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 statement about the electron is incorrect ?

Answer»

It is a NEGATIVELY charged particle
The mass of electron is EQUAL to the mass of neutron
It is a basic constituent of all atoms
It is a constituent of CATHODE rays

Solution :The mass of electron is very very small as compared to the mass of the neutron
Discussion
2.

Thermodynamics mainly deals with

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interrelation of various forms of energy and their transformation from one formto another.
energy changes in the processes which depend only on initial and final statesof the MICROSCOPIC system containing a few molecules.
how and at what RATE these energy transformations are carried out.
the system in equilibrium STATE or moving from one equilibrium state to another equilibrium state.

SOLUTION :Thermodynamics deals with (a) and (b)and not with (b) and(c ) .
Discussion
3.

Which of the following ions exhibit resonance ?

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`NO_(3)^(-)`
`CH_(3)COO^(-)`
`CO_(3)^(-2)`
All of the above

Solution :All the given IONS show RESONANCE due to CONJUGATION
Discussion
4.

Which one is green house gas ?

Answer»

`CH_4`
`O_3`
`CFCS`
All of these

Solution :All of these
Discussion
5.

Which nitrate will decompose to give NO_(2) on heating?

Answer»

`NaNO_(3)`
`KNO_(3)`
`RbNO_(3)`
`LiNO_(3)`

SOLUTION :Only `LiNO_(3)` gives `NO_(2)` on HEATING. All other nitrates given oxygen. ,brgt `4LiNO_(3)overset(Delta)to 2Li_(2)O+4NO_(2)+O_(2)`
`2NaNO_(3)+ overset(Delta)to 2NaNO_(2)+O_(2)`
Discussion
6.

Which of the following represents the correct IUPAC name for the compounds concerned? 2,4,7-Trimethyloctane or 2,5,7-Trimethyloctane

Answer»


ANSWER :2,4,7-Trimethyloctane
Discussion
7.

Which of the following belongs to the homologous series of C_(5)H_(8)O_(2)N?

Answer»

`C_(6)H_(10)O_(3)N`
`C_(6)H_(8)O_(2)N_(2)`
`C_(6)H_(10)O_(2)N_(2)`
`C_(6)H_(10)O_(2)N`

Answer :D
Discussion
8.

Which among the following is not an exact differential?

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Q (dQ= heat absorbed)
U(DU = change in internal ENERGY)
S(dS = entropy change)
G(DG= Gibbs free energy change)

Solution :Q is a path FUNCTION
Discussion
9.

What is the oxidation number of phosphorous in calcium phosphide ?

Answer»

<P>`-5`
`-3`
`+5`
`+3`

Solution :`Ca_(3)P_(2)rArr3(CA)+2(x)=0`
`therefore3(+2)+2(x)=0`
`therefore2x=-6" "thereforex=-3`
Discussion
10.

When 20.0 g of ammonium nitrate( NH_(4)NO_(3)) is dissolvedin 125g of waterin a coffee-cup calorimeter, the temperature fallsfrom 296.5 K to 286.4K. Findthe value of q for the calorimeter. (Treat heat capacityof water as the heat capacityof the calorimeter and its contents) .

Answer»


SOLUTION :As heatcapacity of water `=` heat ( capacityof CALORIMETER , the heat gained by water `=` heatlost bythe calorimeter
`125xx ( 296.5 - 286.4) XX 4.18 J= 5282J = 5.282J`
Discussion
11.

Which sequence for green house gases is truely based on GWP?

Answer»

`CFC GT N_2 O gt CO_2 gt CH_4`
`CFC gt N_2 O gt CH_4 gt CO_2 `
`CFC gt CO_2 gt N_2 O gt CH_4`
`CFC gt CH_4 gt N_2 O gt CO_2`

SOLUTION :`CFC gt N_2 O gt CH_4 gt CO_2 `
Discussion
12.

Write the relatioship between K_(sp) and S of BaSO_(4) and AgCl.

Answer»

Solution :Both `BaSO_(4)` and AgCl belong to AB type of salts.
(a) Let the solubility of AgCl be S MOL `DM^(-3)`
`AgCl_((s))hArrAg_((aq))^(+)+Cl_((aq))^(-)`
`[Ag^(+)]=S" mol "dm^(-3)and[Cl^(-)]=S" mol "dm^(-3)`
`thereforeK_(sp)=[Ag^(+)][Cl^(-)]=S*S=S^(2)`
(B) Let the solubility of `BaSO_(4)` be S mol `dm^(-3)`
`BaSO_(4(s))hArrBa_((aq))^(2+)+SO_(4(aq))^(2-)`
`[Ba^(2+)]=S" mol "dm^(-3)and[SO_(4)^(2-)]=S" mol "dm^(-3)`
`thereforeK_(sp)=[Ba^(2+)]*[SO_(4)^(2-)]=S*S=S^(2)`
Discussion
13.

What will be happened when organic compound fusion with sodium metal?

Answer»

Solution :The conversion of N, S, X in COVALENT bond to IONIC bond COMPOUND
Discussion
14.

The velocity of an electron in a certain Bohr.s orbit of H-atom bears the ratio 1:275 to the velocity of light. Then find the quantum number (n) of orbit ?

Answer»


ANSWER :2
Discussion
15.

Which of the following alkenes is most reactive towai cationic polymerization?

Answer»


ANSWER :C
Discussion
16.

Which of the following is according to Boyle's law?

Answer»




ANSWER :D
Discussion
17.

Which oneof the following binary liquid mixtures exhibits positive deviation from Raoults law?

Answer»

Acetone + CHLOROFORM
WATER + nitric acid
HCl + water
ETHANOL + water

ANSWER :D
Discussion
18.

Which one of the following is not used for the purification of solid impurities ?

Answer»

Distillation
Sublimation
Crystallistion
Vapouristataion

Answer :d
Discussion
19.

The structure of sodium chloride crystal is:

Answer»

body centred cubic LATTICE
FACE centred cubic lattice
octahedral
square planar

ANSWER :B
Discussion
20.

Which of the following is/are correct

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SOLUTION :Option A and B are correct.
But in option (C) and (D) `CH_(3)-OVERSET(O)overset(||)(C)_(o+)` is ELECTROPHILE.
Discussion
21.

Which type of force present between HCl and O_(2) molecules ?

Answer»

London
DIPOLE - Dipole
Dipole - INDUCE dipole
POLAR - Polar

ANSWER :C
Discussion
22.

Which of the following products may be formed by the reaction of diborane with ammonia/

Answer»

`(BN)_(X)`
`B_(2)H_(6).2NH_(3)`
`B_(3)N_(3)H_(6)` show ADDITION reaction and produce `B_(3)N_(3)H_(9)Cl_(3)` in about which `CL` is bonded to boron
`B_(2)H_(6).NH_(3)`

Answer :A::B::C
Discussion
23.

Which compound (s) will show the geometrical isomerism?

Answer»




SOLUTION :N//A
Discussion
24.

Which of the following is not an non-ideal solution showing negative deviation?

Answer»

PHENOL and ANILINE
ETHANOL and WATER
acctone+Chloroform
n-Heptane and n-Hexane

Answer :D
Discussion
25.

Which of the following compounds has correct IUPAC name?

Answer»

`CH_(3) - CH_(2) - CH_(2) - COO- CH_(2) CH_(3) RARR` butanal
`CH_(3) - UNDERSET(underset(CH_(3))(|))(CH) - CH_(2)- CHO rarr` 3-methyl-3-butanol
`CH_(3)- underset(underset(OH)(|))(CH) - underset(underset(CH_(3))(|))(CH) - CH_(3) rarr` 2-methyl-3-butanol
`CH_(3) - underset(underset(CH_(3))(|))(CH) - OVERSET(overset(O)(||))(C )-CH_(2)- CH_(3) rarr` 2-methyl-3-pentanone

Answer :D
Discussion
26.

What is Troposphere ?

Answer»

SOLUTION :Throughout our life we REMAIN immersed in the ocean of air which is a mixture of GASES. We spend our life in the LOWERMOST layer of the atmosphere called .troposphere..
Discussion
27.

What would be the consequence of presence of following in water ? (i)Sulphates gt 500 ppm (ii)Fluorides between 2 ppm -10 ppm gt 10 ppm (iii)Nitrates gt 50 ppm

Answer»

Solution :(i)Sulphates GT 500 PPM have laxative effect
(ii)Fluorides gt 10 ppm cause brown MOTTLING of TEETH
Fluorides gt 10 ppm are harmful to bones and teeth
(iii) Nitrates gt 50 ppm cause methemoglobinemia (blue baby syndrome)
Discussion
28.

Which of the following has highest conductivity in aqueous solution ?

Answer»

`LI^(+)" ion"`
`Cs^(+)" ion"`
`NA^(+)" ion"`
`K^(+)" ion"`

ANSWER :B
Discussion
29.

When n=3 and l=1, the designation given to the orbital is

Answer»

4s
4p
3s
3p

Answer :D
Discussion
30.

Which of the following are the ores of lead ?

Answer»

GALENA
Cassiterite
Anglesite
CERUSSITE

Solution :Galena, PBS
Cassiterite, `SnO_(2)`
Anglesite, `PbSO_(3)`
Cerussite `PbCO_(3)` (white LEAD ore)
Discussion
31.

Which of the following statements is false regarding alkali metals ?

Answer»

ALKALI metals are soft and can be cut with the help of knife
Alkali metals do not occur in FREE state in NATURE
Alkali metals are highly ELECTROPOSITIVE
Alkali metal hydrides are covalent in character

Solution :Alkali metal hydrides are ionic in character .
Discussion
32.

Write the IUPAC names of the following substituted benzene derivatives:

Answer»

SOLUTION :(a) 1, 4-Dimethylbenzene (B) 2, 4,6-Trinitrophenol (C ) 3-Phenyl-2-propenal
Discussion
33.

Which of the following structures is not correctly named according of IUPAC ?

Answer»




ANSWER :D
Discussion
34.

Usings,p,dfnotationsdescribethe orbitalwith thefollowingquantumnumber (a )n=2,l =1 ( b)n=4,l =0 (c ) n=5,l =3(d )n=3 , l= 2

Answer»

SOLUTION :
Discussion
35.

Which of the following pair of oxides is responsible for acid rain?

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`SO_(3)+NO_(2)`
`CO_(2)+CO`
`N_(2)O+CH_(4)`
`O_2+H_2`

ANSWER :a
Discussion
36.

When sodium hydroxide is added drop wise to a mixture of two compounds a white precipitate appears but on adding excess of NaOH the amount of precipitate decreases . Then the mixture contains

Answer»

NaOH and `FeSO_(4)`
`CuSO_(4)` and `Al_(2)(SO_(4))_(3)`
`AlCl_(3)` and `MnCl_(2)`
`ZnSO_(4)` and `SnCl_(2)`

Answer :C
Discussion
37.

Which of the following process is feasible at all temperatures?

Answer»

`DeltaH GT 0, DeltaS gt 0`
`DeltaH gt 0 , DeltaS lt 0`
`Delta H lt 0 , DeltaS gt 0`
`DeltaH lt 0 , DeltaS lt 0`

ANSWER :C
Discussion
38.

Two liquids (A) and (B) can be separated by the method of fractional distillation. The boiling point of liquid (A) is less than boiling point of Liquid (B). Which of the liquids do you expect to come out first in the distillate ? Explain

Answer»

Solution :The less boiling point containing liquid (A) comes first in the distillate.
Fractional distillation is used to separate the components of a mixture if their boiling points differ by `20^(@)` or less. In this method, a FRACTIONATING column is used in between the flask and the CONDENSER. The purpose of the fractionating column is to provide hurdles for the ascending vapours and to provide hurdles for the ascending vapours and to provide large surface area for condensing the high boiling liquid. As a result, the vapour of the LOW boiling liquid (A) will move up while these of the high boiling liquid will condense adn back into the flask. Therefore, in this method liquid (A) with lower boiling point will distil first and liquid (B) with HIGHER boiling point afterwards
Discussion
39.

What happened in hyperconjugation?

Answer»

Solution :The `SIGMA` ELECTRONS of C-H BOND is delocalized and the stability of MOLECULE or ion will be INCREASES
Discussion
40.

Which one of the following shows geometrical isomerism?

Answer»

n-Butane
1-butene
2-butene
butyne

Answer :C
Discussion
41.

Which of the following pairs of substance do not exhibit tautomerisms?

Answer»

propane-2-ol and prop-1-en-ol
Pent-2, 4-dione and pent-3-en-4-ol-2-one
3-methyl pentan-2-one and 3-methyl pentan-3-ol
eth-1-en-1-ol and ethanal

Solution :TWO options
(A) `underset("Propane-2-ol")(CH_(3)-underset(underset(OH)(|))(CH)-CH_(3))|underset("prop-1-en-ol")(HOCH=CH-CH_(3))`
These two are not TAUTOMERS
(B)`underset("pent-2, 4-dione KETO form")(H_(3)C- OVERSET(overset(O)(||))(C )-CH_(2)-overset(overset(O)(||))(C )-CH_(3))|underset("pent-3-en-4-ol-2-ono Enol form")(H_(3)C - overset(overset(O)(||))(C )-HC= overset(overset(OH)(|))(C )-CH_(3))`
(C ) `underset("3-methyl pentan-2-one")(H_(3)C- overset(overset(O)(||))( C)-overset(overset(CH_(3))(|))(CH)CH_(2)CH_(3))|underset("3-methyl pentan-3-ol")(H_(3)C-CH_(2)-underset(underset(CH_(3))(|))overset(overset(OH)(|))(C )-CH_(2)CH_(3))`
These two are not tautomers
(D) `underset("eth-1-en-ol Enol form")(H_(2)C=CHOH)| underset("Ethanal Keto form")(CH_(3)-underset(underset(O)(||))(C )-H)`
Discussion
42.

What is meant by Biochemical Oxygen Demand (BOD)? What is its significants?

Answer»

Solution :The amount of oxygen REQUIRED by bacteria to BREAK down the organic matter present in a certain VOLUME of a sample of water is CALLED Biochemical Oxygen Deman (BOD) The amount of BOD in the water is a measure of the amount of organic material in the water, in terms of hou MUCH oxygen will be required to break it down biologically.
Discussion
43.

Which of the following statement (s) is (are) not correct ?

Answer»

The shape of an ATOMIC orbital depends on the azimuthal quantum number
The ORIENTATION of an atomic orbital depends on the magnetic quantum number
The ENERGY of an electron in an atomic orbital of MULTI electron atom depends on principal quantum number
The number of degenerate atomic orbitals of one TYPE depends on the values of principal, azimuthal and magnetic quantum numbers.

Answer :C::D
Discussion
44.

XeF_(2) is isostructural with

Answer»

`SbCl_(2)`
`BaCl_(2)`
`TeF_(2)`
`ICl_(2)^(-)`

Solution :`XeF_(2)` is isostructural with `Icl_(2)^(-)`
Discussion
45.

What is the major product that will be formed in the following reaction ? CH_3-undersetunderset(CH_3)(|)oversetoverset(CH_3)(|)C-CH=CH_2+HCl to

Answer»

`CH_3-undersetunderset(CH_3)(|)oversetoverset(CH_3)(|)C-undersetunderset(CH_3)(|)CH-CH_3`
`CH_3-undersetunderset(CL)(|)oversetoverset(CH_3)(|)C-undersetunderset(CH_3)(|)CH-CH_3`
`CH_3-undersetunderset(CH_3)(|)oversetoverset(CH_3)(|)C-CH_2-CH_2-Cl`
`CH_3-undersetunderset(CH_3)(|)oversetoverset(CH_3)(|)C-undersetunderset(Cl)(|)CH-CH_2-CH_2-undersetunderset(Cl)(|)CH-undersetunderset(CH_3)(|)oversetoverset(CH_3)(|)C-CH_3`

ANSWER :B
Discussion
46.

Which of the following carbocation is expected to be most stable

Answer»




SOLUTION :`-NO_(2)` GROUP is benzene deactivator. It is META DIRECTING.
Discussion
47.

Which of the following reaction is endothermic reaction ?

Answer»

`CaCO_(3) to CaO+ CO_(2)`
`Fe+ S to FeS`
`NaOH + HCI to NaCI + H_(2) O`
`CH_(4) + 2O_(2) to CO_(2) +2H_(2) O`

Solution :Decomposition reaction is always ENDOTHERMIC reaction.
Discussion
48.

Thermite is a mixture of Fe_(2)O_(3) and

Answer»

Zn powder
Na - metal
K - metal
Al - powder

SOLUTION :3 : 1 RATIO of `.Fe_(2)O_(3).` and .Al. podwer.
Discussion
49.

The type of H-bonding and intra orthonitro phenol and -nitro phenol are ........... Respectively.

Answer»

INTER MOLECULAR H-bonding and INTRA molecular H-bonding
Intra molecular H-bonding and inter molecular H-bonding
Intra molecular H-bonding and no H-bonding
Intra molecular H-bonding and intra molecular H-bonding

SOLUTION :Intra molecular H-bonding and inter molecular H-bonding
Discussion
50.

Which is least acidic ? SbH_(3),PH_(3),NH_(3),AsH_(3) ?

Answer»

SOLUTION :A compound which is most basic is obviously LEAST acidic. SINCE `NH_(3)` is most acidic, THEREFORE, it is least acidic.
Discussion