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.

Cosmetic powders contain:

Answer»

`ZnCl_2`
ZNO
`ZnCO_3`
`ZnSO_4`

ANSWER :B
Discussion
2.

Cosider the given reaction for preparation of alkyne. (Fritsch reaction). Anti group will migrate because of less steric hindrance. Rate of reaction when the halide ion :

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`I^(Θ)GTCL^(Θ)gtBr^(Θ)gtF^(Θ)`
`I^(Θ)gtBr^(Θ)gtCl^(Θ)gtF^(Θ)`
`F^(Θ)gtCl^(Θ)gtBr^(Θ)gtI^(Θ)`
`F^(Θ)gtBr^(Θ)gtCl^(Θ)gtI^(Θ)`

Solution :Good leaving GROUP
Discussion
3.

Cosider the following reaction and statements: [Co(NH_(3))_(4)Br]^(+)+Br^(-) to [Co(NH_(3))_(3)Br]+NH_(3) (I) Two isomers are produced if the reactant complex ion is a cis-isomer. (II) Two isomers are produced if the reactant complex ion is a tran-isomer. (III)Only one isomers isproduced if the reactant complex ion is a tran-isomer. (IV) Only one isomers isproduced if the reactant complex ion is a cis-isomer. The correct statements are :

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(III) and (IV)
(II) and (IV)
(I) and (III)
(I) and (III)

ANSWER :D
Discussion
4.

Cosider the given reaction for preparation of alkyne. (Fritsch reaction). Anti group will migrate because of less steric hindrance. Product (A) is :

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SOLUTION :CARBENE FORMATION with ADDITION
Discussion
5.

Cosider the given reaction for preparation of alkyne. (Fritsch reaction). Anti group will migrate because of less steric hindrance. , Major product (A) is :

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`PH-C-=C^(14)-Ph`
`Ph-C-=C-Ph`

SOLUTION :ANTI MIGRATION
Discussion
6.

Co(s) +Cu^(2+)(aq) rarrCo^(2+)(aq) +Cu(s).This reaction is :

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OXIDATION reaction
Reduction reaction
Redox reaction
None of the above

Answer :C
Discussion
7.

Corrrect order of bond angle in the given compounds is/are:

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`gammaltgamma'`
`gammaltbeta=alpha`
`alphagtalpha'`
`betagtbeta'`

Solution :According to Bent.s rule, there is less s-character in `C-F` bonds in `COF_(2)` than in `C-Cl` bonds in CASE `alphaCOCl_(2)` hence `gamma.gtgamma and angleFCF` is less than `120^(@)`
`alpha=beta` as both `C-F` bonds are equivalent SIMILARLY `alpha.=beta.` as both `C-Cl` bonds are equivalent `alpha=betagtgamma`
`alphagtalpha.`betagtbeta.`
Discussion
8.

Cortisone is

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STEROID
PROTEIN
ESTER
Vitamin

Solution :Cortisone is an example of steroid.
Discussion
9.

Corundum is :

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`SiO_3`
`CaF_2`
`Al_2O_3`
`Cr_2O_3`

ANSWER :C
Discussion
10.

Corrosive sublimate (HgCl_(2)) can be used to distinguish between

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formic acid and acetic acid
acetaldehyde and butanone
formaldehyde and propanone
All of the above

Solution :Corrosive sublimate gives BLACK ppt of calomel with formic acid but it does not REACT with acetic acid.
`2HCOOH+2HgCl_(2) to Hg_(2)Cl_(2)+CO_(2)+H_(2)O`
`CH_(3)COOH+HgCl_(2) to "No reaction"`
Discussion
11.

Corrosive sublimate is :

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`HgCl_(2)`
`Hg_(2)Cl_(2)`
`Hg_(2)Cl`
`Hg_(2)Cl_(3)`

ANSWER :A
Discussion
12.

Corrosion process is basically which type of process ?

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Converstion of reaction in PRESENCE of `H_(2)O`
Electrochemical reaction
Inter reaction
Bonding reaction between LIGHT metal and HEAVY metal

Solution :Electrochemical reaction.
Discussion
13.

Corrosion of iron is essentially an electrochemical phenomenon where the cell reactions are ………………. .

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FE is oxidised to `Fe^(2+)` and DISSOLVED OXYGEN in water is reduced to `OH^-`
Fe is oxidised to `Fe^(3+)` and `H_2O` is reduced to `O_2^(2-)`
Fe is oxidised to `Fe^(2+) and H_2O` is reduced to `O_2^-`
Fe is oxidised to `Fe^(2+) and H_2O` is reduced to `O_2`

ANSWER :A
Discussion
14.

Corrosion of metals is essentially an__________ phenomenon.

Answer»

SOLUTION :ELECTROCHEMICAL
Discussion
15.

Corrosionof iron is essentially an electrochemical phenomeonon where the cell reaction are

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Fe is oxidised to `Fe^(3+)` and `H_(2)O` is REDUCED to `O_(2)^(2-)`
Fe isoxidised to `Fe^(2+)` and `H_(2)O` is reduced to `O_(2)^(2-)`
Fe is oxidisedto `Fe^(2+)`and `H_(2)O` is reduced to `O_(2)`
Fe is oxidised to `Fe^(2+)` and `H_(2)O`is reducedto `O_(2)`

SOLUTION :`Fe rarr Fe^(2+) +2E^(-)`
`O_(2) +2H_(2)O+4e^(-) rarr 4OH^(-)`
The overallreaction is
`2Fe+O_(2) +2h_(2) rarr2Fe(OH)_(2)`
`Fe(OH)_(2)` may be dehydrated to iron oxide FeO or furtheroxidisedto `Fe(OH)_(3)` and then dehydrated to ironrust`Fe_(2)O_(3)`
Discussion
16.

Corrosion of iron is essentially an electrochemical phenomenon where the cell reactions are __________.

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Fe is oxidised to `Fe^(2+)`and dissolved OXYGEN in WATER is reduced to `H_(2)O`
Fe is oxidised to `Fe^(3+)` and `H_(2)O` is reduced to `O_(2)^(2-)`
Fe is oxidised to `Fe^(2+)` jand `H_(2)O` is reduced to `O_(2)`
Fe is oxidised to `Fe^(2+)` and `H_(2)O` id reduced to `O_(2)`

ANSWER :A
Discussion
17.

Corrosion of aluminum takes place at a much slower rate than iron. Give reason.

Answer»

SOLUTION :Other METALS such as aluminium, COPPER and silver also undergo corrosion, but at a slower rate than iron. Let us consider the reduction of aluminium,
`""Al_((s)) rarr Al_((aq))^(3+)+3e^(-)`
`Al^(3+)`, which reacts with oxygen in air to form a PROTECTIVE COATING of `Al_(2)O_(3)`. This coating act as a protective film for the inner surface. So, further corrosion is prevented.
Discussion
18.

Corrosion of iron is essentially an electrochemical phenomenon where the cell reactions are

Answer»

Fe is oxidised to `Fe^(2+)` and dissolved oxygen in WATER is reduced to `overset(THETA)(OH)`
Fe is oxidised to `Fe^(3+)` and `H_(2)O` is reduced to`O_(2)^(2-)`
Fe is oxidised to `Fe^(2+)` and `H_(2)O` is reduced to`O_(2)^(-)`
Fe is oxidised to `Fe^(2+)` and `H_(2)O` is reduced to`O_(2)`

Solution :`FetoFe^(2+)+2e` (anode rection)
`O_(2)+2H_(2)O+4eto4OH^(-)` (cathode reaction) The overall reaction is
`2FE + O_(2) + 2H_(2)O to 2Fe(OH)_(2)`
`Fe(OH)_(2)` may be dehydrated to iron OXIDE FeO, or further oxidised to `Fe(OH)_(3)` and then dehydrated NTO iron rust, `Fe_(2) O_(3)`
Discussion
19.

Corrosion is an elctrochenmical process . It involves

Answer»

Loss of electrons by Iron, `FE rarr Fe^(+2) + 2e^(-)` . Ie, Iron ACTS as an anode
Inpurities act as a cathode. ELEMENTS are used in forming hydroxyl ions `H_2O + O+2e^(-) rarr 2OH^(-)`
FERROUS ions are osidised to ferric ions in presence of dissolved oxygen
`2Fe^(+2) + O + H_2O rarr 2Fe^(+3) + 2HO^-`
All the above reactions

Solution :CORROSION is electrochemical oxidation of iron
Discussion
20.

Corrosion of

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an oxidation PROCESS
a redox process
a redox process
neither an oxidation nor a redox process

Solution :Corrosion processes are electron trsfers, oxidation-reduction processes that occur when the surface of a metal is in contact with atmosphere.
A potential difference in the composition of the metal, which ARIES from LATTICE defects, imprities, or even partial oxidation. This potential difference makes it POSSIBLE fora corrosion process resembling the operation of a galvanic CELL to take place on the metal surface.
The site of oxidation and the site of the reduction can be separeted in space. Electrons flow betwenn these sites through electrical connection of a glavanic cell. Water vapor that condness on the metal surface provides the solution through which the ions flow.
Discussion
21.

Corrosion is basically a

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altered reaction in presence of `H_(2)O`
electrochemical phenomenon
interaction
UNION between TWO LIGHT metals and a heavy metal

SOLUTION :Corrosion is an electrochemical phenomenon.
Discussion
22.

Corrosion is basically a/an

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altered reaction in presence of `H_2O`
electrochemical phenomenon
interaction
union between TWO LIGHT metals and a heavy METAL

Answer :B
Discussion
23.

Rusting of iron is an electrochemical phenomenon. Explain.

Answer»

Solution :When iron object exposed to moist air corrosion takes place. Iron being ELECTROPOSITIVE undergoes oxidation releasing electrons.
These electrons go to another spot of the metal and reduces OXYGEN in presence of `H^(+)`.
Reactions:
`"Anode: "2Fe^(s) to 2Fe^(2+)+4e^(-)`
`"Cathode: "O_(2)(g)+4H^(+)+4e^(-) to 2H_(2)O`
`"OVERALL reactions: "2Fe(s)+O_(2)(g)+4H^(+) to 2Fe^(2+)+2H_(2)O`
The ferrous ions are further oxidised by atmospheric oxygen to ferric ions which COME out as rust in the form of hydrated ferric oxide. `Fe_(2)O_(3). xH_(2)O`
Discussion
24.

Corrosion.

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Solution :It is defined as the DESTRUCTION of the METAL SURFACE due to electrochemical redox process with the components of atmosphere and environment, like oxidation by oxygen in the presence of moisture, forming undesired compounds like oxides, sulphides, ETC. on the metal surface.
Discussion
25.

Correctly match is:

Answer»

<P>`d_(x^(2)-y^(2))` atomic orbital-one nodal PLANE
`p_(y)` atomic orbital-Two nodal planes
`sigma_(p_(x))`-`PSI`(gerade)
`P_(p_(y))`-`psi`(ungerade)

Solution :`sigma`-bonding molecular orbital is GRADE due tohaving center of symmetry.
Discussion
26.

Correct water solubility order/is amongst the following pairs is/are.

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`CH_(3)-CH_(2)-CH_(2)-OH GT CH_(3)-UNDERSET(CH_(3))underset(|)overset(CH_(3))overset(|)C-CH_(3)`


Answer :A::C::D
Discussion
27.

Correct water solubility order amongst the following pair is/are :

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`CH_3-CH_2-CH_2-CH_2-OH gt CH_3-undersetunderset(CH_3)(|)oversetoverset(CH_3)(|)C-OH`


Solution :(A)Surface area decreases, solublilty increases, so A is wrong ORDER.
(B)
in it, due to the PRESENCE of INTRAMOLECULAR H-bonding the solubility is decrease, so B is wrong order.
(C )
Like dissolves like so it is correct.
(D)
dipole MOMENT of I is greater than II. Greater the dipole moment greater its solubility.
Discussion
28.

Correct trends from ClO^(-) to ClO_4^- are A) Oxidation ability decreases B) Number of delocalised electrons increases C) Number of lone electron pairs on chlorine decreases D)O- Cl bond length decreases

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A,B,C only
B,C,D only
A,C,D only
A,B,C and D

Answer :D
Discussion
29.

Correct the statement and re write :- The first world was the communist countries and the third world was the capitalist countries.

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SOLUTION :The FIRST world was Capitalist COUNTRIES and the THIRD world was DEVELOPING countries.
Discussion
30.

Correct the following statements by changing the underlined part of the statement (Do not change the whole statement) Vitamins act as target molecules for drug action in body.

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SOLUTION :do not ACT
Discussion
31.

Correct the following statements by changing the underlined part of the statement (Do not change the whole statement) Synthetic detergents are easily biodegradable.

Answer»

SOLUTION :not EASILY biodegradeable
Discussion
32.

Correct the following statements by changing the underlined part of the statement (Do not change the whole statement) Equanil is a disinfectant.

Answer»

SOLUTION :TRANQUILLIZER
Discussion
33.

Correct the following statements by changing the underlined part of the statement (Do not change the whole statement) Chloramphenicol is a narrow spectrum antibiotic.

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SOLUTION :a BROAD SPECTRUM ANTIBIOTIC
Discussion
34.

Correct the following statements by changing the underlined part of the statement (Do not change the whole statement) Phenacetin is a tranquillizer.

Answer»

SOLUTION :an ANTIPYRETIC
Discussion
35.

Correct the following statements by changing the underlined part of the sentence. ul("Both polystyrene and terylene are addition polymers.")

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SOLUTION :POLYSTYRENE is an addition polymer whereas terylene is a CONDENSATION polymer.
Discussion
36.

Correct the following statements by changing the underlined part of the sentence. Teflon is an example of ul("copolymers")

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SOLUTION : TEFLON is an EXAMPLE of HOMOPOLYMERS.
Discussion
37.

Correct the following statements by changing the underlined part of the sentence. Repeating unit of teflon is H_2C=CF_2.

Answer»

SOLUTION :REPEATING UNIT of TEFLON is `F_2C = CF_2`
Discussion
38.

Correct the following statements by changing the underlined part of the sentence. Proteins are formed by the ul("addition polymerization") of aminoacids.

Answer»

Solution :PROTEINS are FORMED by the CONDENSATION POLYMERIZATION of amino acids.
Discussion
39.

Correct the following statements by changing the underlined part of the sentence. Polystyrene is an example of ul("thermosetting plastics").

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SOLUTION :POLYSTYRENE is an EXAMPLE of THERMOPLASTICS.
Discussion
40.

Correct the following statements by changing the underlined part of the sentence. Polyisoprene is an example of ul("step-growth polymer").

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SOLUTION :POLYISOPRENE is an EXAMPLE of chain-growth POLYMER.
Discussion
41.

Correct the following statements by changing the underlined part of the sentence. PAN is prepared from ul("butadiene").

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SOLUTION :PAN is PREPARED from ACRYLONITRILE `(CH_2=CHCN)`
Discussion
42.

Correct the following statements by changing the underlined part of the sentence. Neoprene is a ul("biopolymer").

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SOLUTION :NEOPRENE is a SYNTHETIC POLYMER.
Discussion
43.

Correct the following statements by changing the underlined part of the sentence. Neoprene is a polymer of ul("isoprene")

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SOLUTION :NEOPRENE is a POLYMER of CHLOROPRENE.
Discussion
44.

Correct the following statements by changing the underlined part of the sentence. Natural rubber is ul("a condensation polymer.")

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SOLUTION :NATURAL RUBBER is an ADDITION POLYMER.
Discussion
45.

Correct the following statements by changing the underlined part of the sentence (Do not change the whole sentence) Osmotic pressure of a colloidal solution is ul("much higher")than that of true solutions.

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SOLUTION :MUCH LESS
Discussion
46.

Correct the following statements by changing the underlined part of the sentence (Do not change the whole sentence) A catalyst ul("does not participate") in reaction mechanism.

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SOLUTION :PARTICIPATES
Discussion
47.

Correct the following statements by changing the underlined part of the sentence (Do not change the whole sentence) ul("Catalyst is a substance which alters ")the equilibrium constant.

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SOLUTION :CATALYST is a SUBSTANCE which does not ALTER
Discussion
48.

Correct the following statements by changing the underlined part of the sentence (Do not change the whole sentence) Catalyst increases the rate of forward reaction ul("and decreases the rate of backward reaction") in a reversible process.

Answer»

SOLUTION :as WELL as BACKWARD REACTION
Discussion
49.

Correct the following statements by changing the underlined part of the sentence (Do not change the whole sentence) Viscosity of a lyophilic sol is ul("same as that of dispersion medium.")

Answer»

SOLUTION :MUCH HIGHER than that of DISPERSION MEDIUM
Discussion
50.

Correct the following statements by changing the underlined part of the sentence (Do not change the whole sentence) Osmotic pressure of a colloidal solution is ul("much higher") of true solutions.

Answer»

SOLUTION :MUCH LESS
Discussion