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.

Ionic product of water at 310 K is 2.7 times 10^-14. What is the pH of neutral water at thin temperature?

Answer»

SOLUTION :`[H^+]=sqrtK_w=sqrt(2.7 TIMES 10^-14)=1.643 times 10^-7 M`
`pH=-LOG[H^+]=-log(1.643 times 10^-7)=7-0.2156=6.78`
Discussion
2.

IUPAC name of CH_3OC_2H_5 is:

Answer»

METHOXY ethane
Ethoxy methane
METHYL ETHYL ether
Ethyl methyl ether

Answer :A
Discussion
3.

Ionic mobility of Ag^(+) is (lamda_(Ag^(+))=5xx10^(-4)ohm^(-1)cm^(2)eq^(-1))

Answer»

`5.2xx10^(-9)`
`2.4xx10^(-9)`
`1.52xx10^(-9)`
`8.25xx10^(-9)`

SOLUTION :Ionic MOBILITY`=("Ionic CONDUCTANCE")/(96,500)`
`=(5XX10^(-4))/(96,500)=5.18xx10^(-9)cm//sec`
Discussion
4.

IUPAC name of CH_(3)N_(3)(C_(2)H_(5))_(2) is

Answer»

DIETHYL methyl amine
diethyl METHANAMINE
N-ETHYL methanamin
ethyl methyl amine

ANSWER :C
Discussion
5.

Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field?

Answer»

Na
K
Rb
Li

SOLUTION :`Li^(+)` ION is smallest and has maximum charge DENSITY. As a result, in aqueous solution, it is most heavily hydrated out of all the alka lie metal ions. Thus, hydrated `Li^(+)` has largest size. Hence, its MOBILITY is LOWEST under the electric field.
Discussion
6.

Ionic mobality of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field ?

Answer»

Na
k
Rb
Li

Answer :D
Discussion
7.

Ionic mobility of Ag^(+) at inifinite dilution is.(lambda_(Ag^+)^(0)=5xx10^(-3)ohm^(-1)m^(2)eq^(-1))

Answer»

`5.2xx10^(-8)`
`2.4xx10^(-8)`
`1.52xx10^(-8)`
`8.25xx10^(-8)`

Solution :`lambda_(AG^(+))^(@)=5XX10^(-3)ohm^(-1)m^(2)eq^(-1)`
`=5xx10^(-3)ohm^(-1)m^(2)"MOL"^(-1)`
Ionic mobility.
`mu_(Ag^(+))^(@)=(lambda_(Ag^(+))^(@))/(F)`
`=(5xx10^(-3)ohm^(-1)m^(2)"mol"^(-1))/(96500C "mol"^(-1))`
`(1C=Vohm^(-1)s)`
`=mu_(AG^(+))^(@)=5.18xx10^(-8)m^(2)V^(-1)s^(-1)`
Discussion
8.

Ionic hydrides are formed by:

Answer»

TRANSITION metals
Elements of very HIGH electropositivity
Elements of very LOW electropositivity
Metalloids

Answer :B
Discussion
9.

IUPAC name of CH_3COOC_2H_5 is :

Answer»

METHYL propanoate
ETHYL ethanoate
ACETO ethene
Ethoxy ethane

Answer :B
Discussion
10.

Ionic , covalent and coordinate bonds are present in

Answer»

Potassium bromide
WATER
SODIUM cyanide
AMMONIUM CHLORIDE

ANSWER :D
Discussion
11.

Ionic conductivity of solution does not depend on which of the following parameter ?

Answer»

NATURE of electrolyte
Nature of solvent
Concentration of electrolyte
Size of particle obtained in SOLUTION.

Solution :IONIC conductivity of solution depends on following parameter :
(A) nature of electrolyte.
(B) Nature of solvent.
(C) Concentration of electrolyte.
But conductivity of solution does not DEPEND on size of particle obtained in solution.
Discussion
12.

IUPAC name of, CH_3CH(OH)CH_2CH_2COOH is:

Answer»

4-hydroxypentanoic acid
1-carboxy-3-butanoic acid
1-carboxy-4-butanol
4-carboxy-2-butanol

Answer :A
Discussion
13.

Ionic conductance at infinite dilution of Al^(3+) " and " SO_(4)^(2-) are 1890 ohm^(-1)cm^(2)gm" equiv"^(-1) and 1600 ohm^(-1)cm^(2)gm" equiv"^(-1) respectively. The equivalent conductance is

Answer»

143 mho `CM^(2)gm" EQUIV"^(-1)`
858mho `cm^(2)gm" "equir^(-1)`
153 mho `cm^(2)gm" equiv"^(-1)`
341mho `cm^(2)gm" "equir^(-1)`

Answer :A
Discussion
14.

Ionic conductance of H^(+) and SO_(4)""( 2–) at infinite dilution are x and y S "cm"^(2)" equiv "^(–1). Hence, equivalent conductance of H_(2) SO_(4) at inifinite dilution will be:

Answer»

X + y
2(x + y)
2X + y
x + 2y

Answer :A
Discussion
15.

Ionic conductance at infinite dilution of Al^(3+) and SO_(4)^(2-) are 189 and 160 mho cm^(2) "equiv"^(-1). Calculate the equivalent and molar conductance of the electrolyte Al_2(SO_4)_3 at infinite dilution.

Answer»

Solution :(i) MOLAR conductance, `(Lambda_m^@)_(Al_2(SO_4)_3) = 2(Lambda_m^@)_(AL^(3+)) + 3(Lambda_m^@)_(SO_4^(2-))`
`=(2 xx 189) + (3 xx 160)`
`= 378 + 480`
`= 858` MHO `cm^(2) MOL^(-1)`.
(ii) Equivalent conductance `(Lambda_(oo))_(Al_2(SO_4)_(3)) = 1/3 (lambda_(oo))_(Al^(3+)) + 1/2(lambda_(oo))_(SO_4^(2-))`
`= 189/3 + 160/2`
`= 63 + 80`
`143` mho `cm^2 (g"equiv")^(-1)`.
Discussion
16.

Ionic conductance at infinite dilution of Al^(3+) " and " SO_(4)^(2-) are 189 and 160 mho cm^(2)" equiv"^(-1). Calculate the equivalent and molar conductance of the electrolyte Al_(2)(SO_(4))_(3) at infinite dilution.

Answer»

Solution :The electrolytes is `Al_(2)(SO_(4))_(3)`
Equivalent conductance at infinite dilution
`lambda_(INFTY)Al_(2)(SO_(4))_(3)=1/3lambda_(infty)Al^(3)+1/2lambda_(infty)SO_(4)^(2-)`
`lambda_(infty)Al_(2)(SO_(4))_(3)=189/3+160/2=63+80`
`""=143 " MHO "cm^(2)" gm "equ^(-1).`
Molar conductance at infinite dilution
`mu_(infty)Al_(2)(SO_(4))_(3)=2 times 189+3 times 160`
`""=858" mho "cm^(2)mol^(-1)`
Discussion
17.

IUPACname of CH_(3)CH_(2)CH_(2)underset(CH_2OH)underset(|)(C)H- CH_(2)CH_(3) is

Answer»

3-propylbutan-1-ol
2-ethylpentan-1-ol
3-methyl hydroxyhexane
2-ethyl-2-propyl ethanol.

SOLUTION :`UNDERSET("2-Ethypentan-1-ol")(overset(5)CH_3overset(4)CH_2overset(3)CH_2underset(""^1CH_2OH)underset(|)overset(2)"CH"-CH_2CH_3)`
Discussion
18.

Ionic conductivity of electrolyte in water is not depending on which of the following ?

Answer»

Concentration of electrolyte
Temperature
Type of solvent and its VISCOSITY
Pressure

Solution :Conductivity of electrolyte does not DEPEND on pressure.
It DEPENDS on (A) concentration of electrolyte, (B) temperature and (C) type of solvent and its viscosity.
Discussion
19.

Ionic compounds in geneal do not possess :

Answer»

high MELTING points and non-directional bonds
high melting points and low-boiling points
directional bonds and low-boiling points
high solubilities in polar and non-polar solvents

Answer :B::C::D
Discussion
20.

IUPAC name of CH_3CH_2CH(CH_3)NH_2

Answer»

1-methyl propane-1-amine
Butan-2-amine
2-methyl propan-3-amine
None of these

Answer :B
Discussion
21.

Ionic compounds do not have

Answer»

hard and brittle nature
high MELTING and BOILING point
directional PROPERTIES
soluble in polar solvents

Answer :C
Discussion
22.

Ionci radii of

Answer»

`Ti ^(4 +) lt Mn ^(7+)`
`"" ^(35)Cl GT "" ^(37)Cl^(-)`
`K^(+) gt Cl ^(-)`
`P ^(3+) gt P ^(5+)`

Answer :D
Discussion
23.

Ionic and covalent bonds are present in

Answer»

`C Cl_(4)`
`CaCl_(2)`
`NH_(4)Cl`
`H_(2)O`

SOLUTION :`NH_(4) Cl` has covalent as well as ionic bond.
`[H-OVERSET(H)overset(|)underset(H)underset(|)(N)TOH^(+)]Cl^(-)`
Discussion
24.

Ion which has maximum complex forming tendency :

Answer»

`Li^(+)`
`Be^(+2)`
`Ba^(+2)`
`CS^(+)`

ANSWER :B
Discussion
25.

IUPAC name of (CH_(3))_(3)C.NH_(2) is

Answer»

trimethyl BUTANAMINE - 1
2 - methyl butanamine - 1
2 - methyl propanamine - 2
2 - methyl propanamine - 1

Answer :C
Discussion
26.

Iodofrom can be prepared from:

Answer»

Isoamyl alcohol
`alpha-` Phenyl ethanol
Isobutyl alcohol
`beta-` ethanol

Solution :Alcohol containing `(CH_(3) - underset(OH)underset(|)(CH-))`
ALDEHYDE containg THREE `alpha-H` atoms `(CH_(3) - CHO)` and hence kenote containg three `alpha-H` atoms.
`(CH_(3) - overset(O)overset(||)(C) - CH_(3))` GIVES iodoform TEST.
a. (Iso-anyl alchol ) does not contain`(CH_(3) - underset(OH)underset(|)(CH)-)` group.
So does not give IODOFROM.
(Anyl implies Five `C` atoms).
c.
(It does not contain `(CH_(3) - underset(OH)underset(|)(CH)-)` so does not give iodorom).
d. `Ph-C overset(beta)(H)_(2) - overset(alpha)(CH)_(2)OH` (It does not contain`(Me - underset(|)(CH)-OH)` group, so does not give iodoform.)
Discussion
27.

Iodofrom is formed when ethanol is heated with :

Answer»

POTASSIUM IODIDE and SODIUM hydroxide
Iodine and AQUEOUS potassium hydroxide
Chloroform and iodine
Iodine and potassium iodide

Answer :B
Discussion
28.

Iodoform when heated with silver powder, forms

Answer»

ETHYNE
Ethane
Ethene
Methane

Answer :A
Discussion
29.

IUPAC name of (CH_(3))_(3)C Cl is

Answer»

3-chlorobutane
2-chloro-2-methylpropane
t-butyl chloride
n-butyl chloride

Solution :`{:("".^(1)CH_(3)),("|"),(H_(3)C-.^(2)C-Cl),("|"),("".^(3)CH_(3)):}`
IUPAC name : 2-Chloro-2-methylpropane.
Discussion
30.

Iodoform was earlier used as an antiseptic but the antiseptic properties are due to the liberation of free __________and not due to iodoform itself.

Answer»


ANSWER :IODINE
Discussion
31.

IUPAC name of (CH_(3))_(3)"CC"l

Answer»

3-Chlorobutane
2-Chloro-2-methylpropane
t-butyl chloride
n-butyl chloride

Solution :`OVERSET(1)(C)H_(3)-underset(Cl)underset(|)overset(CH_(3))overset(2|)(C)-overset(3)(C)H_(3)` 2-chloro-2-methyl PROPANE.
Discussion
32.

Iodoform test is not shown by

Answer»

2 - Butanone
SEC. amylalchol
Ethyl phenyl ketone
ACETOPHENONE

Solution :Iodoform test is SHOWN by alcohols of the general fromula `R-overset(H)overset(|)underset(OH)underset(|)(C)-CH_(3)` and carbonyl compounds of the general FORMUAL `R-overset(O)overset(||)(C)-CH_(3)`
Discussion
33.

IUPAC name of (CH_3)_3C-CH=CH_2 is:

Answer»

3,3,3-trimethyl prop-1-ene
1,1,1-trimethyl but-2-ene
3,3-dimethyl but-1-ene
2,2-dimethyl but-3-ene

Answer :C
Discussion
34.

Iodoform test will not be given by:

Answer»

Acetaldehyde
acetone
2-Pentanone
3-Pentanone

Answer :D
Discussion
35.

Iodoform testisgiven by

Answer»

a) `CH_3 . CH_2. CHOH. CH_3`
`CH_2BrCH_2CH_2Br`
`CH_3CHBrCH_2Br`
`CH_3CHBr_2`

ANSWER :D
Discussion
36.

Iodoform test is not given by

Answer»

ETHANOL
ethanal
acetone
3- pentanone

Solution :Iodoform test is given by ORGANIC COMPOUNDS which contains `CH_(3)CO` group of `CH_(3)CHOH` GROUPING . 3 - pentanone does not contains any one of such grouping.
Discussion
37.

IUPAC name of (CH_3)_2CHCH_2CH_2Br is

Answer»

1-Bromo - 3 -methyl BUTANE
1-Bromo - 3-methyl PROPANE
1-Bromo pentane
3-Bromo pentane

ANSWER :A
Discussion
38.

IUPAC name of (CH_3)_2N-C_2H_5 IS:

Answer»

DIMETHYL ETHYL amine
Dimethylaminomethane
Dimethylaminoethane
N,N-dimethylethanamine

Answer :D
Discussion
39.

Iodoform test is not given by :

Answer»

2 - Pentanol
3 - Pentanol
Ethanol
Ethanal.

Answer :B
Discussion
40.

Iodoform test is not answered by

Answer»

`CH_3CHO`
3-pentanone
`CH_3COCH_3`
`CH_3CHOHCH_2C_6H_5`

ANSWER :C
Discussion
41.

IUPAC name of (CH_3)_2 CHCH_2CH_2Br is

Answer»

1-Bromo-3-methylbutane
1-Bromo-3-methylpropane
1-Bromopentane
3-Bromopentane

ANSWER :A
Discussion
42.

IUPAC name of CH_(3) - underset(underset(OH)(|))(CH) - CH_(2) - underset(underset(COOH)(|))(CH) - CH_(3) is

Answer»

4-hydroxy-1-methyl pentanoic ACID
4-hydroxy-2-methyl pentanoic acid
2-hydroxy-4-methyl pentanoic acid
2-hydroxy -2-methyl pentanoic acid

Solution :`underset("4-hydroxy-2-methylpentanoic acid")(H_(3)OVERSET(5)(C ) - underset(underset(OH)(|))overset(4)(C )H-overset(3)(C )H_(2) - underset(underset(underset(1)(COOH))(|))overset(2)(C H) - CH_(3))`
Discussion
43.

Iodoform test is characteristic of:

Answer»

`Ar-OH` GROUP
`-CO-CH_3` group
`-CHO` group
`-COOH` group

ANSWER :B
Discussion
44.

Iodoform test is not given by:

Answer»

Ethanol
Benzophenone
Ethanal
Acetophenone

Answer :B
Discussion
45.

IUPAC name of CH_3-O-C(C_2H_5)_3 is

Answer»

3-methoxy -2-ethylpentane
2-methoxy -2-ethylpentane
3-methoxy- 3-ethylpentane
2-methoxy -3-ethylpentane

Answer :C
Discussion
46.

Iodoform reaction is used to detect

Answer»

`HCO` group
`C_(6)H_(5)CHO`
`CH_(3)C_(6)H_(4)CHO`
`CH_(3)CHO`

Answer :B
Discussion
47.

IUPAC name of CH_3-O-C_2H_5 is

Answer»

ethoxymethane
methoxymethane
methoxyethane
ethylmethylether

Answer :C
Discussion
48.

Iodoform reaction is shown by

Answer»

`CH_(3)CH_(2)CH_(2)CH(OH)CH_(3)`
`C_(2)H_(5)OC_(2)H_(5)`
`CH_(3)CH_(2)CH_(2)CH_(2)OH`
`(CH_(3))_(3)COH`

Solution :All the alcohols containing the following segment respond to IODOFORM REACTION
Discussion
49.

IUPAC name of CH_(3)-CH=CH-C-=CH is

Answer»

Pent-2-en-4-yne
Pent-3-en-1-yne
Pent-3-yne-1-en
Pent-2-yne-1-en

Answer :B
Discussion
50.

IUPAC name of {:(CH_(3)-CH-CHO),("|"),(""CH_(2)CH_(3)):} is

Answer»

Butane-2-aldehyde
2-methylbutanal
3-methyl isobutyraldehyde
2-ethylpropanal

Answer :B
Discussion