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.

Select incorrect option :

Answer»

`EtOEt UNDERSET(/_\)OVERSET(NaOH)rarrEtONa+EtOH`
`EtOEtunderset(/_\)overset(EtNa)rarrCH_(2)=CH_(2)+CH_(3)CH_(3)`
`EtOEtunderset(underset(""KCNS)(2)FeSO_(4))overset((1) "air HV")rarr"Red colour"`
`EtOEt+Counderset(/_\)overset(BF_(3))rarr Et-overset(O)overset(||)C-O-Et`

Solution :(a) EtOEt doesn't react with NaOH
(b)
2.

Select incorrect characteristics about [Zn(gly)_(2)]^(0) :

Answer»

It is diamagnetic in nature
It is shows optical isomerism
It is shows geometrical isomerism
It has four `N-Zn-O` bond angles

Solution :`[Zn("GLY")_(2)]^(0)` has `sp^(3)` hyb. Of Zn, and tetrahedral geometry.
3.

Select incorrect about complex [Fe(en)_(2)(bipy)]SO_(4):

Answer»


`{:(CH_(2)-NH_(2)),("|"),(CH_(2)-NH_(2)):}`
CONTAINS total three chelating ligands
oxidation NUMBER and coordination number of METAL are `+2` and SIX respectively

Solution :
4.

Select incorrect major product(s) :

Answer»




SOLUTION :N//A
5.

Select in which both have sea-saw shape-

Answer»

`XeO_(2)F_(2), SiF_(4)`
`XeO_(2)F_(2), IO_(2)F_(2)^(-)`
`TeCl_(4), I Cl_(4)^(-)`
`BrO_(3)F, XeOF_(2)`

Answer :B
6.

Select in correct statements :

Answer»

Gases which have high VALUE of van der Waals constant ‘a’ are EASILY liquefied
Easily liquefied gases are water soluble
Ions FORMING gases in a SOLVENT are soluble in that solvent
Under same conditions, `NH_3` has LOW solubility than that of `CO_2`

Answer :D
7.

Select in correct statement.

Answer»

Solid `PCl_5` EXIST as `[PCl_4]^(+)[PCl_6]^(-)`<BR>Solid `PBr_5` exist as `[PBr_4]^(+)[Br]`
The ANHYDRIDE of `HClO_4Cl_2O_7`
`NO_2` on cooling BECOMES paramagnetic.

Answer :D
8.

Select from each of thefollowingsets the hydrocarbons havinglowestand higher boilingpoint : (a) n- butane ,n-hexane , n-pentane ( b) n- pentane ,n-hexane ,2,3-dimethylbutane ( C) 3,3- dimethylpentane ,2,3-methylhexane ,n- heptane ,n- heptane

Answer»



Solution :(a)higher b.pt., N-hexane , lowerb.pt ., n- butane .
(B) higher b.pt ., n-hexane , lowestb.pt ., n- pentane
( c)higherb.pt., n-heptane by HYDROLYSIS,b,pt.,3,3,-dimethypentane .
9.

Select equation having endothermic step:

Answer»

`S^(-)(g) to S^(2-)(g)`
`NA^(+)(g) +Cl^(-)(g) to NaCl(s)`
`N(g) to N^(-)(g)`
`Al^(2+)(g) to Al^(3+)(g)`

ANSWER :A::C::D
10.

Select correctly matched with major product :

Answer»


`Ph-CH=CHCONH_(2)overset(KOBr)toPhCh=CH-NH_(2)`
`H_(2)N-UNDERSET(O)underset(||)C-NH_(2)underset(Cl_(2))overset(NaOH)toHN_(2)-NH_(2)`
`Ph-CequivC-COOHunderset(H_(2)SO_(4),DELTA)overset(HN_(3))toPhCH_(2)COOH`

SOLUTION :(b) `PhCH_(2)-CHO`(c ) `N_(2)`
11.

Select correctly matched name and structure at given pH :

Answer»

Alanine at pH = 4,`CH_(3)-overset(COOH)overset(|)(CH)-overset(o+)NH_(3)`
Pyenyl alanine at pH = 10, `CH_(3)-underset(Ph)underset(|)overset(COO^(Θ))overset(|)C-NH_(2)`
GLUTAMIC ACID at pH = 2, `HOOC-CH_(2)-CH_(2)-overset(overset(o+)NH_(3))overset(|)(CH)-COOH`
TYROSINE at pH = 12,

SOLUTION :(a) `ph-CH_(2)-underset(H)underset(|)overset(COO^(Θ))overset(|)(C)-NH_(2)`
(b)
12.

Select correctly matched major product:

Answer»




SOLUTION :
13.

Select correct statements(s):

Answer»

We can condense vapours simply by applying pressure
To liquify a gas one MUST lower the temperature below `T_(c)` and ALSO apply pressure
At `T_(c)`, there is no distinction between liquid and vapour state HENCE density of the liquid is nearly equal to density of the vapour
All the statements are CORRECT statements

Solution :N//A
14.

Select correct statements (s) :

Answer»

Acidic strength of `HBr gt HCL` but reverse is true for their REDUCING property
Basic strength of `PH_(3) gt AsH_(3)` but reverse is true for their `HhatCH` bond angle
`K_(a_(1))` of fumaric acid is higher than maleic acid but reverse is true for their `K_(a_(2))`
Cassiterite and rutile are sulphides ore

Answer :C
15.

Select correct statement(s) regarding sigma and pi bonds :

Answer»

`SIGMA` - bond lies on the line joining the nuclei of bonded atoms
`pi` - electron cloud lies on either SIDE to the line joining the nuclei of bonded atoms
`(2p_(pi)-3d_(pi)) pi` - bond is stronger than `(2p_(pi)-3p_(pi))pi` - bond.
`sigma`-bond has primary effect to decide direction of COVALENT bond, while `pi`- bond has no primary effect in direction of bond

Answer :A::B::C::D
16.

Select correct statement(s) regarding [Ni(DMG)_(2)] complex compound:

Answer»

it acts as oxidinsing agnet because `NI^(2+)` cation is having E.A.N. 34.
It is extra stabilized by hydrogen bonding
It's IUPAC name is Bis(dimethylyoximato)nickelate(II)
It's LIGAND CONTAINS two different DONAR sites

Answer :C
17.

Select correct statement(s) regarding octahedron complex having CFSE=-1.2Delta_(0).

Answer»

Compound is neither LOW spin nor high spin complex
Type of hybridisation complex does not depend upon nature of ligands
Magnetic MOMENT of complex COMPOUNDS is either `sqrt(15)B.M or sqrt(8)B.M.`
All are incorrect statements

Answer :A::B::C
18.

Select correct statement(s) regarding given complexes:

Answer»

`[Fe(CO)_(5)]`, the orbitals used for HYBRIDISATION in Fe atom are s, `p_(x),p_(y),p_(z),d_(z^(2))` and it is high spin complex
`[Pt(NH_(3))_(2)Cl_(2)]`, the orbtials used for hybridization on Pt atom are s,`p_(x),p_(y),d_(x^(2)-y^(2)) ` and it is low spin complex
`[Cr(H_(2)O)_(6)]^(3+)`, the orbitals used for hybridization in Cr atom are s,`p_(x),p_(y),p_(z),p_(x^(2)),d_(x^(2)-y^(2))` and it is high spin complex
`Ni(CO)_(4)`, the orbitals used of rhybridization in Ni atom are s,`p_(x),p_(y),p_(z)`, and it is low SPI complex

Answer :B::D
19.

Select correct statements out of following.

Answer»

`H_(3)PO_(4)`is conjugate ACID of `HPO_(4)^(-2)`
`H_(2)PO_(3)^(-1)` is conjugate acid of `HPO_(3)^(-2)`
`H_(2)PO_(2)^(-1)` can be conjugate acid of `HPO_(2)^(-2)`
`H_(2)PO_(4)^(-1)` is conjugate acid of `H_(3)PO_(4)`

Solution :`rarr H_(3)PO_(4) " is " C.A " of " H_(2)PO_(4)^(-1)`
`rarr H_(2)PO_(3)^(-1) " isC.Aof "HPO_(3)^(-2)`
`rarr H_(2)PO_(2)^(-1)` can.t behave as an acid
`rarr H_(2)PO_(4)^(-1)` is C.B of `H_(3)PO_(4)`
20.

Select correct statement(s) is /are :

Answer»

In `AsH_(3)` molecule lone pair at central atom is PRESENT in almost pure s-orbital
Number of `p pi -d pi` BOND in `SO_(3) and SO_(2)` are same
`NF_(3)` is better Lewis base than `NCl_(3)`
Stable oxidation state of Lead is `+2`

Solution :Correct statement is :
(b) Number of `p pi- d pi ` bond(s) in `SO_(3)` is TWO and in `SO_(2)` is one
(c ) Lewis BASIC order : `NCl_(3) gt NF_(3)`
21.

Select correct statement(s): (I) When excess FeCl_(3) solution is added to K_(4)[Fe(CN)_(6)] solution, in addition to Fe^(III)[Fe^(II)(CN)_(6)]^(-),Fe^(II)[Fe^(III)(CN)_(6)]^(-) is also formed due to side redox reaction (II) When FeCl_(2) is added to K_(3)[Fe(CN)_(6)] solution, in addition to Fe^(II)[Fe^(III)(CN)_(6)]^(-),Fe^(III)[Fe^(II)(CN)_(6)]^(-) is also formed due to side redox reaction. (III) Fe^(III)[Fe^(II)(CN)_(6)]^(-) is paramagnetic while Fe^(II)[Fe^(III)(CN)_(6)]^(-) is diamagnetic. (IV) Fe^(III)[Fe^(II)(CN)_(6)]^(-) is diamagnetic while Fe^(II)[Fe^(III)(CN)_(6)]^(-) is paramagnetic

Answer»

I,II
III,IV
both (a) and (B)
NONE of these

Answer :A
22.

Select correct statement(s) about following reaction : 2R-OH overset(H^+)to R-O-R + H_2O

Answer»

It is an example of `S_N` REACTION in which protonated ALCOHOL is the substrate and second molecule of alcohol is the nucleophile.
It is intermolecular dehydration of alcohols
This reaction can be `S_N2` if alcohol is `1^@`.
All of the above statements are correct.

Answer :D
23.

Select correct statements :

Answer»

Gases which have high value of Van der Waals constant `'a'` are EASILY liquefied
Easily liquenfiable gases are WATER soluble
Ions FORMING gases in a solvent are solutble in that solvent
Under same condition, `NH_(3)` has low solubility that that of `CO_(2)`

Answer :A::C
24.

Select correct statement(s) :

Answer»

hydrophilic COLLOID is a colloid in which there is a strong attraction between the dispersed phase and water
hydrophobic colloid is a colloid in which there is a lack of attraction between the dispersed phase and water
hydrophobic SOLS are often formed when a SOLID crystallises RAPIDLY from a chemical reaction or a SUPERSATURATED solution
all of the above

Solution :It is factual
25.

Select correct statement (s), about the following reaction [(CH_(3))_(3)N^(+)CH_(2)CH_(3)]OH^(-) overset(Delta)(rarr) (CH_(3))_(3)N+CH_(2)=CH_(2)+H_(2)O

Answer»

This reaction is called Hofmann ELIMINATION
`OH^(-)` ION functions as a BASE in an `E_(2)` elimination
Less substituted ALKENE is the predominant alkene
All are correct statements.

Answer :D
26.

Select correct statement (s) about following reaction : C_(2) H_(5) O^(-) + CH_(3) CH_(2) overset(Br) overset(|) CHCH_(3) overset(C_(2)H_(5)OH) to

Answer»

It is termed as `BETA`- elimination reaction
`C_(2)H_(5)O^(-)` is a BRONSTED -base
Produced are 1-butene and 2-butene
All are correct statements

Solution :`CH_(3) CH_(2) CH_(3) overset(AlBr_(3)) toCH_(3)CHClCH_(3)`
`2CH_(3)CHClCH_(3) +2Na overset("dry ether") to (CH_(3))_(2)CH-CH(CH_(3))_(2)`
27.

Select correct statement (s) about monochloroination of methycyclohexane:

Answer»

Total 10 monochloro products are obtained.
Total 8 FRACTIONS are obtained on fractional distillation of all monochloro DERIVATIVES obtained.
Out of all monochloro products only 3 are capable of showing GEOMETRICAL isomerism.
Out of all monochloro products 4 are chiral.

Solution :Total 12 obtained, 6 can show G.I.
28.

Select correct statement (s).

Answer»

Borax is used as a buffer
1M borax SOLUTION reacts with equal volumes of `2m HCL` solution
Titration of borax can be made using methyl orange as the indicator
Coloured bead obtained in borax-bead test contains metaborate

Answer :A::B::C::D
29.

Select correct statement (s) :

Answer»

Only one`1^(@)` MONOCHLORO product is obtained.
`4,3^(@)`monochloro PRODUCTS are obtained.
7 FRACTIONS are obtained on FRACTIONAL distillation.
`8,2^(@)` monochloro products are obtained.

Solution :N//A
30.

Select correct statement regarding [Ni(DMG)_(2)] complex compound.

Answer»

It acts as oxidising agent because `NI^(2+)` CATION is having EAN 34.
It is extra-stabilized byhydrogenn bonding
It's IUPAC name is Bis(dimethylglyoximato) nickelate (II)
It's ligand contains TWO different DONAR sites

Answer :D
31.

Select correct statement regarding silver extraction process .

Answer»

When the LEAD-silver alloy is RICH in silver, lead is removed by the curpellation process
When the lead-silver alloy is ICH in lead, lead is removed byparke's or pattinson's process
ZINC forms an alloy with lead, from which lead is SEPARATED by distillation
Zinc forms an alloy with silver, from which zinc is separated by distillation

Answer :A::B::D
32.

Select correct statement (s) :

Answer»

strongest force of attraction in alkyl halide is the LONDON force
London FORE is a surface attraction
Molecules with LARGER surface AREA have higher b.p
All of the above are correct statements

Answer :D
33.

Select correct statement for Cr. 6NH_3.Cl_3 and Cr.5NH_2.Cl_3

Answer»

In both COMPLEX COMPOUNDS SECONDARY valency is satisfied by only `NH_3`
In both complex compounds `Cl^(-)` are satisfying only PRIMARY valency
In both complex compounds primaryvalency is satisfied by only `Cl^(-)`
In both complex compounds all `Cl^-` are ionizable

ANSWER :C
34.

Select correct statement about valence - bond approach :

Answer»

Each bond is formed by maximum OVERLAP for its maximum stability
It represents localised electron model of bonding
Most of the electron RETAIN the same orbital locations as in a SEPARATED ATOMS
All are correct .

Answer :D
35.

Select correct statement about the reaction : NH_(4)NO_(3) to N_(2) + 2H_(2)O

Answer»


Solution :`OVERSET(+5)(NO_(3)^(-) to N_(2)^(0) , overset(-3)(NH_(4)^(+) to N_(2)^(0)`
36.

Select correct statement among following

Answer»

Compound 'C' on TREATING with conc. NaOH showns disprotionation reaction.
Compound 'C' forms diiazonium salt with AQ. `HNO_(2) or(naNO_(2)+HCl)//0.5^(@)`
Compound 'C' gives foul smelling compound with `(CHCl_(3)+KOH)`.
Compound 'C' is primary amine.

Solution :N//A
37.

Select correct statement about product p_(1) ?

Answer»

It gives yellow ppt. with `NaOH//I_(2)`
It eill rep[lace maximum 3`alpha` H ATOMS when PLACED in `D^(o+)//D_(2)O`SOLUTION for longer time.
It will give 2,4-DNP test.
It will give n-pentene when reduced with Zn-Hg /HCl.

Solution :N//A
38.

Select correct statement.

Answer»

CANE SUGAR is laevorotatory.
Cane sugar is dextrarotatory.
Invent sugar is laevorotatory.
Invert sugar is dextrarotatory.

Solution :N//A
39.

Select correct statement.

Answer»

Lassaigen's extrect made by E gives prussian BLUE colour with `FeSo_(4)+FeCl_(3)`.
Lassaingne's extreact of D gives pale yellow PPT. with aq. `AgNO_(3)`.
Lassaingne's extreact of D gives BLACK colour with `Pb(Oac)_(2)`.
B reacts with Mg/ether followed by Me-Br to

Solution :N//A
40.

Select correct statement -

Answer»

b.p. of 1 molal NaCl solution is TWICE that of 1 molal SUCROSE solution
b.p. elevation of 1 molal GLUCOSE solution is half of the 1 molal KCL solution
b.p. is a colligative property
All of the above

Answer :B
41.

Select correct statement :

Answer»

Product mixture is having no optical activity if ALCOHOL is FULLY consumed.
Organic product is having no `O^(18)`.
This reaction follows `A_(AL^(2))` mechanism.
None of the above

Solution :Rate of reaction of chiral compound is different with enantiomers, so with limited alcohol the ester will not be FORMED in even AMOUNT.
42.

Selectcorrect statement :

Answer»

Geometricalisomersof COMPLEXES may differin dipole MOMENT and visible / UV SPECTRA
Complexes of the TYPE `[Ma_3b_3]` can also havefacial (FAC) and meridional (mer ) isomer
No optical isomer exists for thecomplextrans-`[co(en)_2Cl_2]^(+)`
All are correct

Answer :D
43.

Select correct statement :

Answer»

The `d_(x^(2)-y^(2))` and `d_(z^(2))` orbitals are called `e_(g)` orbitals for octahedral splitting
The `d_(XY), d_(XZ)" and "d_(yz)` orbitals LIE between the axes and collectively called `t_(2g)` orbitals
both are correct
NONE is correct

Answer :C
44.

Select correct set of species which can't react with water burt react with NaOH, (i) NO_(2) (ii) P_(4) (iii) Al (iv) I_(2)

Answer»

Only (IV)
(III) and (iv)
(II), (iii) and (iv)
all (i), (ii), (iii) and (iv)

SOLUTION :
45.

Select correct sreaction :

Answer»




SOLUTION :
46.

Select correct properties of emulsions

Answer»

emulsions EXHIBIT TYNDALL effect 
Oil emulsions are more viscous than the aqueous emulsions 
ELECTRICAL conductance of aqueous EMULSION is higher than that of oil emulsion 
emulsion exhibits brownian movement 

Solution :In colloidal solutions emulsions exhibit tyndal effect
oil emulsions are more viscous than the aqueous emulsions
for AQ emulsions electrical conductance more emulsions exhibit brownian moment
47.

Select correct order of stability of different forms of 1-Chloro-4-iodo cyclohexane.

Answer»

`IV GT III gt I gt II`
`IV gt I gt III gt II`
`III gt II gt I gt IV`
`II gt I gt III gt IV`

ANSWER :A
48.

Select correct order(s) of electronegativity of element is/are:

Answer»

Paulling scale (E.N. of F-atom)gtMulliken scale (E.N. of F-atom)
`Cl_(2)O_(7)` (E.N. of CL-atom) `gtCl_(2)O_(5) ` (E.N. of C-atom)
`CH_(4)` (E.N. of C-atom) `gtCO_(2)` (E.N. of C-atom)
`CU^(2+)` (E.N.) `gtCu^(+)` (E.N.)

SOLUTION :Electronegativity of central atom is directly proportional to oxidation STATES.
49.

Select correct order of dipole moment?

Answer»

`B_(3)N_(3)H_(6)gtC_(6)H_(6)`


trans-1,2-dibromoethene GT cis-1,2-dibromoethene

Solution :(a) `mu:B_(3)N_(3)H_(6)=C_(6)H_(6)=0`
(c)
50.

Select correct order between given compounds .

Answer»

`COCl_(2)gtCOF_(2)` : `XCX` bond ANGLE
`NO_(2)FgtNO_(2)Cl` : `ONO` bond angle
`SO_(2)F_(2)ltSOF_(2)` : `FSF` bond angle
`N_(2)F_(2)ltN_(2)(CH_(3))_(2)` : `N-N` bond length

ANSWER :A::B::D