),(,"|"),(,CHO):}`
`{:(,CHO),(,"|"),(,CO_(2)H):}`
`{:(,CH_(2)OH),(,"|"),(,CO_(2)H):}`
`{:(,CH_(2)H),(,"|"),(,CO_(2)H):}`

Solution :`{:(,CHO),(,"|"),(,CHO):} overset(1.NaOH)to {:(,CH_(3)OH),(,"|"),(,COONA):} overset(2.H^(+))to {:(,CH_(2)OH),(,"|"),(,COOH):}`
Discussion
33.

In the commercial gasolines, the type of hydrocarbons which are more desirable is

Answer»

Branched hydrocarbon
Straight-chain hydrocarbon
Linear unsaturated hydrocarbon
Toluene

Solution :Branched hydrocarbons are more DESIRABLE because they are more volatile and have HIGH OCTANE NUMBER.
Discussion
34.

In the commercial electrochemical process for aluminium extraction the electrolyte used is

Answer»

`Al(OH)_(3)` in NaOH SOLUTION
An aqueous solution of `Al_(2)(SO_(4))_(3)`
A molten mixture of `Al_(2)O_(3) and Na_(3)AlF_(6)`
A molten mixture of `Al_(2)O_(3) and Al(OH)_(3)`

Answer :C
Discussion
35.

In the following reaction, the product 'R' is: CaC_(2) overset(H_(2)O)to P overset("hot iron")underset("tube")to Q overset(CH_(3)Cl)underset(AlCl_(3))toR

Answer»

Benzene
Ethylbenzene
Toluene
n-propylbenzene

Solution :
Discussion
36.

In the commercial electrochemical process for aluminium extraction, the electrolyte used as

Answer»

`AI(OH)_(3)` in NaOH solution
a aqueous solution of `Al_(2)(SO_(4))_(3)`
a molten mixtruer of `Al_(2)O_(3) and Na_(3) AIF_(6)`
a molten mixture of AIO(OH) and `AI(OH)_(3)`

ANSWER :C
Discussion
37.

In the following reaction, the product E is underset(CHO)overset(CHO)(|) underset(2. H^(+))overset(1. NaOH)to E

Answer»

`underset(CHO)overset(CH_(2)OH)(|)`
`underset(CO_(2)H)overset(CHO)(|)`
`underset(CO_(2)H)overset(CH_(2)OH)(|)`
`underset(CO_(2)H)overset(CO_(2)H)(|)`

Solution :This is intramolecular Cannizzaro reaction.
Discussion
38.

In the combustion of methane, what is the limiting reactant and why?

Answer»

Solution :Methane is the LIMITING reactant because the other reactant is OXYGEN of the AIR which is always PRESENT in excess. Thus, the amounts of `CO_(2)` and `H_(2)O` formed will depend UPON the amount of `CH_(4)` burnt.
Discussion
39.

In the following reaction, the product (A)

Answer»




ANSWER :D
Discussion
40.

In the colloidal state the particle size ranges

Answer»

below 1 nm
between 1 nm to 1000 nm
more than 100 nm
none of the above

Answer :B
Discussion
41.

In the following reaction The organic product X is

Answer»




SOLUTION :
Discussion
42.

In the following reaction, the number of substituted alcohols is: .

Answer»

Solution :
The reaction proceeds by `S_(N^(1))` mechanism and the three CARBOCATION intermediates are possible in the SLOW step.
Therefore, three substituted alcohols are FORMED.
Discussion
43.

In the combustion of hydrocarbons, triangleH is:

Answer»

Negative
Zero
Positive
Undeterminate

Answer :A
Discussion
44.

In the combustion of 2.0 gm of methane 25 kcal heat is liberated, heat of combustion of methane would be

Answer»

100 kcal
200 kcal
300 kcal
400 kcal

Solution :`CH_(4)+2O_(2)rarrCO_(2)+2H_(2)O`
Molecular weight of `CH_(4)=12+4=16`
`therefore` On the COMBUSTION of 2.0 gm of methane = 25.0 kcal
`therefore` On the combustion of 16.0 gm = `(25xx16)/(2)` = 200 kcal.
Discussion
45.

In the following reaction, the major product (thermodynamically stable) is

Answer»

`BrCH_2CH(CH_3)CH = CH_2`<BR>`CH_3C(Br)(CH_3)CH= CH_2`
`CH_2 = C(CH_3)CH(Br) CH_3`
`(CH_3)_2C = CH-CH_2Br`

ANSWER :D
Discussion
46.

In the following reaction , the initial concentration of the reactant and initial rate at 298 K are given 2 A to C + D {:([A]_(0) "mol" L^(-1) ,, "Initial rate in mol" L^(-1) s^(-1)), (0.01 ,, 5. 0 xx 10^(-5)), (0.02 ,, 2xx 10^(-4)):} The value of rate constant of this reaction at 298 K is

Answer»

`0.01 s^(-1)`
`5 XX 10^(-3) mol L^(-1) s^(-1)`
`2.0 xx 10^(-2) mol^(-1) L s^(-1)`
`5 xx 10^(-1) mol^(-1) L s^(-1)`

SOLUTION :Let the order with RESPECT to A is `ALPHA` .
RATE = k `[A]^(alpha)`
`5 xx 10^(-5) = k[0.01]^(alpha) "" … (i)`
`2 xx 10^(-4) = k[0.02]^(alpha) ""… (ii)`
By dividing eqn. (ii) by (i) ,
`(2xx 10^(-4))/(5 xx 10^(-5)) = (k[0.02]^(alpha))/(k[0.01]^(alpha))implies 4 (2)^(alpha)` i.e., `alpha = 2`
Substituting the values of `alpha` in eq. (i) ,
`5 xx 10^(-5) = k[0.1]^(2) implies k = (5 xx 10^(-5))/(10^(-4)) = 5 xx 10^(-1) mol^(-1) L s^(-1)`
Discussion
47.

In the coagulation of a positive sol, flocculation powers of CI^- , SO_4^(-2)and PO_4^(-3)are in the order

Answer»

`CL^(-) gt SO_4^(-2) gt PO_4^(-3)`
`Cl^(-) gt PO_4^(-3) gt SO_4^(-2)`
`PO_4^(-3) gt SO_4^(-2) gt Cl^(-)`
`PO_4^(-3) gt Cl^(-) gt SO_4^(-2)`

ANSWER :C
Discussion
48.

In the following reaction, the major product formed will be …… CH_(3)-overset(CH_(3))overset("|")underset("Cl ")underset("|")("C ")-CH=CH_(2)+KSH overset(DMSO)rarr (P)

Answer»

`CH_(3)-overset(CH_(3))overset("|")underset("SH ")underset("|")("C ")-CH=CH_(2)`
`CH_(3)-overset(CH_(2))overset("||")("C ")-CH=CH_(2)`
`CH_(3)-overset(CH_(3))overset("|")("C ")=CH-CH_(2)-SH`
None of these

Solution :The allylic carbon is sterically hindered and THUS the reaction takes PLACE by the rearrangment of the double bond.
Discussion
49.

In the coagulating of a positive sol, flocculation powers of Cl^(-), SO_(4)^(-2) and PO_(4)^(-3) are in the order

Answer»

`ClgtSO_(4)^(-2)gtPO_(4)^(-3)`
`ClgtPO_(4)^(-3)gtSO_(4)^(-2)`
`PO_(4)^(-3)gtSO_(4)^(-2)gtCl`
`PO_(4)^(-3)gtClgtSO_(4)^(-2)`

Answer :C
Discussion
50.

In the following reaction, the final product can be prepared by two paths (I) and (II). Which of the following statements is correct?

Answer»

PATH (I) is feasible
Path (II) is feasible
Both PATHS are feasible
Neither of the TWO paths is feasible

Answer :A
Discussion