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 are the correct IUPAC names of the following compound?

Answer»

5 - Butyl -4- isopropyldecane
5 - Ethyl -4- propyldecane
5 - SEC - Butyl -4- ISO - propyldecane
4 - (1- methylethyl) -5- (1- methylpropyl) - decane

Answer :C::D
Discussion
2.

Which of the following is a Bronsted neutralisation reactions?

Answer»

`H^(+)+OH^(-)to H_2O `
` HCl +NH_3 to NH_4^(+)+Cl^(-)`
` NH_3+BF_3 to [H_3N to BF_3]`
` Na OH +HCl to NaCl + H_2O `

SOLUTION :`H^(+)` TRANSFER is called bronsted NEUTRALISATION
Discussion
3.

What is the inductive effect? Which one of the following shows maximum hyper cojugation effect? CH_(3)CH=CH_(2)"" (CH3)_(2)=C=CH_(2)"" CH_(2)=CH_(2)

Answer»

Solution :The percentage displacement of bonded sigma ELECTRONS along the CHAIN the carbon atoms due to the presence of a substitutent group of different electronegativitgy is called inductive effect.
`(CH_(3))_(2)C=CH_(2)`
Discussion
4.

WhichimportantpropertydidMendeleev use toclasify the elements in hisperiodictableand didhe stick tothat ?

Answer»

SOLUTION :Mendeleevusedatomicweightas thebasisof classification ofelementsin theperiodictable. He arrangedthe thenknownelementsin ORDEROF increasingatomicweigths groupingtogetherelements notknownat THATTIME. Forexamplethe ELEMENT galliumafteraluminiumandgermanium aftersilicon werenot known at thetimeMendeleevpreparedhisperiodictable. He calledtheseelementsas EKA- aluminium and ekasilicon. Latertheseelementswerediscoveredand theirpropertieswerefound to besimilarto thosepredictedby Mendeleev.
Discussion
5.

The species having bond angle of 120^(@) is

Answer»

`PH_(3)`
`ClF_(3)`
`NCl_(3)`
`BCl_(3) `

Solution :In `BCl_(3)` , B is `sp^(2)` -HYBRIDIZED giving a PLANAR
STRUCTURE having a bond angle of `120^(@)` . All other
molecules have bond angle LESS than `120^(@)` .
Discussion
6.

Which of the given elements will gain one electron more readily in comparison to other elements of their group-

Answer»

`S`
`NA`
`O`
`CL`

ANSWER :A::D
Discussion
7.

When 1 mole of C_(2)H_(6)(g)at 27^(@)C is burnt completely in some oxygen gas at 27^(@)C At constant pressure, CO_(2)(g),CO(g)and H_(2)O(g) are produce at 327^(@)C. the surropundings. The standard enthaplies of formation of C_(2)H_(6)(g).CO(g) and H_(2)O(g) are -40, -90, -30 and -60kcal//mol respectively. The molor heat capacities at constant pressure ofCO_(2)(g),CO(g) and H_(2)O (g) are 7.0,6.0 and 9.0cal//Kmol, respectively. The molar hear capacities at constnt pressure of CO_(2)(g),CO(g) and H_(2)O (g) are 7.0,6.0 and 9.0 cal//K-mol respectively.On the basis of these informations, math teh valuesof column-I with the quantities represented in column-II Assume Delta_(r)H independent of temperature. {:(,"Column-I",,"Column-II"),((a),1.0,(p),Delta_(r)H "of reaction" : 2C_(2)H_(6)(g) + 7O_(2)(g)rarr 4CO_(2)(g)+6H_(2)O(g),"is"),((b),-200"kcal",(q),Delta_(r)H"of reactIon":C_(2)H_(6)(g)+(5)/(2)O_(2)(g)rarr2CO(g)+3H_(2)O(g)"is"),((C),-3600"cal",(r),"moles of CO formedis"),((d),-640kcal,(s),"Moles of CO_(2)formed is"),(,,(t),"Work done by the system is") :}

Answer»


ANSWER :`(a-r, s);(b-q);(c-t);(d-p)`
Discussion
8.

Which of the following structures is enantiomeric with the molecule (A) given below?

Answer»




ANSWER :A
Discussion
9.

The uncertainty in the momentum of a particle is 3.31 xx 10^(-2) kgms^(-1). The uncertainity in its position is (in metres)

Answer»

`1.59xx10^(-33)`
`0.33xx10^(-30)`
`0.4xx10^(-20)`
`3.3xx10^(-24)`

ANSWER :A
Discussion
10.

Which of thefollowing species do not show disporoportionationreaction and why ? CIO^(-),CIO_(2)^(-),CIO_(3)^(-) and CIO_(4)^(-) Also write reaction for each of the species that disproportinates

Answer»

Solution :The oxidation STATE of CI in all the given species are `overset(+1)CIO, overset(+3)CIO, overset(+5)CIO_(3), overset(+7)CIO_(4)`
out of above species `CIO_(4)` does not undergo disproportionation since in this oxanion chloringis ALREADY present in the higherst oxidation state +7 and hence cannot be further oxidation
all the remaing oxanotion have oxdation states LOWER undergo disproportion reaction as shown below
`3overset(+1)CIOrarr2overset(-1)CI+overset(+5)CIO_(3),overset(+3)CIO_(2)rarr2CIO_(3),4CIO_(3)^(-)rarr3 CIO_(4)^(-)`
Discussion
11.

Which of the following pair of elements have same atomic radius

Answer»

B, AI
AL, Ga
Ga, In
B,TI

Answer :B
Discussion
12.

What are bio-degradable and non-biodegradable pollutants?

Answer»

SOLUTION :(i) The pollutants which can be easily DECOMPOSED by the natural biological processes are called biodegradable pollutants. For example plant wastes, ANIMAL wastes.
(ii) The pollutants which cannot be decomposed by the natural biological processes are called non-biodegradable pollutants. For example, METAL wastes such as HG and Pb, D.D.T. plastics. nuclear wastes
Discussion
13.

Which of the following concentration terms is/are affected by a change in temperature ?

Answer»

MOLARITY
Molality
Mole fraction
Weight fraction

SOLUTION :Molarity is TEMPERATURE DEPENDENT because it involves volume of the solution.
Discussion
14.

What type of hybridisations are possible in the following geometeries ? (a) octahedral (b) tetrahedral (c ) square planar

Answer»

Solution :(a) OCTAHEDRAL GEOMETRY is possible by `sp^(3)" "d^(2) (or) d^(2)" "sp^(3)` hybridisation.
(B) Tetrahedral geometry is possible by `sp^(3)` hybridisation.
(c) Square planar geometry is possible by `dsp^(2)` hybridisation.
Discussion
15.

Which has maximum number of molecules among the following?

Answer»

44 g of `CO_(2)`
48 g of `O_(3)`
8 g of `H_(2)`
64 g of `SO_(2)`

Solution :No. of MOLES of `CO_(2)=((44g))/(("44 g mol"^(-1)))=1` mol
No. of moles of `O_(3)=((48G))/(("48 g mol"^(-1)))=1`mol
No. of moles of `H_(2)=(8G)/(("2g mol"^(-1)))=4` mol
No. of moles of `SO_(2)=((64G))/(("64g mol"^(-1)))=1` mol
`:.` 4 moles or 8g of `H_(2)` have max. no of molecules.
Discussion
16.

What is the difference between ground state and excited state ?

Answer»

SOLUTION :Ground state means the LOWEST energy state. When the electrons absorb energy and jump to outer orbits. This state is CALLED excited state.
Discussion
17.

Which are the correct IUPAC names of the following compound ? {:(""HC(CH_(3))_(2)),("|"),(H_(3)C-CH_(2)-CH_(2)-CH-CH-CH_(2)-CH_(2)-CH_(2)-CH_(2)CH_(3)),("|"),(""H_(3)C-CH-CH_(2)-CH_(3)):}

Answer»

5-Butyl-4-isopropyldecane
5-Ethyl-4-propyldecane
5-sec-Butyl-4-iso-propyldecane
4-(1-methylethyl)-5-(1-methylpropyl)-decane

Solution :The compound has the longest chain of 10 carbon atoms. Sides chains are on `4^(th)` and `5^(th)` carbon atoms according to lowest SUN rule. On `C_(4)`, there is isopropyl group, and on `C_(5)`, sec-butyl group, In IUPAC SYSTEM, isopropyl is named as 1-Methylethyl group sec-Butyl group NAMES as 1-Methylpropyl group. Hence, the names of organic compound are
(C) 5-sec-Butyl-4-iso-propyldecane
(D) 4-(1-methylethyl)-5-(1-methylpropyl)-decane
Discussion
18.

Which of the following is a state function?

Answer»

Q
`DELTAQ`
W
`DELTAS`

ANSWER :D
Discussion
19.

What are the mojor differece between metals and non metals ?

Answer»

SOLUTION :Metals are electropositive (lower IE) element with LESS negative electron gain enthalpies. They are good reducing AGENTS which from BASIC oxide and inoic COMPOUNDS. Non metals are electronegative (high IE) elements with more nagative electron gain enthalpies.
Discussion
20.

What is Sabatier - Sendersens reaction?

Answer»

Solution :The process of additionof `H_2 `to unsaturatedcompounds( alkenesoralkynes) in knownas hydrogenation . Theaboveprocesscan becataysedbynikelat 298K .This reactionis knownassabatier -sendersensreactionfor EXAMPLE :
` overset("( Ethene)") (CH_2 = CH_2 +H_2 )underset(298 K ) overset( NI)tounderset("(ETHANE )") (CH_3 -CH_3)`
Discussion
21.

Using van der Waal's equation calculate the constant 'a' when 2 mole of a gas confined in a 4 L flask exerts a pressure of 11.0 atm at a temperature of 300 K. The value of 'b' is 0.05 L mol^(-1).

Answer»

SOLUTION :`6.49 ATM L^(2) MOL^(-2)`
Discussion
22.

Which one of the following causes cancer?

Answer»

1, 2-Benzpyrene
n-Hexane
2-Butene
CYCLOHEXANE

ANSWER :A
Discussion
23.

Which of the following compounds ae correctly related

Answer»

`{:("Compound","use"),(MgSO_(4)*7H_(2)O,"MORDANT in dying fabrics"):}`
`{:("Compound","use"),(Ca(H_(2)PO_(4))_(2),"Soluble PHOSPHATE fertilizer"):}`
`{:("Compound","use"),(BaSO_(4),"paint pigment"):}`
`{:("Compound","use"),(Mg(OH)_(2),"Milk of megnesia"):}`

Solution :All are CORRECT explanations
Discussion
24.

Whodiscoveredprotonand neutron ?

Answer»

SOLUTION :PROTON DISCOVEREDBY Goldstinin 1886
NEUTRON discoveredby Chadwickin 1932.
Discussion
25.

The speed of an electron in the inner most orbit of the hydrogen (Bohr radius = 52.9 pm, me = 9.11 xx 10^(-31) kg) is

Answer»

`2.19x10^(14)m.s^(-1)`
`2.19xx10^(6)m.s^(-1)`
`2.19xx10^(7)m.s^(-1)`
`2.19xx10^(8)m.s^(-1)`

ANSWER :B
Discussion
26.

The solubility product constants of Ag_(2)CrO_(4) and AgBr are 1.1xx10^(-12) and 5.0xx10^(-13) respectively. Calculate the ratio of molarities of theirsaturated solutions.

Answer»


SOLUTION :CALCULATE their SOLUBILITIES SEPARATELY and then calculate the RATIO.
Discussion
27.

Which one of the following has both ionic and covalent bond ?

Answer»

`CH_(4)`
KCN
`O_(2)`
KCl

Answer :B
Discussion
28.

Which of the following is insoluble in water?

Answer»

LiF
NaCl
KB
NaBr

ANSWER :A
Discussion
29.

What is called as inorganic benzene ?

Answer»

Solution :BORAZINE `(B_(3)N_(3)H_(6)`)
Discussion
30.

How much minimum volume of CO at STP is needed to react completely with 0.112 L of O_(2) at 1.5 atm. Pressure and 127^(@)C to give CO_(2).

Answer»

Solution :Carbonmonoxide isoxidised in oxygen to give CARBON dioxide
`2CO+O_(2)rarr2CO_(2)`
1 mole of `O_(2)` = 2 moles of CO
1 volume of ` O_(2)` = 2 volumes of CO
0.112L `O_(2)` at STP = 0.224L CO at STP
STP conditionsGiven conditions
`P_(1)=1atm""P_(2)=1.5atm`
`T_(1)=273K""T_(2)=400K`
`V_(1)=0.224L""V_(2)=?`
Volume of carbonmonoxide needed in the given conditions `=V_(2)= (P_(1)V_(1))/(T_(1))XX(T_(2))/(P_(2)) = (1xx0.224xx400)/(273xx1.5) =229.3 L`
Discussion
31.

Whichof the following compounds is most acidic ?

Answer»



`CH_(3)CH_(2)OH`
`CH_(3)-UNDERSET(OH)underset(|)(CH)-CH_(3)`

SOLUTION :Phenols are more acidic than ALCOHOLS.
Discussion
32.

Various oxidation states of few elements are mentioned. Which of the options is not correctly matched ?

Answer»

a. Phosphorus: +3 to +5
b. NITROGEN : +1 to +5
c. IODINE : -1 to +7
d. Chromium : +3 to +6

Solution :Chromium does not SHOW negative oxidation state.
Discussion
33.

Which reaction yields Bakelite ?

Answer»

Urea with `HCHO`
TETRAMETHYL glycol with Hexamethylene diisocyanate
Phenol and `HCHO`
ETHYLENE glycol and Dimethylterephthalate

Solution :`nC_(6)H_(5) - OH + nHCHO OVERSET(OH^(-))rarr`
Discussion
34.

Which of the following does not form a pentachloride?

Answer»

P
As
Sb
N

Answer :A::B::C::D
Discussion
35.

What isthe angularmomentumof electron in 5^(th) orbitof Bohr.smodel

Answer»

`1.0 (h)/(pi)`
`10.(h)/(pi)`
`2.5.(h)/(pi)`
`25.(h)/(pi)`

Solution :ANGULARMOMENTUM`=(NH)/(2pi)`
Discussion
36.

The shape of colloidal particles is:-

Answer»

SPHERE like
Rod like
Disc like
All of these

Answer :D
Discussion
37.

which of the following is /are correct?

Answer»

In (HCP) unit cell, the total number of octahedral voids is 4.
The third nearest neighbour of `Na^(+)` in `NaCl` is `8Cl^(-)` ions .
The rank of ZNS unit cell is four (4).
The (hcp)unit cell the total number of TETRAHEDRAL void is 12.

Answer :B::C::D
Discussion
38.

When treated with conc. HNO_(3) aluminium is rendered "………….." due to the formation ofprotective layer of its "………….." on the surfaceof the metal.

Answer»


ANSWER :PASSIVE, OXIDE
Discussion
39.

Which law shows density and pressure ?

Answer»

Boyle.s
Charle.s
Avogadro.s
Dalton.s

Answer :A
Discussion
40.

Write the lewis dot structure of CO_(3)^(2-) molecule.

Answer»

SOLUTION :
Discussion
41.

The system would required ……………… heat to effect a given temperature rise than at constant volume .

Answer»

less
more
small
lower

Answer :B
Discussion
42.

Which one of the following relations is correct with respect to first (I) and second (II) ionisation potentials of Na and Mg?

Answer»

`I_(NA) GT I_(MG)`
`I_(Mg) = II_(Na)`
`II_(Mg) gt II_(Na)`
`II_(Na) gt II_(Mg)`

ANSWER :D
Discussion
43.

Which halogen element is obtained from sea weeds ?

Answer»

`Br_2`
`I_2`
`F_2`
`Cl_2`

ANSWER :B
Discussion
44.

Write the resonance structures of CH_(2)=CH-CHO. Indicate relative stability of the contributing structures order of decreasing stability.

Answer»

Solution :
STRUCTURE (I) is most stable since both C and O atom has an octet of ELECTRONS and none of these atoms carries any charge. Structures (II and III) both involve SEPARATION of charge and HENCE both are less stable than structure (I). However, structure (II) is more stable than structure (III) since it carries a -ve charge on the more electronegative O atom and +ve charge on the less electronegative (C) atom while is structure (III), the more electronegative O atom carries the +ve charge while the less electronegative C atom carries the -ve charge. THUS, the decreasing order of stability is : `I gt II gt III`
Discussion
45.

What is the difference in pH when adding of common ion (conjugate base) in weak acid ?

Answer»

SOLUTION :INCREASE in PH.
Discussion
46.

Which alcohol is prepared from the following ketones via MPV reduction ?

Answer»


ANSWER :`(##RES_CHM_ROHR_E03_104_A01##)`
Discussion
47.

What is a spontaneous process? Write the criteria for spontaneity of a process in terms of DeltaG.

Answer»

SOLUTION :A PROCESS which take splace on its own WITHOUT any EXTERNAL AID.
`DeltaG=-Ve`
Discussion
48.

Which compound amongst the following is nitrated with most difficulty ?

Answer»

nitrobenzene
m-dinitrobenzene
phenol
quinol

Answer :B
Discussion
49.

Two acids A and B titrated separately each time with 25 mL of N Na_(2)CO_(3) solution and require 10 mL and 40 mL respectively for complete neutralisation. What volume of A and B would you mix to produce one litre of normal acid solution ?

Answer»


SOLUTION :N//A
Discussion
50.

What leads to the development of electron microscope?

Answer»

The FINDING of velocity of electron
The finding of particle NATURE of electron
The finding of wave nature of electron
NONE of these above

Answer :C
Discussion