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.

Tendency for catenation is strongest in:

Answer»

C
O
N
Si

Answer :A
Discussion
2.

Ten grams of a gas occupies 2 L at STP. At what temperature will the volume of the same quantity of a gas becomes double at the same pressure ?

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273K
`-273^(@)C`
546K
`546^(@)C`

Solution :`( V_(1))/( T_(1)) = (V_(2))/( T_(2))` (Charles. law)
`T_(2) = ( 4L xx 273)/( 2L) = 546K`
Discussion
3.

Ten grams of potassium chloride are dissolved in 10^(3) kg of solution, its strength may be expressed as

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1 PPM
10 ppm
100 ppm
1000 ppm

Solution :Ten grams are present in `10^(3)kg=1` MILLION gram
`:.` STRENGTH `=10` ppm
Discussion
4.

Ten grams of a fairly concentrated solution of cupric sulphate is electrolysed using 0.01 faraday of electricity. Calculate (i) the weight of the resulting solution and (ii) the number of equivalent of acid or alkali in the solution. (Cu = 63.5, F = 96500 coulombs)

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Solution :(i) Since mole of electric charge used = 0.01 F
`therefore` eq/ of Cu deposited = 0.01
`therefore` WT. of Cu deposited `= 0.01 xx 31.75 = 0.3175g`.
`("eq. wt. of Cu " = (63.5)/(2) = 31.75)`
Eq. of oxygen discharged = 0.01
`therefore` wt. of oxygen discharged `= 0.01 xx 8 = 0.08g`.
`("eq. wt. of Cu " = (16)/(2) = 8)`
Total loss in weight due to electrolysis = 0.3175 + 0.08
= 0.3975 g
`therefore` the weight of the resulting solution = 10 - 0.3975 = 9.6025 g.
(ii) Electrolysis of `CuSO_(4)` solutions follows through
`CuSO_(4) = Cu^(2+) + SO_(4)^(2-)`
At cathode : `Cu^(2+) + 2E^(-) RARR Cu`
At anode : `SO_(4)^(2-) + H_(2)O rarr H_(2)SO_(4) + (1)/(2)O_(2) uarr + 2e^(-)`
Thus `H_(2)SO_(4)` is produced during electrolysis.
`therefore` eq. of `H_(2)SO_(4)` produced = 0.01 (due to passage of 0.01 faraday)
Discussion
5.

Temporary hardness of water can be removed by

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ADDITION of potassium permanganate
Boiling
Filtration
Addition of chlorine

Solution :By boiling temporary hardness of water can be REMOVED.
`CA(HCO_(3))_(2) overset("Boil") underset("(insoluble)")(CaCO_(3))+H_(2)O +CO_(2)`
Discussion
6.

Temporary hardness may be removed from water by adding ?

Answer»

`CaCO_(3)`
`Ca(OH)_(2)`
`CaSO_(4)`
`HC l`

Answer :B
Discussion
7.

Temporary hardness in water is due to which one of the following of Calcium and Magnesium ?

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Hydrogencarbonates
Carbonates
Chlorides
Sulphates

Solution :Lithium reacts intensely with water , forming lithium hydroxide and highly FLAMMABLE hydrogen. The colourless solution is highly ALKALIC . The exothermal REACTIONS lastslonger than the reaction of sodium and water .
Discussion
8.

Temporary hardness is caused due to the presence of :

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`CaSO_4`
`CaCl_2`
`CaCO_3`
`CA(HCO_3)_2`

ANSWER :D
Discussion
9.

Temporary hardness is caused due to the presence of

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`CaCO_(3)`
`CaCl_(2)`
`CA(HCO_(3))_(2)`
`CaSO_(4)`

Answer :C
Discussion
10.

Temperature range used for the reduction of FeO by overall effect of the given reactions is related to which points shown in the adjacent graph. (i) C+O_(2)rarrCO_(2) (ii) 2C+O_(2)rarr2CO (iii) 2CO+O_(2)rarr2CO_(2)

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POINT A
point B
point D
point E

Answer :B::D
Discussion
11.

Temperature of stars is several times that of sun . Which of the following cycles are reponsible for the stellar energy of stars ?

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<P>Porton- porton CYCLE
Proton-nitrogen cycle
Carbon-nitrogen cycle
Proton-deutron cycle

Solution :Stellar ENERGY stars is due to (C - N) and (P- D) cycles
Discussion
12.

Temperature coefficient of most of the reactions lies between…………………….and…………………….. .

Answer»


ANSWER :2 and 3
Discussion
13.

Temperature coefficient of a reaction is 2. when temperature is increased from 30^(@)C to 100^(@)C, rate of the reaction increases by

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128 times
100 times
500 times
250 times

Solution :INCREASE in fractions of `10^(@)` comes out to be 7 times hence rate of REACTION should increase by `2^(7)` times
i.e., `2^(7)=128` times.
Discussion
14.

The temperature coefficient of a reaction is 2. When the temperature is increased from 30^(@)C to 90^(@)C, the rate of reaction is increased by

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60 times
64 times
150 times
400 times

Solution :Rate of REACTION is doubled for every `10^(@)C`RISE in temperature. Temperature goes up by `60^(@)`C, So, rate goes up `2^(6)` times i.e., times
Discussion
15.

Temperature at the foot of a mountain is 30^(@)C and pressure is 760 mm whereas at the top of the mountain these are 0^(@)C and 710 mm. compare the densities of the air at the foot and at the top of the mountain.

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<P>

Solution :`d=(Pm)/(RT) rArr (d_(1))/(d_(2))=(P_(1))/(T_(1))xx(T_(2))/(P_(2))=(760 mm)/(303 K) xx (273 K)/(710 mm) =(0.964)/(1) =0.964`
Discussion
16.

Temperature and heat are:

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EXTENSIVE PROPERTIES
INTENSIVE properties
Intensive AMD extensiveproperties respectively
Extensive and intensive properties respectively

Answer :C
Discussion
17.

Tellurium forms oxides of the formula Teo, TeO_(2) and Te_(3) . What is the nature of these oxides?

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SOLUTION :`TEO` (oxidation number of Te is `+2`) is basic.
`TeO_(2)` (oxidation number of Te is `+4`) is AMPHOTERIC.
`TeO_(2)` (oxidation number of Te is `+6`) is acidic.
As the oxidation number of the element forming oxide increases, the acidic nature also increases.
Discussion
18.

Teflon, styron and neoprene are all

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Copolymers
Condensation polymers
Homopolymers
Monomers

Answer :C
Discussion
19.

Teflon, styrene and neoprene are all

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Copolymers
Condensation polymers
Homopolymers
Monomers

Answer :C
Discussion
20.

Teflon, polystyrene and neoprene are called

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COPOLYMERS
CONDENSATION polymers
Homopolymers
Monomers

Answer :C
Discussion
21.

Teflon , neoprene , Nylon -6 are all

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co-POLYMER
Condensation polymer
Homopolymer
MONOMERS

ANSWER :C
Discussion
22.

Teflon, Orlon and Neoprene are ………………..

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HOMOPOLYMER
Co-polymer
Monomer
NONE of these

SOLUTION :Homopolymer
Discussion
23.

Teflon is polymer of :-

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Tetrafluoro ETHENE
Tetrafluoro ETHANE
ACRYLONITRILE
CAPROLACTUM

ANSWER :A
Discussion
24.

Teflon is made by polymerisation of:

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Tetrafluoroethene
Isobutene
Vinyl acetate
Methyl methacrylate

Answer :A
Discussion
25.

Teflon is an example of:

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Fibres
Elastomer
Thermoplastic
Thermosetting polymer

Answer :D
Discussion
26.

Teflon is a type of

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SOLUTION :TEFLON is an ADDITION POLYMER
Discussion
27.

Teflon is a polymer of ________.

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ethylene
tetrachloroethylene
tetrafluoroethane
tetrafluoroethylene

Solution :TEFLON is an ADDITION POLYMER
Discussion
28.

Teflon is a polymer of the monomer

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Monofluoroethene
Difluoroethane
Trifluoroethene
TETRAFLUOROETHENE

SOLUTION :Tetrafluoroethene `(CF_(2)=CF_(2))`
Discussion
29.

Teflon is a type of _____.

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SOLUTION :ADDITIONAL POLYMER
Discussion
30.

Teflon is a polyamide. Is it true or false?

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SOLUTION :nylon-66 is a POLYMIDE.
Discussion
31.

Teflon coating is done in a number of items of daily use. Name any two such items and for what purpose this coating is done?

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SOLUTION :Teflon is an insulating material. Now a days, some PEOPLE go for teflon coating on the body of their car as it covers the painted SURFACE and protects from sratch, RUST etc. teflon coating is also done on the inner side of the non-stick pans as it has great CHEMICAL inertness and thermall stability.
Discussion
32.

Teflon is:

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Fluorocarbon
Hydrocarbon
Pesticide
Insecticide

Answer :A
Discussion
33.

Teflon is :

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`(-CF_2-CF_2-)_n`
`(-C Cl_2-C Cl_2-)_n`
`(-CBr_2-CBr_2-)_n`
`CF_2Cl_2`

ANSWER :A
Discussion
34.

Teflon and neoprene are

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copolymers
condensation polymers
HOMOPOLYMERS
monomers

Solution :Homopolymers
Discussion
35.

Teflon.

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Solution :It is used in coating for COOKING pans, gaskets, VALVES ETC.
Discussion
36.

TeCl_(4)is expected to be

Answer»

TETRAHEDRAL
SQUARE PLANAR
Octahedral
TRIGONAL BIPYRAMID

Answer :D
Discussion
37.

Tear gas is also known as

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Chloropicrin
Mustard gas
Lewisite
BHC

SOLUTION :`C C l_(3).NO_(2)` is CALLED tear gas ( or ) CHLORO picrin
Discussion
38.

Tear gas is

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`COCl_2`
`CaOCl_2`
`NH_3`
`CCl_3.NO_2`

ANSWER :D
Discussion
39.

Teacher explained that due to a stoichiometric defect, the density of a crystal changes. What change can we observe?

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SOLUTION :DENSITY DECREASE
Discussion
40.

Teacher explained that due to a stoichiometric defect, the density of a crystal changes. Name the defect.

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SOLUTION :SCHOTTKY DEFECT
Discussion
41.

Teacher explained crystal defects in class room.What are the different types of crystal defects?

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SOLUTION :STOICHIOMETRIC DEFECTS and Non-Stoichiometric defects
Discussion
42.

Te yield of product in the reaction A_(2(g))+B_(2(g))hArr2AB_((g)),DeltaH=+ve

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Unaffected by PRESSURE
It OCCURS at 1000 pressure
It occurs at HIGH temperatue
It occurs at high pressure and high temperaturee

Answer :C
Discussion
43.

Te defect that is more likely to occur in almost all types of ionic crystals is

Answer»

Non-stoichiometric defects
Schottky defect only
Frenkel defect
All the above.

SOLUTION :Schottky defect is shown by HIGHLY ionic compounds, e.g. NACL,KCl,KBr,AGBR,CsCl etc.
Discussion
44.

The reagents, NH_(4)Cl and aqueous NH_(3) will precipitate

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`Ca^(2+)`
`Al^(+3)`
`Mg^(2+)`
`Zn^(2+)`

Solution :`NH_(3)+H_(2)OtoNH_(4)OH` due to common ion effect `NH_(4)^(+)` ion CONCENTRATION INCREASES which leads to the precipitation of `Al(OH)_(3)`.
Discussion
45.

Tb ^(+4) has electronic configuration 4f ^(7) 5d ^(0) 6s ^(0). Because of this it hs strong tendency to

Answer»

loose ELECTRONS
undergo OXIDATION
GAIN electron
HIGH HYDRATION

Answer :C
Discussion
46.

Tautomerism will be exhibited by

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`(CH_3)_3CNO`
`(CH_3)_2NH`
`R_3CNO_2`
`RCH_2NO_2`

SOLUTION :Nitro COMPOUNDS having `alpha`-hydrogen SHOW tautomerism
Discussion
47.

Tautomerism is possible in (1) CH_(3) - CHO""(3) H-CHO (2) CH_(3)-CO-CH_(3)""(4) (CH_(3))_(3)C-CHO

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`1, 2`
`2 , 3`
` 3 , 4`
` 1, 2, 4`

ANSWER :A
Discussion
48.

Tautomerism is shown by

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`CH_(3)-O-NO`
`CH_(3)-CH_(2)-NO_(2)`
`CH_(3)CH_(2)CN`
`CH_(3)-underset(CH_(3))underset(|)(CH)-CH`

ANSWER :2
Discussion
49.

Tautomerism is not exhibited by

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Solution : ESSENTIAL condition for TAUTOMERISM in the presence of an `alpha`-HYDROGEN on a saturated carbon attached to C = O , NO, `NO_(2)` etc. or should have a H-atom PRESENT on a heteroatom (O, N, S etc. ) attachedto a double bond. Thus , option (a) does not have a `alpha`-hydrogen on a saturated carbon and hence does not exhibit tautomerism.
Discussion
50.

Tautomerism is NOT exhibit by _________.

Answer»


`C_(2)H_(5)-OVERSET(O)overset(||)C-C(CH_(3))_(3)`

Answer :A
Discussion