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.

Identify the isomerism in each of the following pairs. (i) CH_(3)OCH_(2)OCH_(3) and CH_(3)CH_(2)OH (ii) CH_(3)CH(OH)CH_(2)OH and CH_(2)OHCH_(2)CH_(2)CH_(2)OH (iii) CH_(3)-underset(CH_(3))underset("|")"CH"-CH_(2)-OH and CH_(3)-CH_(2)-CH_(2)-CH_(2)-OH

Answer»

Solution :(i) FUNCTIONAL isomerism
(a) dimethoxy methane
(b) 2-methoxy ETHANOL
(ii) position isomerism -DIOL position is changed
(a) propane-1,2-diol
(b) propane-1,3-diol
(iii) chain isomerism - CARBON chain is changed.
(a) isobutyl alcohol
(b) n-butyl alcohol
Discussion
2.

Identify the isomeric alkanes (molecular formula = C_(5)H_(12))which produce (ii) three isomeric monochlorides.

Answer»

Solution :The alkane which produces three monochlorides must have three TYPES of non-equivalent hydrogen-atoms and hance, the alkane is pentane `(Coverset(a)H_(3)Coverset(B)H_(2)Coverset(c)H_(2)Coverset(d)H_(2)Coverset(a)H_(3))`. Substitution of H-atoms labeled a,b and c lead to the FORMATION of three monochlorides.
Discussion
3.

Identify the isomeric alkanes (molecular formula = C_(5)H_(12))which produce (i) a single monochloride.

Answer»

Solution :The alkane which produces only ONE MONOCHLORIDE must have EQUIVALENT H-atom. Therefore, the alkane is neopentane or 2,2-dimethylpropane `[(CH_3)_(4)C]`.
Discussion
4.

Identify the intraveneous general anaesthetics?

Answer»

MILK of MAGNESIA
lidocaine
omeprazole
ISO flurane

Solution :iso flurane
Discussion
5.

Identify the intermediate product in the following conversion.

Answer»


ANSWER :`(##MOT_CON_JEE_CHE_C13_E03_013_A01##)`
Discussion
6.

Identify the intensive quantity from the following

Answer»

ENTHALPY and temperature
Volume and temperature
Enthalpy and volume
Temperature and REFRACTIVE index

Answer :D
Discussion
7.

Identify the intensive quantities from the following

Answer»

Enthalpy
Temperature
Volume
REFRACTIVE index

SOLUTION :Those PHYSICAL properties which are not based upon the mass are known as INTENSIVE properties.
Discussion
8.

Identify the incorrect statement(s) among the following : (I) Moist ammonia gas can be dried by using anhydrous CaCl_(2). (II) When metallic copper reacts with very dilute nitric acid, ammonium nitrite is one of the products. (III) Phosphine is more soluble in water than NH_(3). (IV) NaH_(2)PO_(2) is an acidic salt and it is named as a sodium hypophosphate. Correct code is :

Answer»

I and III
I and IV
II and III
All of these

Solution :`lambdaprop(1)/(V)`
Discussion
9.

Identify the intensive quantity from the following?

Answer»

ENTHALPY and temperature
Volume and temperature
Enthalpy and volume
Temperature and REFRACTIVE index

Answer :D
Discussion
10.

Identify the incorrect statements among the following

Answer»

d-block elements show irregualr and erratic chemical properties among themselves
La and Lu have partially filled d ORBITALS and no other partially filled orbitals
The CHEMISTRY of various lanthoids as very similar
4F and 5f orbitals lanthanoids is very similar

Solution :4f and 4f belongs to DIFFERENT energy levels, hence the shielding effect on them is not the same.
Shielding of 4f is more than 5f. Hence (d) is CORRECT.
Discussion
11.

Identify the incorrect statements .

Answer»

rusting of iron in the presence of the AIR and MOISTURE, is a slow REACTION
inversio of a cane sugar OCCURS at a MODERATE rate
hydrolysis of starch is a fast reaction
ionic reactions are the examples of fast reactions

Solution :Hydrolysis of starch proceeds with a moderate rate.
Discussion
12.

Identify the incorrect statement with respect to starch :

Answer»

STARCH has `alpha`-linkages
It is water insoluble carbohydrate.
Starch is made of two components: AMYLOSE (major) and AMYLOPECTIN (MINOR)
It is principal storage of polysaccharide of plants.

Solution :Starch is made of two components: Amylose (major) and Amylopectin (minor) In starch, amylose in minor COMPONENT and amylopectin is a major component.
Discussion
13.

Identify the incorrect statement with respect to ozone.

Answer»

It is FORMED when dry stream of `O_2` is passed through a silent electrical discharge
It ACTS as a powrful oxidizing agent
It's DECOMPOSITION into oxygen reults in an INCREASE in entropy
Ozone PROTECTS the earth's inhabitants by absorbing(gamma) radiations

Answer :D
Discussion
14.

Identify the incorrect statement with respect to KMnO_4

Answer»

DARK PURPLE in colour
It is decolourised by oils
Paramagnetic in nature
The ANION has TETRAHEDRAL structure

Answer :C
Discussion
15.

Identify the incorrect statement (s).

Answer»

Alkynes are more REACTIVE than ALKENES towards ELECTROPHILIC ADDITION reaction.
Alkynes are less reactive than alkenes towards electrophilic addition reaction .
Alkynes decolourise `Br_2` water .
Addition of HBr to alkynes in presence of peroxide proceeds via Markovnikov's rule .

Answer :A::B::C
Discussion
16.

Identify the incorrect statement regarding heavy water :

Answer»

It reacts with `SO_(3)` to FORM deuterated sulphuric ACID`(D_(2)SO_(4)),`
It is uded as a coolant in nuclear reactors.
It reacts with `CaC_(2)` to produce `C_(2)D_(2) and Ca(OD)_(2)`.
It reacts with `Al_(4)C_(3)` to produce `CD_(4) and Al(OD)_(3)`.

Solution :Heavy water acts as moderator. This is used in nuclear reactors to slow down the SPEED of fast moving NEUTRONS. More will be the ionisable `Cl^(-)` in complex.
Discussion
17.

Identify the incorrect statement from the following in froth floatation method

Answer»

Froth carries the MINERAL PARTICLES
Froth carries gangue particles
Froth collectors enhance the non-wettability of the mineral particle with WATER
The mineral particles become wet by OILS while gangue become wet by water.

Answer :2
Discussion
18.

Identify the incorrect statement from the given below.

Answer»

Lithopone is cheap and POSSESS good COVERING power
Lithopone is YELLOW pigment
Lithopone is prepared by MIXING barium sulphide and zinc sulphate
Lithopone is used in medicine as radiocontrast agent.

Answer :B
Discussion
19.

Identify the incorrect statement form the following :

Answer»

Ozone ABSORBS the intense ULTRAVIOLET radiation of the sun.
DEPLETION of ozone layer is because of its CHEMICAL reactions with chlorofluoro alkanes.
Ozone absorbs infrared radiation.
Oxides of nitrogen in the atmosphere can cause the depletion of ozone layer.

Solution :Ozone does not absorb infrared radiation. It absorbs ultraviolet rays from sun.
Discussion
20.

Identify the incorrect statement from the following

Answer»

Ozone absorbs the intense ULTRAVIOLET radiation of the sun.
Depletion of ozone layer is because of its chemical REACTIONS with chlorotluoro alkanes
Ozone absorbs infrared radiation.
Oxides of nitrogen in the atmosphere can cause the depletion of ozone layer.

Solution :The ozone layer, existing between 20 to 35 km above the earth's surface, shield the earth from the harmful U. V. radiations from the sun. Depletion of ozone is caused by oxides of nitrogen
`N_(2)O+hv UPSILON to NO+N`
`NO+O_(3) to NO_(2)+O_(2)`
`O_(3)+h upsilon to O_(2)+O`
`NO_(2)+O to NO+O_(2)`
`2O_(3)+h upsilon to 3O_(2) ` (Net raction)
The presence of oxides of nitrogen increase thedecomposition of `O_(3)`.
Discussion
21.

Identify the incorrect statement among the following:

Answer»

There is a decrease in the RADII of the ATOMS or ions as one proceeds from La or Lu
Lanthanide contraction is the accumulation of SUCCESSIVE shrinkages
As a RESULT of lanthanide contraction, the properties of 4d series of the transition elements have no similarities withthe 5d series of elements
Shielding power of 4f electrons is quite weak

Solution :The regular decrease in the radii of lanthanide ions from `La^(3+)` to `Lu^(3+)` is known as lanthanides contraction.
It is due to the greatest effect of the increased nuclear charge than that of screening effect (shielding effect).
As a result of lanthanide contraction, the atomic radii of ELEMENT of 4d and 5d comes closer, so the properties of 4 d and 5d- transition element shows the similarities.
Discussion
22.

Identify the incorrect statement among the following -

Answer»

d - block elements show irregular and erratic chemical properties among themselves.
La and Luhave partially FILLED d - ORBITALS and no other partially filled orbital.
The chemistry of VARIOUS lanthanoids is very similar.
4F and 5f - orbitals are EQUALLY shielded.

Answer :D
Discussion
23.

Identify the incorrect statement among the following

Answer»

Ozone reacts with `SO_(2)` to give `SO_(3)`
SILICON reacts with `NaOH_((aq))` in the presence of air to give `Na_(2)SiO_(3)` and `H_(2)O`
`Cl_(2)` reacts with excess of `NH_(3)` to give `N_(2)` and HCl
`Br_(2)` react with hot and strong NAOH solution to give NaBr,`NaBrO_(4)` and `H_(2)O`

Solution :`Br_(2)` reacts with hot and strong NaOH to give NaBr,`NaBrO_(3)` and `H_(2)O`.
Discussion
24.

Identify the INCORRECT statement among the following.

Answer»

d-block elements show irregular and ERRATIC chemical properties among themselves.
La and Lu have partially filled d-ORBITALS and no other partially filled orbitals.
The chemistry of VARIOUS lanthanoids is very similar.
4f and 5f orbitals are equally shielded.

Answer :D
Discussion
25.

Identify the incorrect statement among the following :

Answer»

Silicon reacts with `NaOH(aq)` in the presence of air to GIVE `Na_(2)SiO_(3) and H_(2)O`
`Cl_(2)` reacts with excess of `NH_(3)` to give `N_(2)` and `HCl`
`Br_(2)` reacts with hot and strong `NaOH` solution to give `NaBr, NaBrO_(4) and H_(2)O`
Ozone reacts with `SO_(2)` to give `SO_(3)`.

Solution :`3Br_(2)+underset("hot")(6NaOH)rarr 5NaBr+NaBrO_(3)+3H_(2)O`
Discussion
26.

Identifythe incorrectstatementaboutthe basicnatureof amines

Answer»

Aralkyl AMINES are lessbasicthanammonia
ANILINEIS morebasicthanammonia
p-nitroanilineis morebasictha paraaminobenzoicacid
p-aminophenolis LESS than paramethyl aniline

ANSWER :B
Discussion
27.

Identify the incorrect statement about supersaturated solutions

Answer»

It contains more solute than the amount of solute it can DISSOLVE at a particular temperature
The solutions is always in equilibrium with the SOLID substance
If a crystal is added to SUPERSATURATED solution, crystallization occurs rapidly
It is obtained by cooling a HOT concentrated solution of a solid in a liquid in the absence of traces of solids

ANSWER :B
Discussion
28.

Identify the incorrect statement .

Answer»

Polymersare MACROMOLECULES
Polymers have high molecular MASS
The repeatingstructuralunit of a polymeris called monomer
NONE of the above

SOLUTION :All of the given statements are correct . Polymers are the macromolecules haing high molecularmass. Polymers are FORMED by the repeating structural units, called monomers.
Discussion
29.

Identify the incorrect statemens

Answer»

All the five P-Cl bonds are identical in `PCl_(5)`
`/_H-P-H` bonds angles in `PH_(3)` are smaller than `/_H-N-H` bonds angles in `NH_(3)`.
`CO_(2)` is non polar, while `SO_(2)` is polar.
The dipole moment of `NF_(3)` is much higher than `NH_(3)`

Solution :In `PCl_(5)`, the phosphorus atom is `sp^(3)d-` hybridised givig five hybrid orbitals. These hybrid orbitals are directd towards the five corners of a trigonal bipyramid. However these five hybrid orbitals are not equivalent. Two axial bondshave large dp character and EQUATORIAL bonds have more `sp^(2)` character.
Both `NF_(3)` and `NH_(3)` molecules have trigonal pyramidal shape, but hte former has lower dipole moment than latter. In `NF_(3)` molecule, F being more electronegative than N the electron pairs are ATTRACTED more towards the FLUORINE atom. Hence themoment of the lone pair electrons on N atom and N-F bond moment act in opposite direction. As a result the resultant dipole moment is lowered.
On the other hand in `NH_(3)` molecule N being more electronegative than H the bond pair electrons are attracted more towards nitrogen atom. Hence the moment due ot lone pair electrons on N-atom and the N-H bond moments act in the same direction. As a result the resultant dipole moment of `NH_(3)` is much highr than `NF_(3)`
Discussion
30.

Identify the incorrect match among the following

Answer»




ANSWER :D
Discussion
31.

Identify the incorrect combination of IUPAC name of the complex and its formula :

Answer»

Tetraammineaquachloridocabalt(III) CHLORIDE
`to[Co(NH_(3))_(4)(H_(2)O]Cl]CL_(2)`
Potassium trioxalatoaluminate(III)
`toK_(3)[(Al(C_(2)O_(4))_(3)]`
Dichloridobis (ethane-1, 2-diamine) cobalt(II)
`to(CoCl_(2)(en)_(2)]^(+)`
Mercury tetrathiocyanatocabaltate(III)
`to(HG[Co(SCN)_(4)]`

SOLUTION :`[CoCl_(2)(en)_(2)]`
Discussion
32.

Identify the incorrect characteristic of carbenes,: CR_2

Answer»

CONTAIN CARBON ATOM with only SIX VALENCE electrons
nutral specis
very reactive
normally neocleophylic

Answer :D
Discussion
33.

Identify the hydrocarbon having molecular formula C_(5)H_(6) which gives white ppt with ammonical AgNO_(3) ?

Answer»




SOLUTION :N//A
Discussion
34.

Identify the halide ore among the following.

Answer»

EPSOM Salt
Pyrolusite
Anglesite
Rock Salt

Answer :D
Discussion
35.

Identify the geometrical isomers of the following:-

Answer»

I with III
II with IV
I with II
None of these

Answer :C
Discussion
36.

Identify the gas which is readily adsorbed by activated charcoal:

Answer»

`N_(2)`
`SO_(2)`
`H_(2)`
`O_(2)`

SOLUTION :In general, more EASILY liquefiable gases (ie.higher critical temperatures) are readily adsorbed as van der Waal.s forces are stronger near the critical temperatures. Thus, 1 g of ACTIVATED charcoal adsorbs 380 ml of sulphur dioxide (critical temperature `157^(@)C`), 16 ml of methane (critical temperature -`83^(@)C`) and 4.5 ml of HYDROGEN (critical temperature - `240^(@)C`).
Discussion
37.

Identify the gas which is readily adsorbed by activated charcoal?

Answer»

`N_2`
`SO_2`
`H_2`
`O_(2)`

SOLUTION :`SO_2`
Discussion
38.

Identify the gas whichisreadily adsorbed by activated charcoal ?

Answer»

`N_(2)`
`SO_(2)`
`H_(2)`
`O_(2)`

SOLUTION :`SO_(2)`
Discussion
39.

Identify the gas A, B and C.

Answer»

SOLUTION :`A=Cl_(2) , "" B=Br_(2), "" C=l_(2)`
Discussion
40.

Identify the following terms in the complex K_(4)[Fe(CN)_(6)] (i) Cation (ii) Anion (iii) ligand (iv) central metal ion (v) Oxidation state of metal (vi) IUPAC name

Answer»

SOLUTION :
Discussion
41.

Identify the food preservative which is most commonly used by food producers?

Answer»

sodium cloride
sodium sulphate
BAKING SODA
BENZOIC acid

SOLUTION :sodium cloride
Discussion
42.

Identifythe following Na_(2)CO_(3)overset(SO_(2)) to Aoverset(Na_(2)CO_(2)) to Boverset("Element S") to Coverset(I_(2)) To D Alsomentiontheoxidationstate of S in allthecompounds

Answer»

Solution :`Na_(2)CO_(3) +2SO_(2) + H_(2)O rarr 2NaHSO_(3) + CO_(2)`
`2NaHSO_(3) + Na_(2)CO_(3) rarr2NA_(2)SO_(3)+ H_(2)O + CO_(3)`
`Na_(2) SO_(3) + S rarr Na_(2) S_(2)O_(3)`
`2Na_(2)S_(2)O_(3) + I_(2) overset(Delta)rarr Na_(2)S_(4)O_(6) + 2NaI`
OXIDATIONSTATES ofsulphur :
`NaHSO_(3) (+6) Na_(2)SO_(3)(+6)`
`Na_(2)S_(2)O_(3) +(+2) or (+5 and - 1)`
`Na_(2)S_(4)O_(6) (+2) or (+5 and 0)`
Discussion
43.

Identify the following : (i) Oxoanion of chromium which is stable in acidic medium. (ii) The lanthanoid element that exhibits +4 oxidation state.

Answer»

SOLUTION :(i) Oxoanion of chromium which is STABLE in acid medium is `Cr_(2)O_(7)^(-2)`.
(ii) The LANTHANOID element that exhibits +4 oxidation state is CERIUM.
Discussion
44.

Identify the following double bonds either E,Z or None (N) in the compounds given below either. (a) Bongkrekic acid is a toxic compound produced by pseudomonas cocovenenans, and isolated from a mold that rows on bongkrek, a fermented Indonesian coconut dish. (a) Label each double bond as E,Z or neither (N). (b) How many total stereoiomers (including all types) are possible for bongkrekic acid ?....... (c ) How many sites of unsaturation are present in bongkrekic acid ?............

Answer»


SOLUTION :(A) 1-N ,
2-Z ,
3-E
4-Z ,
5-Z
(B) 1-Z ,
2-E ,
3-E :
4-Z ,
5-Z , 6-E
If hight priority atoms/groups are situated on same dise then CONFIGURATION will be (Z) and if these are situated on opposite side, then congiuration will be (E).
Discussion
45.

Identify the following compounds : i.overset (C_(6)H_(6)) underset ((A)) overset (2H_(2)SO_(4)) rarr (B) overset (1. NaOH, 540 K) underset (2. HCI) rarr (C) ii. iii. iv. v. vi. vii. vii. ix.overset (PhOMe) underset ((A))overset (1. BBr_(3)) underset (2. H_(2)O) rarr Products x. xi. xii. xiii. xiv. xv. xvi. xvii. xviii. xix. xx. xxi. xxii. xxiii.

Answer»

Solution :i.
II.
iii.
iv.
v.
The hemiacetal
is formed reversibly, while electrophilic substitution of phenols by carbonyl compound in `H^(o+)` gives irreversibly formed product (I) which futher reacts with phenol to give (C).

vi.
vii.(B) (Trialkyloxonium salts) are good alkylating agents. `SN^(2)` reaction occurs with the nucleophile `(BuOH)` displacing `Et_(2)O` (a good leaving group).

vii.
There is no change in the configuration of (C), i.e., retention of the configuration occurs since `(C---O)` bond is not broken.
ix. `BBr_(3)` form complexes with the ether

It PLAYS a role similar to H in HI.

The products are: `MeBr + PhOH + H_(3)BO_(3)`.
x.
In (A), the axial-like encricled H atom hinder the endo APPROACH (same side) by bulky MCPBA, so it approaches form other side, given exo-epoxide (C). The intermediate bromonium ion is also exo. It is opened by an attack with the (OH) endo, which can give only endo epoxide (B).
xi.
xii.
xiii. Commercial method for the synthesis of glycerol:

xiv.
xv.
xvi.
xvii. Dialkyl lithium cuperate is less REACTIVE than Grignard regent, hence `(C=O)` group is not REDUCED by `R_(2)CuLi`.

xviii.
xix. xx.
xxi.
xxii.
Discussion
46.

Identify the following as biodegradable and nonbiodegradable polymers:polyvinyl chloride (PVC) , (ii) poly hydroxybutyrate(PHB) , (iii) polystyrene (PS) , (iv)polypropylene (PP) , (v)polylactic acid (PLA) , (vi) polyethylene (PE) ,(vii)protein ,(viii) polyglutamic acid

Answer»

Solution :BIODEGRADABLE POLYMERS: (ii)polyhydroxybutyrate (PHB), (v)polyactic acid (PLA), (VII) PROTEIN, (viii)polyglutamic acid
Non - biodegradable polymers : (i)polyvinyl chloride (PVC),(iii)polystyrene (PS), (iv)polypropylene (PP), (vi)POLYETHYLENE (PE)
Discussion
47.

Identify the followingcompound which exhibits geometrical isomerism:

Answer»

But - 2 - ene
But - 1 - ene
Butane
Iso - butane

Solution :The necessary and sufficient condition of a compound to exhibit geometrical isomerism is that the two groups attached to the same carbon must be DIFFERENT , i,e ., alkenes of the following TYPES show cis-trans isomerism .
ABC = Cab , abC= CCD , abC = Cax , abC = Cbx
Thus, out of the given examples , only but - 2- ene EXHIBITS geometrical isomerism.
Discussion
48.

Identify the final product Z in the following sequence of reactions C_(2)H_(5)Ioverset(" KOH alc.")(rarr)X overset("HBr")(rarr)Y overset("CH_(3)ONa")(rarr)Z

Answer»

`C_(2)H_(5)OCH_(3)`<BR>`CH_(2)=CH_(2)`
`C_(2)H_(5)OH`
`C_(2)H_(5)Br`

Answer :A
Discussion
49.

Identify the final pr(Z) in the following sequence of reactions.

Answer»




ANSWER :C
Discussion
50.

Identify the final product (Y) ,underset(Delta)overset((i)CHCl_(3)//KOH(aq))rarr(x)underset("Conc."HCl//Delta)overset((ii)Zn-Hg)rarr(y)

Answer»




SOLUTION :SCHIFF BASE is `R-CH=NR`
Discussion