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.

During the preparation of Agl sol, the excess of AgNO_(3), is added to potassium iodide. The particles of the sol will acquire:

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POSITIVE CHARGE
NEGATIVE charge
no charge
unpredictable.

Answer :B
Discussion
2.

Draw the structure of the following molecules/ions POCl_(3)

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Discussion
3.

During the polymerisation of caprolactum to get nylon-6 polymer, the temperature range is of about

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533 K to 543 K
473 K to 523 K
533 K to 573 K
273 K to 373 K

Solution :533 K to 543 K
Discussion
4.

Draw the structure of the following molecules/ions PCl_(5)

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Discussion
5.

Draw the structure of the following molecules/ions PCl_(4)^(+)

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Discussion
6.

During the polymerization of ethylene hybridization of 'C' changes from ___ to ____

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

ANSWER :B
Discussion
7.

During the particular reaction 10% of the reactant decomposes in one hour, 20% in two hours, 30% in three hours and so on. The unit of the rate constant is

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`"HOUR"^(-1)`
`L MOL^(-1) "hour"^(-1)`
` mol L^(-1) "hour"^(-1)`
` mol"hour"^(-1)`

Answer :C
Discussion
8.

Draw the structure of the following molecules/ions OF_(2)

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Discussion
9.

During the operation of a cell with the cell reactionMn(OH)_2 +H_2O_2to MnO_2 + 2H_2Ofor 45 seconds, 0.136 g of MnO_2was produced. Calculate the average electric current produced by the cell.

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SOLUTION :6.7 AMP
Discussion
10.

Draw the structure of the following molecules/ions PCl_(3)

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Discussion
11.

During the nuclear explosion,one of the products ""^(90)Sr was absorbed in the bones of a newly born baby in place of ca .How much time in years is required to reduce it by 90% if it is not lost metabolically? (t_((1)/(2))=6.93 years)

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Solution :It TAKES 23.03 YEARS
All nuclear REACTION follow FIRST order reaction and so,
`t_((1)/(2))=(0.693)/(lambda)` [where `lambda`=0.1 (`"year"`^(-1))]
`t=(2.303)/(lambda)` log `((90)/(at))`
`t=(2.303)/(0.1)` log `((90)/(0.190))`
On simplifying above reactionwe get t=23.03 years
Discussion
12.

Draw the structure of the following molecules/ions O Cl_(2)

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Discussion
13.

During the nitration of benzene, nitric acid is used in the presence of conc. Sulphuric acid. The sulphuric acid is used :

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as dehydrating agent
as solvent
to generate nitronium ion
as sulphonating agent

ANSWER :C
Discussion
14.

Draw the structure of the following molecules/ions NO_(3)^(-)

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Discussion
15.

Draw the structure of the following molecules/ions NO_(2)^(-)

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Discussion
16.

During the melting of solid, which of the following is true

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`DeltaS=-ve`
`DeltaH=+ve`
`DeltaS=0`
`DeltaH=-ve`

SOLUTION :HEAT is ABSORBED.
Discussion
17.

Draw the structure of the following molecules/ions IO_(3)^(-)

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Discussion
18.

During the manufacture of cast iron, the slag (CaSiO_(3)) is formed in.

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ZONE of HEAT absorption
Zone of REDUCTION only
Zone of FUSION only
Zone of reduction and zone of fusion

Answer :1
Discussion
19.

Draw the structure of the following molecules/ions IF_(7)

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Discussion
20.

During the manufacture of canesugar, unwanted colours are removed by addorbing them on charcoal. It is often heard that in getting white sugar, in the final stage, the concentrated solution is filtered through animal bone charcoal. This sometimes leads to thebelief that sugar is not vegetarian. Similarly, many medicines are prepared by using alcohol as one of the somvent and some people do not want to use that medicine because it contains alcohol. After reading the above paragraph, answer the questions: How is the principle of adsorption used by workers in the coal mines ?

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Solution :Coal mine WORKERS use gas MAKES containing suitable adsorbents. All POISONOUS GASES present deep in the coal mine are preferentially adsorbed and the air for breating is purified.
Discussion
21.

Draw the structure of the following molecules/ions IF_(5)

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Discussion
22.

During the manufacture of canesugar, unwanted colours are removed by addorbing them on charcoal. It is often heard that in getting white sugar, in the final stage, the concentrated solution is filtered through animal bone charcoal. This sometimes leads to thebelief that sugar is not vegetarian. Similarly, many medicines are prepared by using alcohol as one of the somvent and some people do not want to use that medicine because it contains alcohol. After reading the above paragraph, answer the questions: What values are expressed in the above paragraph ?

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SOLUTION :We should not be superstitious. We should not avoid USING those materials which are essential for our life or GOOD for our HEALTH.
Discussion
23.

Draw the structure of the following molecules/ions IF_(3)

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Discussion
24.

During the kinetic study of the reaction, 2A + B to C + D. Following results were obtained. Based on the above data which one of the following is correct?

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RATE = `K[A]^(2)[B]`
rate = `k[A][B]`
rate = `k[A]^(2)[B]^(2)`
rate = `[A][B]^(2)`

Solution :d) The rate law equation may be expressed as:
Rate = `k[A]^(p)[B]^(q)` Consider II and III.
`((0.3)^(p)(0.4)^(q))/((0.3)^(2)(0.2)^(q))= (2.88 XX 10^(-1))/(7.2 xx 10^(-2))`
`(2)^(q)= (2)^(2)` or q=2
Consider I and IV,
`((0.4)^(p)(0.1)^(q))/((0.1)^(p)(0.1)^(q)) = (2.4 xx 10^(-2))/(6.0 xx 10^(-3))`
`(4)^(p) = (4)^(1)` or p=1
rate =`k[A][B]^(2)`
Discussion
25.

Draw the structure of the following molecules/ions HPO_(3)^(2-)

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Discussion
26.

During the kinetic study of the reaction 2A+B to C+D following results were obtained. {:("S.NO.",[A],[B]"in","Minitial rate of forma"),(,,,"tion of " D "in" ms^(-1)),(I.,0.1,0.1,6.0xx10^(-3)),(II.,0.3,0.2,7.2xx10^(-2)),(III.,0.3,0.4,2.88xx10^(-1)),(IV.,0.4,0.1,2.40xx10^(-2)):} On the basis of above data which one is correct ?

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`"RATE"=K[A]^(2)[B]`
`"rate"=k[A][B]`
`"rate"=k[A]^(2)[B]^(2)`
`"rate"=k[A][B]^(2)`

ANSWER :D
Discussion
27.

Draw the structure of the following molecules/ions I_(3)^(-)

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Discussion
28.

Draw the structure of the following molecules/ions I_(3)^(+)

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Discussion
29.

Draw the structure of the following molecules/ions ClO_(4)^(-)

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Discussion
30.

During the Kolbe's electrolytic decarboxylation of CH_3COONa

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`H_2` is LIBERATED at CATHODE because DISCHARGE potential of `H^+` is less than discharge potential of `Na^+`
`CH_3COO^-` is discharged preferentially at anode than `OH^-` because discharge potential of `CH_3COO^-` is less than discharge potential of `OH^-`
NaOH is discharged at cathode
`CO_2` is liberated at anode along with alkane

Solution :During the KOLBE's electrolytic decarboxylation of RCOONa in aqueous medium
`RCOONa to RCOO^(-) +Na^(+) , H_2O to H^(+) + OH^(-)`
(a) is correct because the discharge potential of `H^+` is less than the discharge potential of `Na^+` because
`E_(H^+//H_2)^o=0, E_(Na^(+)//Na)^o=-Ve`
HENCE, `H^+` is discharged at cathode as `H_2`
(b)is correct because the discharge potential of `RCOO^-` is less than the discharge potential of `OH^-` , hence `RCOO^-` is discharged at anode.
(d) is correct At anode `R-COO^(-) to R-undersetunderset(O)(||)C-oversetdotO+e^-` , `R-undersetunderset(O)(||)C-oversetdotO to R^(dot)+CO_2 , R^(dot)+R^(dot) to R-R`
Discussion
31.

Draw the structure of the following molecules/ions ClO_(3)^(-)

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Discussion
32.

Draw the structure of the following molecules: (a) (HPO_3)_3 (b) BrF_3

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SOLUTION :The STRUCTURE are GIVEN below :
Discussion
33.

Draw the structure of the following derivatives : Semicarbazone to cyclobutanone

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SOLUTION :.
Discussion
34.

During the fractional distillation of coal tar the fractrion obtained at 530K is

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LIGHT oil
anthracene oil
heavy oil
middle oil

Solution :N/A
Discussion
35.

Draw the structure of the following derivatives :Ehylene ketal of hexan-3-one

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SOLUTION :.
Discussion
36.

During the fusion of organic compound with sodiummetal, nitrogen present in the organic compoundis converted into

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`NaNO_(2)`
`NaNH_(2)`
NaCN
NaNC

Solution :When an organic COMPOUND is fused with sodium metal, nitrogen of the compound is converted to sodium cyanide.
`Na+C+N to NaCN`
This is CALLED Lassaigne's test. This is perfomed for the detection of N, S or HALOGENS in organic compounds.
Discussion
37.

Draw the structure of the following derivatives : Acetaldehydedimethylacetal

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SOLUTION :`CH_(3)-OVERSET(OCH_3)overset(|)CH-OCH_(3)`.
Discussion
38.

During the formation of polystyrene, propagating chain can be terminated by _________.

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 coupling of two polymer CHAINS
 additionnof impurity like oxyge
 limiting the SUPPLY of ethene
 all of these

Answer :D
Discussion
39.

Draw the structure of the following derivatives : Methylhemiacetal of formaldehyde.

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SOLUTION :`H-overset(OH)overset(|)UNDERSET(H)underset(|)( C) -OCH_(3)`.
Discussion
40.

During the formation of a chemical bond

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electron-electron repulsion becomes more than the nucleus-electron attraction
energy of the system does not change
energy increases
energy decreases.

Solution :During the FORMATION of a chemical BOND `rightarrow` energy decreases and THEREFORE stability increases.
Discussion
41.

Draw the structure of the following derivatives : Cyclopropanone oxime

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SOLUTION :.
Discussion
42.

During the fission of U-235, a large amount of energy of the order of 180 MeV is generated per nucleus fissioned. The amount of energy released by the fission of 0.235 g of U-235 is :

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`6.932xx10^(23)kJ`
`1.08xx10^(7)kJ`
`1.73xx10^(16)kJ`
`1.73xx10^(7)kJ`

Solution :No. of nuclei in 0.235 G of U-235
`=(6.02xx10^(23)xx0.235)/(235)`
`=6.02xx10^(20)` AMOUNT of energy released
`=6=02xx10^(20)xx180MeV`
`=6.02xx10^(20)xx180xx1.6xx10^(-16)kJ`
`=1.73xx10^(7)kJ`
Discussion
43.

Draw the structure of the following derivatives : 2,4-dinitrophenylhydrazone of C_(6)H_(5)CHO

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SOLUTION :.
Discussion
44.

During the fission of ""^(235) U , energy of the order of 180 MeV is generated per nucleus fissioned . The amount of energy released by the fission of 0.235 g of ""^(235)U is :

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`1.73 xx 10^(7) kJ`
`1.08 xx 10^(25)` kJ
`1.73 xx 10^(10) J`
`1.08 xx 10^(7) kJ`

Solution :1 nuclide `to` 180 Me V, `((0.235)/(235) xx N_(0)) to Q = ?`
`Q = (0.235 xx 6 xx10^(23) xx 180)/(235 xx 1) = 1080 xx 10^(20) MeV`
`Q = 1.080 xx 10^(23) Me V = 1.080 xx 10^(23) xx 10^(6) xx 1.602 xx (10^(-19))/(1000) KJ`
= `(1.73 xx 10^(23 + 6 - 19 - 3)) = 1.73 xx 10^(7) KJ`
Discussion
45.

Draw the structure of the following compounds i. Neopentylamine ii. Tert-butylamine alpha- amino propionaldehyde iv. Tribenzylamine v. N-ehtyl -N-methylhexan-3-amine

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Solution :i. Neopentylamine,

V. N-ethyl-N-methylhexan-3-amine:
`overset(6)(CH_(3))-overset(5)(CH_(2))-overset(4)(CH_(2))-UNDERSET(1 CH_(3))underset(|)underset(2 CH_(2))underset(|)overset(3)(CH)-overset(CH_(3))overset(|)(N)-CH_(2)-CH_(3)`
Discussion
46.

Draw the structure of the following compounds: (i) 4-Niotropropiophenone. (ii) 2-Hydroxycyclopentane carbaldehyde.

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SOLUTION :
Discussion
47.

During the extraction of iron in the blast furnace ,

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COKE acts as REDUCING agent in the lower zone and CO acts as reducing agent in the upper zone
CO acts as reducing agent in the lower zone and Coke acts as reducing agent in the upper zone
Coke acts as reducing agent in the lower zone and CO acts as OXIDISING agent in the upper zone
CO acts as reducing agent in the upper zone and Coke acts as reducing agent in the upper zone

ANSWER :a
Discussion
48.

Draw the structure of the following compounds. (a) Nitrous acid (b) Nitric acid (c ) Pernitric acid

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SOLUTION :
Discussion
49.

During the extraction of gold the following reactions take place. Au + CN^(-) + H_(2)O overset (O_(2)) to [X] [X] + Zn rightarrow [Y] + Au X and Y are respectively.

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`[Au(CN)_(2)]^(-)` and `[Zn(CN)_(6)]^(4-)`
`[Au(CN)_(4)]^(2-)` and `[Zn(CN)_(4)]^(2-)`
`[Au(CN)_(4)]^(3-)` and `[Zn(CN)_(4)]^(2-)`
`[Au(CN)_(2)]^(-)` and `[Zn(CN)_(4)]^(2-)`

Solution :During the EXTRACTION of gold.
`Au + CN^(-) + H_(2)O (OVERSET(O_(2))) to [Au(CN)_(2)]^(-)`
`[Au (CN)_(2)]^(-) + Zn RIGHTARROW [Zn(CN)_(4)]^(2-) + Au`
Here `[X] = [Au(CN)_(2)]^(-)` and `[Y] = [Zn(CN)_(4)]^(2-)`
Discussion
50.

During the extraction of copper, the concentrated ore is roasted so to remove the impurities of .. ..

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As and Sb 
Sb and FE 
Fe and As 
Fe and s 

SOLUTION :Copper ore is roasted so as to remove impurities of As and Sb in the FORM of their OXIDES. `4Sb + O_2 to Sb_2O_3`
Discussion