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.

Cortisone contains which functional groups?

Answer»

ETHER, ALKENE,alcohol
Alcohol,KETONE,AMINE
Alcohol,ketone,alkene
Ether, amine,ketone

Solution :
2.

Correctly matched option stability of compound in each of the following pairs :

Answer»


`CH_(3)CH=CHCHCH =CH_(2) lt CH_(3)CH_(2)CH_(2)CH_(2)OVERSET(.)CH =CH_(2)`

`CH_(3)overset(+)CHCH =CH_(3)CH_(3)GT CH_(3)CH=CHCH_(2)overset(+)CH_(2)`

Answer :D
3.

Correct the following electronic configurations of the elements in the ground state : (i) 1s^(2) 2s^(1) 2p_(x)^(2) 2p_(y)^(2) 2p_(z)^(2) 3s^(2) 3p_(x)^(1)(ii) 1s^(2) 2s^(1) 2p_(y)^(2) 2p_(y)^(2)2p_(z)^(1) (iii) 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(5) (iv) 1s^(2)2s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(4) 4s^(2)

Answer»

Solution :(i) `1s^(2) 2s^(2) 2p_(x)^(2) 2p_(y)^(2) 3S^(2)` (ii) `1s^(2) 2s^(2) 2p_(x)^(1) 2p_(y)^(1) 2p_(z)^(1)` (III) `1s^(2) 2s^(2) 2p^(6) 3s^(2) 3P^(6) 4s^(2) 3d^(3)`
(iv) `1s^(2) 2s^(2) 2p^(6) 3s^(2)3p^(6) 3d^(5) 4s^(1)`
4.

Correct statements (s) about is /are

Answer»

liberate `3/2` MOLE of `H_(2)` on TREATEMENT with Na.
Positive test with `FeCl_(3)`
Positive test with `NaHCO_(3)`
Positive test with tollen's reagent

Answer :A::B::C::D
5.

Correct statements (s) about is /are

Answer»

It gives coloured SOLUTION with neutral `FeCl_(3)` solution
It liberates `H_(2)` gas with Na metal
It gives positive iodoform test.
It FORMS sweet SMELLING compound with alcohols.

Answer :A::B::C
6.

Correct statements regarding silicones are a)They are used in the preparation of water proof clothes. b) They are organo silicon compounds. c) They are used in the preparation of grease and lubricants. d)They are used in paints and enamels.

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a, B, C only
b, c, d only
a, b, d only
a, b, c, d

ANSWER :D
7.

Correct statements regarding diagnal relationship between belyllium and aluminium are A) Both BeCl_(2) and AlCl_(3) are strong Lewis acids B) Both Be(OH)_(2) and Al(OH)_(3) are dissolve in excess alkali to give beryllate ion and aluminate ion respectively C) Charge/radius ratio of Bc^(2+) and A^(2+) ions is similar D) Both BeCl_(2) and AlCl_(3) are insoluble in organic solvents

Answer»

A, B, D
A, B, C
B, C, D
A, C, D

Answer :B
8.

Correct statements of the following are Fluorides can be detected by zirconium - alizarin S - dye Harmless level of fluorides in water is upto 10ppm In Nalgonda technique bleaching powder, lime and alum are added in the same order Less than 3ppm of fluoride concentration can caui1e fluorosis

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A and C
C and D
B and D
A and B

Answer :A
9.

Correct statement(s) is/are reagarding following compounds :

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All are geometrical ISOMER of each other.
All are optical isomer of each other.
All are configurational isomer of each other.
Only TWO Q and R are resolvable.

Solution :N//A
10.

Which of the following statements concerning elements with atomic number 10 is true?

Answer»

forms a covalent NETWORK solid
element is mono atomic
has ALMOST zero value of E.A
has very HIGH value of I.P.

Answer :B::C::D
11.

Correct statements among (a) to (d) regarding silicones are.... (a) They are polymers with hydrophobic character. (b) They are biocompatible. (c) In general, they have high thermal stability and low dielectric strength. (d) Usually, they are resistant to oxidation and used as greases.

Answer»

(a),(b) and (d) only
(a),(b) , (C) and (d)
(a),(b) and (c) only
(a) and (b) only

Solution :Silicones are POLYMER with Si-O-Si LINKAGES and are strongly hydrophobic. They are highly thermally stable with high dielectric strength. Now a days silicone greases are commony used.
12.

Correct statements among the following are

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The net change in ENTROPY of SYSTEM is zero in any cyclic process
the free energy change of the system at freezing POINT is zero
the change in free energy with pressure for one mole of a perfect gas, `Delta G = RT "ln" (P_(2))/(P_(1))`
for a spontaneous change `(Delta G)_(T,P) gt 0`

SOLUTION :S is a state function
13.

Correct statements about this reaction

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The correct order of RATE of reaction `C_(6)H_(6) gt C_(6)D_(6) gt C_(6)T_(6)`
`HNO_(3)` functions as an oxidising agent
In the ABSENCE of `HNO_(3)` it is reversible
The electrophil in the above reactions is `I^(o+)`

Solution :Iodination is reversible and exhibits primary KINETIC isotopic EFFECT.
14.

Correct statement(s) about molecular velocities is/are

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With increase in the TEMPERATURE fraction of molecules with most PROBABLE velocity decreases. 
With increase in the temperature, RMS velocity of gas molecules increases 
The correct order of fraction of molecules with DIFFERENT types of velocities is `C_p gt bar(C ) gt C` 
The correct velocity order of various types of velocitics is `C gt barC gt C_p`

Solution :a) as `T UARR ` fraction of moleucles with `u_(mp) darr`
B) as `T uarr, u_(rms) uarr`.
c, d) `C_p < barC < C implies ` fraction of `C_P > barC > C`.
15.

Assertion(A ): Absolute values of internal energy cannot be determined Reason (R ): It is impossible to determine the exact values of constituent energies of the substances

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

ANSWER :B
16.

Correct statement/s/is /are

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The crystal structure is observed by associating with each lattice point as identical structral moety.
A unit CELL can be thought of all the fundemental regions from which the entire crystal may be construted by purely TRANSLATIONAL displacements.
An infininte number of different unit cells can DESCRIBED the same lattice . But we normally choose with sides have shortest lengths and that are mostlty perpendicular to one another .
Unit cell are classified into seven crystal systems by REPEATING the rotational symmetry elements they posses .

Answer :A::B::C::D
17.

Correct statement (s) about the above experiment is/are:

Answer»

Y' may be due to `[Fe_(3)(OH)_(2)(CH_(3)COO)_(6)]^(+)`
SALT 'X' may be `S_(2)O_(3)^(2-)`
Z' may be BASIC iron (III) acetate
Z may be `Fe(OH)_(3)`

ANSWER :A::C
18.

Correct statement regarding the electrophilic substitution of C_(6)H_(6)

Answer»

It involves two TRANSITION state
It involves ONE intermediate which is non aromatic.
It involves one intermediate which is non aromatic
It is an ENDOTHERMIC overall

Solution :EAS is a two step process involving formation of stronger BONDS.
19.

Correct statement regarding industrial waste

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It is bio degradable
It is mostly non BIODEGRADABLE
It causes AIR pollution only
It causes SOIL pollution only

Answer :B
20.

Correct statement regarding compound (X):

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CONTAINING five gemoetrial isomers out which one is an enantiomeric PAIR
Total stereoisomer of X is 5
Allstereoisomer of X contain P.O.S
Total NUMBER of DIASTEREOMERIC pair is 9

Solution :N//A
21.

Correct statement of the following is

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solubility of `NACL` increass with INCREASE in temperature
Solubility of `NaCl` decreases with incrfease in emperature
Solubility of `NaCl` does not change appreciably with increase in temperature
`NaCl` is INSOLUBLE in WATER 

ANSWER :C
22.

Correct Statement is/are

Answer»

Individual crystals with their ORDERED ATOMIC lattices exist but are so small as to be unrecognizable except under a microscope is said to be polycrystalline .
A metallic sample may appear to be isotropic , EVEN through single crystal is ANISOTROPIC and is said to be microcrystalline .
The natural crystals of minerals formed by geological processes are often large when compared to crystals formed in the laboratory precipitation reactions (formed very rapidly from solution that are greately super saturated )
As a RESULT of continous redissolving and reprecipitation , a precipitate of virtually amorphos material can be converted to a polycrystalline substance.

Answer :A::B::C::D
23.

Correct statement is

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`K=4s^1 , Cr=3d^4 4s^2 , Cu=3d^10 4s^2`
`K=4s^2 , Cr=3d^4 4s^2 , Cu=3d^10 4s^2`
`K=4s^2 , Cr=3d^5 4s^1 , Cu=3d^10 4s^2`
`K=4s^1 , Cr=3d^5 4s^1 , Cu=3d^10 4s^1`

ANSWER :D
24.

Correct statement among the following regarding osmoles is

Answer»

SOLVENT FLOWS from high concentration of solute to LOW concentration of solute
Solvent flows from low concentration of solute to high concentration of solute
Solute flows from high concentration to low concentration
Solution flows from low concentration to high concentration

Answer :B
25.

Correct statement among the following is :

Answer»

X and Y are same


SOLUTION :It is `E_2` ELIMINATION and antiperiplanarity is REQUIRED .
26.

Correct statement among the following is

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Oxide of hydrogen is basic
Hydrogen EXHIBITS flame COLOURATION like alkali metals
Hydrogen has HIGH L.P VALUE like halogens
Electrolysis of saline hydride gives hydrogen at cathode

Answer :C
27.

Correct statement about truxilic acid is/are :

Answer»

Ithas four CHIRAL centre
It shows optical isomerism
It shows GEOMETRICAL isomerism
It is a meso compound

Solution :
si truxilic ACID, no stereoisomer out of S is optically actives so it does not show optical isomerism.
28.

Correct statement about this reaction is/are

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The reaction is completely reversible
It SHOWS primary kinetic ISOTOPIC effect
The electrophil involved in the reaction is `SO_(3)`
The electrophile involved in the reactio is `SO_(3)H^(o+)`

SOLUTION :Sulphonation of BENZENE is completely reversible the electrophile is `SO_(3)` and reaction exhibits primary kinetic isotopic effect.
29.

Correct statement about following compound is/are :

Answer»

It can show GEOMETRICAL isomerism
It is having FOUR chiral centre
It is having three OPTICAL isomers
It is having only one optical INACTIVE stereoisomer

Solution :N//A
30.

Correct statement about ethene is

Answer»

`angle(HC C)` is greater than `109.5^(@s)`
`angle(HC C)` is less than `angle(HCH)`
`C-C` BOND length is less than `C-H` bond length
Carbon underoges `SP^(3)` hybridisation

ANSWER :A
31.

Correct statement about D-monnitol (in given from):

Answer»

`C_(3)` axis of SYMMETRY
`C_(2)` axis of symmetry
Centre of symmetry is PRESENT
3-chiral centre are present

Solution :
32.

Correct statement about 'B' is/are:

Answer»

GREEN edged flame occurs due to formation methyl borate
B' is `B(OCH_(3))_(3)`
On brinding the PASTE of borax `+CaF_(2)` and conc. `H_(2)SO_(4)` close to a bunsenflame, imparts green colour to the edge of flame
Borax gets hydrolysed into boric ACID in acidic medium and then form ester of methyl borate with methyl alcohol.

Answer :A::B::C::D
33.

Correct statement about Al(BH_(4))_(3) is :

Answer»

Each `BH_(4)` UNIT forms TWO hydrogen bridges
Two of the t`BH_(4)` UNITS forms ONE hydrogen bridges and one `BH_(4)` unit forms one hydrogen bridge
One `BH_(4)` unit forms two hydrogen bridges and two `BH_(4)` units form one hydrogen bridges.
Boron form only `2c-2e` bons.

Answer :A
34.

Correct set of four quantum numbers for the valence electron of Rubidium (Z=37) is

Answer»

`5, 0, 0, +1//2`
`5, 1, 0, +1//2`
`5, 1, 1, +1//2`
`6, 0, 0, +1//2`

ANSWER :A
35.

Correct R.S configuration of following compunds is :

Answer»

R at A and R at B<BR>R at A and S at B
S at A and R at B
S at A and S at B

Solution :
36.

Correct representation of 3-methylpent-3-en-2-ol is

Answer»




ANSWER :A
37.

Correct representation of meta-aluminate ion is

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`[Al(OH)_(2)(H_(2)O)_(4)]^(-)`
`[Al(OH)_(3)(H_(2)O)_(3)]^(-)`
`[Al(OH)_(4)(H_(2)O)_(2)]^(-)`
None of these

Answer :C
38.

Correct relation among X_A, X_B, and Delta, where X_A, and X_B are the electronegativities of elements A and B.

Answer»

`X_A + X_B = 0.208 SQRT(DELTA)`
`sqrt(X_A - X_B) = 0.208 XX Detla`
`X_A - X_B = 0.208 sqrt(Delta)`
`X_A - X_B = sqrt(0.208 xx Delta)`

ANSWER :C
39.

Correct pair of compounds which gives blue colouration/precipitate and white precipitate, respectively, when their Lassaigne's test is separately done is

Answer»

`NH_(2)NH_(2).HCl` and `ClCH_(2)COOH`
`NH_(2)CSNH_(2)` and `PhCH_(2)Cl`
`NH_(2)CH_(2)COOH` and `NH_(2)CONH_(2)`

Solution :`NH_(2)NH_(2).HCl` does not contain C and hence does not give blue colour in Lassaigne's TEST. `NH_(2)CSNH_(2)` CONTAINS both N and S and hence GIVES red colour in Lassaigne's test. `NH_(2)CONH_(2)` does not contain Cl and hence does not give while ppt. Thus, `C_(6)H_(5)NHMe` contains N and hence gives blue colour while `o-C_(6)H_(4)(Cl)COOH` contains Cl and thus gives white ppt. Lassaigne's test. Hence, option (d) is correct.
40.

Correctorder of theionizationenergyof C, N, O, F is

Answer»

`F lt N ltlt C lt O `
`C lt N lt O lt N`
`C lt O lt N lt F`
`F lt O lt N lt C`

SOLUTION :Alonga period`Delta_(i)H_(1)`increasesfrom leftto right(i.e.,from Cto F )DUE todecreasingatomicsizeand increasingeffective nuclearcharge . But dueto morestableexactly HALF- filledelectronicconfigurationN hashigher `Delta_(i)H_(1)` thanthat of O Thus ,the overallincreasesin theorder :
`C ltO lt N lt F` i.e.,option( c) is correct
41.

Correct order of tendency to loss of electrons

Answer»

` Zn gt Cu gt AG `
` Zn lt Cu lt Ag `
` Zn gtCu lt Ag `
` Cu gt Zn gt Ag`

SOLUTION :`Zngt Cugt Ag` . Zn is STRONG METAL.
42.

Write the preferential order in naming polyfunctional compounds.

Answer»

`-COOH GT - COOR gt CN gt -OH gt "ALKENE" gt -SO_3H`
`-COOH gt -SO_3H gt- COOR gt CN gt -OH gt `alkene
`-COOH gt - CN gt - COOR gt -OH gt "alkene" gt -SO_3H`
`-COOH gt - SO_3H gt - COOR gt - OH gt CN gt `alkene

Answer :B
43.

Correct order of polyfunctional groups

Answer»

`-COOH gt - COOR gt - CN gt - OH gt " Alkene " gt - SO_(3)H`
`-COOH gt -SO_(3)H gt - COOR - gt CN gt - OH gt` Alkene
`-COOH gt - CN gt - COOR gt - OH gt " Alkene " gt - SO_(3)H`
`-COOH gt -SO_(3)H gt - COOR gt - OH gt CN gt` Alkene

Solution :According to NCERT - COOH should be taken as principal FUNCTIONAL group.
44.

Correct order of hydration enthalpies

Answer»

`LI^(+) GT Na^(+) gt Be^(2+) gt Mg^(2+)`
`Mg^(2+) gt Be^(2+) +Na^(+) gt Li^(2+)`
`Be^(2+) gt Mg^(2+) gt Li^(+) gt Na^(+)`
`Na^(+) gt Li^(+) gt Mg^(+) gt Be^(2+)`

ANSWER :C
45.

Correct order of first ionisation potentials

Answer»

`K LT NA`
`CA lt K`
`MG lt Ca`
`Li lt Be`

Answer :A
46.

Correct order of E_2//S_N2 ratio is :

Answer»

<P>P gt Q gt S gt R
P gt Q gt R gt S
R gt S gt Q gt P
P gt S gt Q gt R

Answer :A
47.

Correct order of boiling points of hydrogen halides is

Answer»

`(CH_(3))_(3)N lt (CH_(3))_(3)P lt (CH_(3))_(3)As lt (CH_(3))_(3)Sb `
`NH_(3) lt PH_(3) lt Ash_(3)LT SbH_(3) `
`(CH_(3))_(2)Olt (CH_(3))_(2)Slt(CH_(3))2Selt (CH_(3))_(2)TE`
`H_(2)S lt H_(2)Se lt H_(2)Telt H_(2)O`

Answer :A::C::D
48.

Correct order of atomic radii

Answer»

<P>`N LT C lt P lt S`
`C lt N lt S lt P`
`C lt N lt P lt S`
`N lt C lt S lt P`

ANSWER :D
49.

Correct order of acidic strength in Cortisone :

Answer»

`a GT B gt CGT d`
`b gt a gt C gt d`
`c gt b gt a gt d`
`b gt c gt a gt d`

SOLUTION :
50.

Correct order of 1st ionization potential among elements Be,B,C,N,O is

Answer»

`BltBeltCltOltN`
`BltBeltCltNltO`
`BeltBltCltNltO`
`BeltBltCltOltN`

ANSWER :B