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.

Whitethe resonatingstructuresfor SO_3 ,NO_2 andNO_(3)^(-) ?

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SOLUTION :
Discussion
2.

What is the structure of ammonia & water molecule ?

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SOLUTION :PYRAMIDAL and BENT STRUCTURE respectiyely.
Discussion
3.

Which of the following indicates Charles' law mathematically (when n, P are constant)? a) VT = constant "" b) V_t = V_0 (1 + t/(273)) c)V_0 = V_t (1 + t/273)""d) V/T = constant (when n, P are constant)

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a,c
a,b
b,c
b,d

Answer :D
Discussion
4.

The unit of dipole moment is ……………………..

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SOLUTION :`"COULOMB"^(-1) m^(2)`
Discussion
5.

Which of the following is called non benzonoid molecule / ion

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All the above

Answer :D
Discussion
6.

What volume of O_(2) is liberated at STP by warning 3.4 g of hydrogen peroxide ?

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Solution :`2H_(2)O_(2)to2H_(2)O+O_(2)`
`2xx34g` of `H_(2)O_(2)` can LIBERATE `22.4L` of `O_(2)` at STP.
`3.4g` of `H_(2)O_(2)=(3.4xx22.4)/(2xx34)=1.12L` of `O_(2)` at STP.
Discussion
7.

Which of the following shows geometrical isomerism

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`BrCH=C=C=CHBr`

`CH=C=C=CBr`
`CH_(2)=C=C=CHBr`

ANSWER :A
Discussion
8.

What of the following can not show optical isomerism?

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SOLUTION :N//A
Discussion
9.

Which of the following pairs of compounds are geometrical isomers

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Crotonic ACID and cinnamic acid
Maleic acid and malonic acid
Ethylene DICHLORIDE and ethylidene dichloride
Maleic acid and fumaric acid

Solution :
Fumaric ACIDS are GEOMETRICAL ISOMERS
Discussion
10.

Which of the following reactions requires an oxidant -

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`Cu^(2-)TOCU`
`Cu_(3)P_(2)to2PH_(3)`
`2S_(2)O_(3)^(2-)`
`SO_(3)toSO_(4)^(2-)`

Answer :C
Discussion
11.

Which of the following is Lindlar's catalyst ?

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Pd+Pt
Ni+P
Pt+Charcoal
Pd+Charcoal

Answer :D
Discussion
12.

Two liquids X and Y on mixing gives a warm solution. The solution is

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1) ideal
2) non-ideal and shows positive deviation from RAOULTS LAW
3) ideal and shows NEGATIVE deviation from Raoults Law
4) non-ideal and shows negative DEVIATIONS from Raoults Law

Solution :`Delta H _(mix)` is negative and SHOW negative deviation from Raoults law.
Discussion
13.

What is resonance energy?

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Solution :Resonance ENERGY is ALSO known as STABILISATION energy. ..The difference in energy between the actual STRUCTURE and the LOWEST energy resonance structure is called the resonance energy..
Discussion
14.

This reaction is called

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Dakin-REACTION
Lederer-Manasse reaction
Ittar reaction
None of these

Solution :This reaction is CALLED Lederer Manasse reaction.
Discussion
15.

Which of the following is the most stable conformer of 1, 2, 4 -trimethyl cyclohexane

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SOLUTION :All METHYL GROUPS are in EQUATORIAL POSITIONS.
Discussion
16.

What mass of magnesium hydroxide is required to neutralise 125 mL of 0.136 M HCl solution ? ("Substance")/(Mg(OH)_(2)) "" ("Molar mass")/(58.33 " g mol"^(-1))

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0.248 g
0.496 g
0.992 g
1.98 g

Solution :N//A
Discussion
17.

The recation H_(3)PO_(2)+D_(2)OtoH_(2)DPO_(2)+HDO indicates that hypo-phosphrous acid is….

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TRIBASIC acid
dibasic acid
mono basic acid
none of these

Solution :Hypophosphorus acid on reaction with `D_(2)O`, only ONE HYDROGEN is replaced by deuterium and HENCE it is mono basic.
Discussion
18.

What is meant by the term auto-protolysis of water ?

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Solution :Auto-protolysis of water means self ionization of water. In other words, TWO molecules of water react with each other through proton transfer, i.e., one acts as the ACID while the other acts as the base. The molecule which accepts a proton is CONVERTED into `H_(3)O^(+)` ion while that which loses a protonis converted into `OH^(-)` ion. Thus.
`underset("Acid"_(1))(H_(2)O(l))+underset("Base"_(2))(H_(2)O(l)) HARR underset("Acid"_(2))(H_(3)O^(+)(aq))+ underset("Base"_(1))(OH^(-)(aq))`
Discussion
19.

Which ofthe statements are false?

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Physical quantity REPRESENTED by volume is `dm^(3)`
The length of PENCIL is `5 "CMS"`.
The work done by a system is 5 Joules.
Air sometimes is considered as a hetrogeneous mixture due to the PRESENCE of dust particles which form a SEPARATE phase.

Solution :`implies 5 cm` (not cms)
`implies 5` joules (not Joules)
Discussion
20.

Which of the following is the most stable carbocation .

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Solution :STABILITY of alkyl CARBOCATION `3^(º) GT 2^(º) gt 1^(º)`
Discussion
21.

Write IUPAC names of the products obtained by the ozonolysis of the following compounds: (i) Pent-2-ene (ii) 3,4-Dimethyl-hept-3-ene (iii) 2-Ethylbut-1-ene (iv) 1-Phenylbut-1-ene

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SOLUTION :
Discussion
22.

The term Vander Waals forces refers to A) Dipole -- dipole interaction "" B) Dipole - induced dipole C) Dispersion forces

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A,C 
B,C 
A, B 
A,B,C 

SOLUTION :Vanderwaal.s = LONDON, DIPOLE - dipole and dipole induced dipole.
Discussion
23.

Which of the following statements about photochemical smog is wrong?

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It has high concentration of oxidising agents
It has low concentration of oxidising agent.
It can be CONTROLLED by controlling the release of `NO_2`, hydrocarbons, ozone, etc
Plantation of some plants like pinus HELPS in controlling photochemical SMOG

Solution :Photochemical smog is oxidizing in NATURE because it contains LARGE concentration of oxidizing agents `NO_2` and `O_3`
Discussion
24.

The value of equilibrium constant depends on what ?

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SOLUTION :The VALUE of equilibrium constant depends upon (i) NATURE of the REACTION (ii) TEMPERATURE.
Discussion
25.

Which dicarboxylic acid gives AcOH on stron heating ?

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Ethanedioic acid
Malanoic acid
Gluteric acid
Butane-1, 4-dioic acid

Solution :
Discussion
26.

Which of the following alkenes on treatment with HBr in presence or absence of peroxide give the same product?

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Cyclohexene
But-2-ene
Hex-3-ene
Ethene

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

Which amog the followng statements is/are correct?

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`Phi^(2)` represents the ATOMIC orbitals
The number of peaks in radial DISTRIBUTION is `(n-l)`
Radial probability density `rho_(NL)(r)=4pir^(2)R_(nl)^(2)(r)`
A NODE is point in SPACE where the wave function `(Phi)` has zero amplitude.

Answer :A::B::C::D
Discussion
28.

why are reversible process non-static ?

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Solution :In reversible processes, the RATE of two opposing reactions equals at a PARTICULAR stage. At this stage the conentration of reactants and products do not change with time. This condition is not STATIC and is dynamic, because both the FORWARD and reverse reactions are STILL occurring with the same rate .
Discussion
29.

Which one is correc for H_(2)O at 25^(0)C

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Ionic PRODUCT of water `K_(w) = 10^(-14)`
Equilibrium constant for dissociation of water `(Kc = 1.8 xx 10^(-16))`
Autoprotolysis constant of water `(k = 3.2 xx 10^(-) xx 10^(18))`
`K_(w)` increases with RISE in temperature

Solution :`H_(2)O hArr H^(+) + OH^(-)`
`K_(C) = ([H^(+)][OH^(-)])/([H_(2)O]) = (10^(-7) xx 10^(-7))/(55.55) = 1.8 xx 10^(-16)`
Discussion
30.

When sodium peroxide is treated with dilute H_(2)SO_(4), we get

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SODIUM sulphate and water
sodium sulphate and oxygen
sodium sulphate, hydrogen peroxide, oxygen
sodium sulphate and hydrogen peroxide

Solution :`Na_(2)O_(2)+H_(2)SO_(4) rarr Na_(2)SO_(4)+H_(2)O_(2)`
Discussion
31.

Which solution has the lower freezing point ? 10 g of methanol ( CH_3 OH_)in 100 g of water ( or ) 20 gof ethanol(CH_2 H_5OH)in 200 g of water

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Solution :`Delta T _(f) = K _(f), m.i.e. Delta T_(f) prop m`
`m_(CH_(3)-OH)= (((10)/(32)))/(0.1) = 3. 125m`
`m _(C_(2)H_(5)-OH)= (((20)/(46)))/(0.2)= 2. 174 m`
`therefore` Depression in freezing point is more in methanol solution and it will have lower freezing point.
Discussion
32.

What is the trade name of Benzene Hexachloride?

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SOLUTION :GAMMAXANE.
Discussion
33.

When ethyl iodide is allowed to reacts with sodium phenolate the product formed is

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Phenetole
Phenolate
Ethylbenzene
Ethylphenol

Solution :
Discussion
34.

What are the limitations of the thermodynamics?

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Solution :(i)Thermodynamics suggests feasibility of REACTION but FAILS to suggest rate of reaction. It is concerned only with the initial and the final STATES of the system. It is not concerned with the path by which the change occurs
(ii) It does not reveal the mechanism of a process
Discussion
35.

Which of the following will not show defection from the path on passing thorugh an electric field ? Proton, cathode rays, electron, neutron

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Solution :Neutron is a neutral PARTICLE. HENCE, it will not be deflected on PASSING through an ELECTRIC FIELD.
Discussion
36.

What are silicons ?

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Solution :SILICONSARE synthetic organosilicons compoundscontaining repeated UNITS held by `Si-O-Si`LINKAGES. They are hydrophobic (water-repellent) is nature.
Discussion
37.

Which of the following statement is false

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Every solid SUBSTANCE can be brought into colloidal state
Colloidal particles caryy electrical charges
Every solid substance can be made to behave like a lyophilic colloid
Addition of electrolytes CAUSES FLOCCULATION of colloidal particles

Answer :C
Discussion
38.

Which of the following reagent will convert glycerol to acrolein ?

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<P>`P_(2)O_(5)`
CONC. `H_(2)SO_(4)`
`KHSO_(4)`
All the three

Solution :
Discussion
39.

Which of the following boils at higher temperature ?

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`"CCI"_(4)`
`CO_(2) `
`C_(6)H_(12)O_(6)`
KCI

Answer :D
Discussion
40.

What type of forces do exist between the molecules of alkanes in liquid and solid states ?

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SOLUTION :VAN DER WAALS. FORCES
Discussion
41.

The standard Gibbs energy change at 300 K for the reaction 2 A hArrB+ C " is"2494 *2 J At a given time, the composition of the reaction mixture is [A] =1/2 , [B] =2 and [C] =1/2 . The reaction proceeds in the : [R=8*314 J//K//mol, e=2*718]

Answer»

Forward direction because `Q gt K_(C)`
Reverse direction because `Q gt K_(c)`
Forward direction because `Q lt K_(c)`
Reverse direction because `Q lt K_(c)`

Solution :`Delta G^(@) = -2*30" RT "logK_(c)`
` 2494.2 = - 2*303 (8.314) (300) log K_(c)`
orlog `K_(c) =-0*4342`
or `K_(c)= "antilog" (bar 1*5658) = 0*3679`
Now , when `[A] =1/2, [B] = 2 and [C] = 1/2`
`Q_(c)= ([B][C])/([A]^(2)) = (2xx1/2)/((1/2)^(2))=4`
As `Q_(c) gt K_(c),` reaction will proceed in the reverse direction.
Discussion
42.

Tugsten has a density of19.35 " g cm"^(-3)and the length of the side of the unit cell of 316 pm. The unit cell in the most important crystalline from of tungsten is the body centred cubic unit cell. How many atoms of the element does 50g of the element contain ?

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ANSWER :2,i.e, BCC
Discussion
43.

What is the general valence shell electronic configuration of group 14 elements ?

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SOLUTION :`ns^(2)np_(x)^(1)np_(y)^(1)np_(Z)^(0)`
Discussion
44.

Which type of 'defect' has the presence of cations in the interstitial sites ?

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SCHOTTKY defects
VACANCY DEFECT
Frenkel defect
Metal DEFICIENCY defect

Solution :When cation shifts from lattice to interstitial site, the defect is CALLED Frenkel defect
Discussion
45.

When the molar concentrations of SO_(2), O_(2) and SO_(3)at equilbrium at certain temperature are 0.5 , 0.25& 0.25 M respectively, k_(c)for 2SO_(3) hArr 2SO_(2) + O_(2) is

Answer»

`0.5 lit MOL^(-1)`
`1 lit^(2)-mol^(-2)`
`1 mol-lit^(-1)`
`0.25 mol^(2)-lit^(-2)`

SOLUTION :`2SO_(3(G)) harr 2SO_(2(g)) +O_(2(g))`
`K_(c)=([SO_(2)]^(2)[O_(2)])/([SO_(3)]^(2))`
Discussion
46.

Whichof thefollowing isusedin qualiitiveas wellas quantitiveanalysis ?

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`NACL`
`Na_(2)CO_(3)`
`NaHCO_(3)`
`CO_(2)`

ANSWER :B
Discussion
47.

Which of the following radial distribution graphs correspond to l=2 the H-atom-

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ANSWER :C
Discussion
48.

Which of the following oxides behaves as conductor or insulator depending upon temperature ?

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TIO
`SiO_(2)`
`TIO_(3)`
MgO

Answer :D
Discussion
49.

Those stereoisomers are called configurational isomers if they differ in spatial arrangement of atom or group and are not interconvertible without cleaving a bond. Geometrical isomer arises due to restricted rotation about a bond or centre. The number of G.I is 2^(n) where n= number of stereoisomers, in some cases the number of G.I is less than 2^(n) in case where either side nomenclature will be possible. The number of G.I. of the compound C_(2)H_(5)-CH=CH-CH=CH-CH=CH-CH_(3) is

Answer»




SOLUTION :TRANS STABLE than CIS
Discussion
50.

Which of the following when reaction occur in present of catalyst ?

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ACTIVATION ENERGY decreases.
Activation energy increases.
Equilibrium CONSTANT increase.
Equilibrium constant decrease.

Answer :A
Discussion