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.

Which of the following can be used to convert into phenol in one or more steps?

Answer»




All of these

Solution :
Discussion
2.

Which lipids are present in essential oils?

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Solution :SIMPLE LIPIDS are present in essential oils such as menthol, CAMPHOR, LIMONENE, `beta`- pinene, geraniol, etc.
Discussion
3.

How will you convert (i) Ethanal to 2-hydroxypropanoic acid. (ii) Toluene to benzoic acid.

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SOLUTION :TOLUENE to BENZOIC ACID :
Discussion
4.

Which one of the following is not used for disinfection of drinking water

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Chlorine
Ozone
Chloramine
Phenyl

Answer :D
Discussion
5.

Which of the following involves ppi-ppi back bonding ?

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`:C Cl_2`
`BCl_3`
`B_2H_6`
`Na_2B_4O_7. 10H_2O`

SOLUTION :In : `C Cl_2` , C is `sp^2` HYBRIDIZED and has 6 electrons AROUND itself.So, Cl donate its lone pair in empty p ORBITAL of C.Similarily, Cl donote electrons in empty p orbital of B of `BCl_3`.In `B_2H_6` , B is `sp^3` hybridized and hence no BACK bonding . In `Na_2B_4O_7. 10H_2O` , two B are `sp^2`hybridized and show `ppi-ppi` backbonding with lone pair from oxygen.
Discussion
6.

Which of the following compounds will give a yellow precipitate with iodine and alkali ?

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2-Hydroxy propanal
Acetophenone
Both
None

Answer :B
Discussion
7.

Z_(2)undergo disproportion in an alkaline medium into a mixture of Z^(-) and ZO_(3)^(-). Equivalent mass of Z_(2)in the reaction is: [given that atomic mass of Z is 80 gm/mol]

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96
48
64
32

Solution :It is a disproportionation redox reaction
`3Z_(2) rarr 5Z^(-) + ZO_(3)^(-)` ……..N FACTOR of `Z_(2)= 5//3`
`therefore` Equivalent mass of `Z_(2)= (M^(@))/(5//3) = (3)/(5) [160] = 96`
Discussion
8.

What happens when ethyl amine reacts with methyl iodide ?

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SOLUTION :`C_2H_5NH_2 + 3CH_3I RARR C_2H_5(CH_3)_3I + 2HI`
Discussion
9.

Which of the following is the correct order of relative strength of acids ?

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`ClCH_(2)COOH gt BrCH_(2)COOH gt FCH_(2)COOH`
`BrCH_(2)COOH gt ClCH_(2)COOH gt FCH_(2)COOH`
`FCH_(2)COOH gt ClCH_(2)COOH gt BrCH_(2)COOH`
`ClCH_(2)COOH gt FCH_(2)COOH gt BrCH_(2)COOH`

Solution :The electronwithdrawing strengthof halogen GROUPS is in the order of `F gt Cl gt Br.`
Discussion
10.

What is the shape of ammonia molecule ?

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SOLUTION :PYRAMIDAL
Discussion
11.

The separation of colloidal particles from the particles having molecular dimensions by electricity is known as

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electrolysis
electrophoresis
Electrodialysis
electroosmosis

Answer :B
Discussion
12.

Which of the following is coloured

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`ScCl_(3)`
`TiO_(2)`
`MnSO_(4)`
`ZnSO_(4)`

SOLUTION :`MnSO_(4)rarrMn^(2+)+SO_(4)^(2-)`

Due to presence of unpaired electrons it will form COLOURED SALT.
Discussion
13.

When the azimuthalquantum number has has the value of 2 , the number of orbitals possible are

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3
0
7
5

Solution :Total values of m=(2l+1)= no orbitals in
m= MAGNETIC quantum no.
l = Azimuthal quantum no . Where l=2 REPRESENTS 'd' subshell aand d subshell has five orbitals. `(d_(xy),d_(yz),d_(ZX),d_(X^(2)-y^(2)),d_(z^(2)))`.
Discussion
14.

When a mixture, containing PCl_3 and PCl_5 is heated with ethyl alcohol , a total of 4 moles of ethyl chloride is formed . Mole ratio of PCl_3 and PCl_5 in the mixture is

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`3:1`
`1:1`
`1:3`
`2:1`

ANSWER :B
Discussion
15.

Which of the following cartion (s) will turnblue in oxidising flame ?

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`CO^(2+)`
`Cr^(3+)`
`NI^(2+)`
`Cu^(2+)`

ANSWER :a,d
Discussion
16.

Which type of ligands form chelates ?

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SOLUTION :POLYDENTATE LIGANDS.
Discussion
17.

Which of the folliwng is the order of the rate of reaction of C_(6)H_(6),C_(6)D_(6), and C_(6)T_(6) towards sulphonation?

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Same rates of reactions of `C_(6)D_(6), C_(6)D_(6)` and `C_(6)T_(6)`.
`C_(6)T_(6) GT C_(6) D_(6) gt C_(6) H_(6)`
`C_(6) H_(6) gt C_(6) D_(6) gt C_(6) T_(6)`
`C_(6) H_(6) gt C_(6) D_(6) = C_(6) T_(6)`

Solution :SULPHONATION is a reversable PROCESS and shows `1^(@)` kinetic ISOTOPE effect, wheras other `SE` reactiosn (i.e. nitration halogation, etc.) do not show `1^(@)` kinetic isotope effect.
Discussion
18.

Which substance is not an important antitoxins ?

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CITRIC acid
Ascorbic acid
Sorbic acid
BHT 

SOLUTION :BHT
Discussion
19.

Which of the following species is not aromatic -

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BENZENE
cyclooctatetraenyl dianion
tropylium ION
cyclopentadienyl cation

Solution :On applying the Huckel's rule, [`(4n + 2)pi`-ELECTRON] system,

Discussion
20.

When calomel is treated with ammonium hydroxide, a black substance is formed. The black substance is…..

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`Hg(NH_(2))_(2) + HGO`
`HgO. HgCl_(2)`
`Hg + HgO`
`H_(2)N - Hg - Cl + Hg`

Solution :
Discussion
21.

Which of the following sets of reagents would accomplish the following conversation

Answer»




ANSWER :C
Discussion
22.

What type of drug is chloramphenicol ?

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SOLUTION :CHLORAMPHENICOL is a wide SPECTRUM antibiotic and is effective against a NUMBER of microorganisms.
Discussion
23.

Which of the following compound will react faster I the S_(N^(1)) reaction and why?

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Solution :The COMPOUND (I) being a secondary alkyl halide will react faster than the compound (II) which is a primary alkyl halide in nature since the secondary carbocation formed in the SLOW step is more STABLE than the primary carbocation.
Discussion
24.

The relation between triangleG, triangleH" and "triangleS is given by

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`TRIANGLEG= TRIANGLEH+T TRIANGLES`
`triangleH= triangleG+T triangleS`
`triangleG= triangleH -T triangleS`
`triangleH= triangleG -T triangleS`

ANSWER :C
Discussion
25.

Which of the following is used as a scavenger in metallurgy?

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Na
K
Ca
Zn

Solution :CALCIUM is USED as a SCAVENGER (of `O_2,N_2`) in METALLURGY.
Discussion
26.

The total internal energy change for a reversible isothermal cycles is

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Always 100 calories PER degree
Always negative
0
Always positive

Solution :`DeltaE=0` for ISOTHERMAL REVERSIBLE cycle.
Discussion
27.

Which of the following is an example of a heterogeneous catalytic reaction

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`2SO_(2(G)) + O_(2(g)) overset(NO(g))(rarr)2SO_(3(g))`
HYDROLYSIS of an aqueous solution of sugar in PRESENCE of a mineral acid 
`2H_2O_(2(l))overset(Pt(s))(rarr) 2H_2O_(l) + O_(2(g))`
Hydrolysis of liquid ESTER in the presence of aqueous mineral acid 

Answer :C
Discussion
28.

The specific heat of a metal is 0.16. Its approximate atomic weight would be

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32
16
40
64

Solution :APPROXIMATION atomic WEIGHT = 6.4/ specific HEAT (DULONG and Peti.s law)
Discussion
29.

When the periodicity of lattice points get disturb in a certain direction it is called .........

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POINT DEFECTS 
Line defects 
Plane defects 
Impurity DEFECT 

Answer :B
Discussion
30.

Which is used for ending charge on colloidal solution

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Electrons
Electrolysis
The CHARGED ions
Compounds

ANSWER :B
Discussion
31.

What is EDTA?

Answer»

SOLUTION :ETHYLENE DIAMINE tetraacetic ACID.
Discussion
32.

Two metals M_(1) " and " M_(2) have reduction potential values of -xV and +yV respectively. Which will liberate H_(2) " and " H_(2)SO_(4)?

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Solution :Metals having higher oxidation potential will liberate `H_(2) " from " H_(2)SO_(4)`. Hence, the metal `M_(1)` having +XV, oxidation potential will liberate `H_(2)` from `H_(2)SO_(4)`.
Discussion
33.

Which sugar is called invert sugar ? Why it is called so ?

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Solution :Sucrose is called invert sugar. Sugar is obtained as DEXTROROTATORY NATURALLY. When HYDROLYSED sucrose give D-GLUCOSE and D-fructose in equimolar MIXTURE. Glucose is dextrorotatory `(+52.5^(@))` and fructose is laevorotatory `(-92.4^(@))` and as a result, the net resultant mixture is laevorotatory. This product changes from dextro (+) to laevo (-) after hydrolysis is called invert sugar.
Discussion
34.

Which one of the following will have largest number of atoms ? (i) 1 g Au(s) (ii) 1 g Na (s) (iii) 1 g Li (s) (iv) 1 g of Cl_(2)(g) (Atomic masses : Au = 197, Na = 23, Li = 7, Cl = 35.5 amu)

Answer»

Solution :(i) `"1 G Au"=(1)/(197)" MOL "=(1)/(197)xx6.02xx10^(23)" atosm"`
(ii)`"1 g Na"=(1)/(23)" mol "=(1)/(23)xx6.02xx10^(23)" atosm"`
(III) `"1 g LI"=(1)/(7)" mol "=(1)/(7)xx6.02xx10^(23)" atosm"`
(iv)`"1 g Cl"_(2)=(1)/(71)" mol "=(1)/(71)xx6.02xx10^(23)" molecules"=(2)/(71)xx6.02xx10^(23)" atoms"`
Discussion
35.

Why are reactions of higher order less in number ?

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Solution :A reaction takes PLACE because the molecules collide. The chances for a LARGE number of molecules or IONS to collide simultaneously are less. Hence, the reactions of higher ORDER are less.
Discussion
36.

What is collision frequency ?

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Solution :It is the NUMBER of collisions PER SECOND per UNIT VOLUME of the reaction mixture.
Discussion
37.

Which of the following haloakanes reacts with aqueous KOH most easily ? Explain giving reason.(i) 1-Bromobutane(ii) 2-Bromobutane(iii) 2-Bromo-2-methylpropane(iv) 2-Chlorobutane

Answer»

Solution :2-Bromo-2-methylpropane will react most EASILY with aqueous KOH because being `3^(@)`- alkyl HALIDE it follows `S_(N)1` path which results in FORMATION of a STABLE `3^(@)` - carbocation intermedate.
Discussion
38.

Which of the following is INCORRECT according to valence bond theory (VBT) ?

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The bond FORMED between metal atom/ion is purely ionic.
The NUMBER of vacant orbitals provided same as its coordination number.
Each ligand has at least one orbital CONTAINING a lone pair of electrons.
The geometry of the complex depends on the HYBRIDISATION of the central metal atom/ion.

Answer :A
Discussion
39.

the subshell that arlses after fsubshell is called g subshell then the correct statement (s)regarding g subshell is/are (a) it contains 16electrons and 8orbitals, (b) corresponds to l= 4 and first of course in 5th energy level, (c) a g orbital can have maximum of two electrons (d) 5f subshellhas higher energy than 5g subshell

Answer»

Only (a)
(B) & (C)
Only (b)
(b), (c) & (d)

ANSWER :B
Discussion
40.

Which of the following was previously known as muriatic acid

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`Cl_2`
`Br_2`
`HCL`
`H_2SO_4`

ANSWER :D
Discussion
41.

The spectrum of helium is similar to:

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`H`
`NA`
`LI^+`
`He^+`

ANSWER :B
Discussion
42.

Which one of the following reaction is Swart reaction ?

Answer»

`C_2 H_5Cl +Ag f toC_2 H_5 F+KCL` <BR>`C_2 H_5Cl+NaBr toC_2 H_5 Br +NaCl`
`C_2 H_5Cl +KIto C_2 H_5 I + KCl`
`C_2 H_5Cl+KBr toC_2 H_5 Br +KCl`

ANSWER :A
Discussion
43.

Which of the following cannot be accelerated

Answer»

`ALPHA-`PARTICLE
`BETA-`particle
Protons
Neutron

Answer :A
Discussion
44.

Total number of structural isomeric amines having molecular formula C_(4)H_(11)N are

Answer»


ANSWER :8
Discussion
45.

Which one is unimolecularreaction :

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`NH_4NO_2rarrN_2+2H_2O`
`2HIiffH_2+I_2`
`2NO_2rarr2NO+O_2`
`2NO+O_2rarr2NO_2`

ANSWER :A
Discussion
46.

Which element is used because for making filaments of electricbulbs and why?

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SOLUTION :TUNGSTEN is usedin making FILAMENTS of electric bulbs because if has very high MELTING point.
Discussion
47.

Write the structure of monomeric unit of nylon 6.

Answer»

SOLUTION :MONOMER UNIT of NYLON is
Discussion
48.

Which of the following pairs are enantiomers?

Answer»




ANSWER :D
Discussion
49.

Which one of the following is a reduction reaction

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`2Mg(s)+O_(2)rarr2Mg(s)`
`S(s)+O_(2)(g)rarrSO_(2)(g)`
`2HgO(s) rarr 2HG(l)+O_(2)(g)`
`Mg(s)+S(s)rarrMgS(s)`

Solution :Mercuricc oxides GOT reduced to MERCURY and its oxidation NUMBER changes form +2 to 0 whereas in other reaction are showin oxidation reaction
Discussion
50.

Whichoneofthefollowingismostabudant inearthcrust ?

Answer»

MG
Na
Al
Fe

Answer :C
Discussion