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.

How many cyclic isomers of C_(5)H_(10) are possible?

Answer»

4
3
2
5

Answer :D
Discussion
2.

How many cyclic compounds are possible of C_5H_10​ except steroio-isomer.

Answer»


ANSWER :D
Discussion
3.

How many cyclic compounds are possible of C_(5)H_(10) except steroio- isomer

Answer»


SOLUTION :NA
Discussion
4.

How many cyanide ions in K_4 [Fe (CN)_6]are involved in satisfying the primary valency of the central metal ion ?

Answer»

SOLUTION :TWO or 2.
Discussion
5.

How many cyanide ions are involved in the following chemical equation Au+CN^(-)+H_(2)O+O_(2) to [Au(CN)_(2)]^(-)+OH^(-)

Answer»


SOLUTION :`4Au+8NaCN+2H_(2)O+O_(2) to 4NA[AU(CN)_(2)]+4NaOH`.
Discussion
6.

How many coulombs of electricity will be required to deposit 0.6354g of Cu in electrolytic cell containing copper sulphate solution ? (Atomic weight of copper 63.54)

Answer»

96.5 coulomb
96.5 coulombs
1930 coulombs
3860 coulombs

Solution :96,500 C=31.75 G of Cu (Equivalent WEIGHT)
`THEREFORE 1,930 C-= 0.6354` g of Cu.
Discussion
7.

How many coulombs of electricity are required for the reduction of 1 mole of MnO_(4) ^(-) to Mn^(2+)?

Answer»

96500 C
`9.65 XX L0^(6)` C
`4.83 xx10^(5)` C
`1.93 xx 10^(5)` C

Answer :A
Discussion
8.

How many Coulombs of electricity required to oxidise one mole of Al to Al^(3+)?

Answer»

SOLUTION :`3xx96500C`
Discussion
9.

How many coulombs of electricity are required for the oxidation of one mole of water to dioxygen ?

Answer»

`1.93xx10^(4)C`
`19.3xx10^(5)C`
`9.65xx10^(4)" C"`
`1.93xx10^(5)" C"`

Solution :(d) `H_(2)O to 2H^(+)+1//2 O_(2)+UNDERSET(2 mol)(2e^(-))`
No. of coulombs electricity required `=2xx96500" C"`
`=1.93xx10^(5)" C"`
Discussion
10.

How many coulombs of electricity are required for the reduction of 1 mol of MnO_4^(-) " to " Mn^(2+) ?

Answer»

96500 C
`1.93 XX 10^(5) C`
` 4.83 xx 10^(5) C `
`9.65 xx 10^(6) C `

ANSWER :C
Discussion
11.

How many coulombs are required to produce 40.5 g of Al from molten Al_(2)O_(3)?

Answer»

Solution :`Al_(2)O_(3)hArr2Al^(3+)+3O^(2-)`
`Al^(3)+3etoAl`
`27g.3F`
27 G of Al is produced from ELECTRICITY `=3xxF`
40.5 g of Al will be produced from electricity
`=(3F)/(27)xx40.5`
=4.5 F
`=4.5xx96500`
=434250 C
Discussion
12.

How many coulombs of electricity are required for the oxidation of one mol of water to dioxygen ?

Answer»

`1.93 XX 10^5C`
`9.65 xx 10^4 C`
`3.86 xx 10^5C`
`4.825 xx 10^4C`

ANSWER :A
Discussion
13.

How many coulombs of electricity are consumed when 100 mA current is passed through a solution of AgNO_(3) for 30 minutes during electrolysis ?

Answer»

108
180
18000
3000

Answer :B
Discussion
14.

How many coulombs are required to produce 40.5 g of Al from molten Al_(2)O_(3) ?

Answer»

Solution :`Al_(2)O_(3)hArr2Al^(3+)+3O^(2-)`
`Al^(3+)+3etoAl`
27 G F
27 g of Al is PRODUCED from electricity `=3xxF`
40.5 g of Al will be produced from electricity
`=(3F)/(27)xx40.5`
=4.5 F
`=4.5xx96500`
=434250 C
Discussion
15.

How many coulombs are required for the oxidation of 0.01 mol of H_(2)O to O_(2) ?

Answer»

`1.93 xx 10^(3) C`
`9.65 xx 10^(2) C`
`3.86 xx 10^(5) C`
`4.285 xx 10^(2) C`

Solution :In the ELECTROLYSIS of dil. `H_(2)SO_(4)` the electrolysis takes place as
`H_(2)O HARR H^(+)+OH^(-)`
At anode `"" 2OH^(-) to H_(2)O+[O]+2e^(-)`
At cathode `"" 2H^(+)+2e^(-) to 2[H]`
`THEREFORE W+[O]:W+2[H^(+)] therefore 16:2 therefore 8:1`
Discussion
16.

How many coulombs are required for oxidation of 1 mol H_(2)O to O_(2) ?

Answer»

`3.88xx 10^(5) C `
`9.65xx 10^(4) ` C
`1.93 XX 10 ^(5) `C
`4. 8 25 xx 10^(4)` C

Answer :A
Discussion
17.

How many coulombs are required for the oxidation of 1 mole of H_(2)O_(2) to O_(2) ?

Answer»

`93000C`
`1.93xx10^(5)C`
`9.65xx10^(4)C`
`19.3xx10^(2)C`

ANSWER :B
Discussion
18.

How many coulombs are reqauired for the oxidation of 1 mol of H_(2)O to O_(2) ?

Answer»

SOLUTION :2 COULOMBS
Discussion
19.

How many coulomb of charge are consumed when 100 mA current is passed through a solution of AgNo_(3) forhalf an hour during electrolysis ?

Answer»

108 C
180 C
1800 C
18000 C

Answer :B
Discussion
20.

How many coulomb of charge is required for deposition of 2/3 mole of Al in electrolysis of molten Al_(2)O_(3)?

Answer»


ANSWER :`Q=1.93xx10^(5)C`
Discussion
21.

How many coulomb of electricity are consumed when 100 mA current is passed throught a solution of AgNO_3 for 30 minute during an electrolysis experiment:

Answer»

108
18000
180
3000

Answer :C
Discussion
22.

How many coulombs are required for the oxidation of 1 mol of H_(2)O_(2)?

Answer»

`9//65xx10^(4)C`
93000 C
`1.93xx10^(5)C`
`19.3xx10^(2)C`

ANSWER :C
Discussion
23.

How many coordination isomeric (Pt(NH_(3))_(2)CI_(2)) exists with +2 state of Pt

Answer»


SOLUTION :TWO FORMS.
Discussion
24.

How many compounds show conductivity HCl(aq), HCl (molten), AlCl_(3) (molten), AlF_(3) (molten), Graphite, Na(s) AlCl_(3) (aq)

Answer»

4
5
6
3

Solution :`HCl (AQ) to H^(+) +CL^(-)`
`AlF_(3)` molten `to Al^(+3) +F^(-)`
Graphite `to` delocalised of `.PI.` electron
`Na(s) to` METALLIC solid (free electron)
`AlCl_(3)(aq) to Al^(+3)+Cl^(-)`
Discussion
25.

How many compounds show optical isomerism of molecular formula C_5H_12O?

Answer»

2
3
4
5

Answer :B
Discussion
26.

How manycompounds liberate NH_(3) on heatingfromthe following ? (NH_(4))_(2)SO_(4),(NH_(4))_(2)CO_(3),NH_(4)CI,NH_(4)NO_(3),(NH_(4))_(2)Cr_(2)O_(7)

Answer»


Solution :`(NH_(4))_(2)SO_(2),(NH_(4))_(2)CO_(3) and NH_(4)CI` gives `NH_(3)` on HEATING an shown
i. `2(NH_(4))_(2)SO_(4) overset(Delta) to underset("Ammoniumpyrrosulphate")((NH_(4))_(2) S_(2)O_(7)) + 2NH_(3) +H_(2)O`
`3(NH_(4))_(2) S_(2)O_(7) overset(Delta)(to)2NH_(3) + 6SO_(2) + 2N_(2) + 9H_(2)O`
iii. `NH_(4)CI overset(Delta) to NH_(3) + HCI`
`NH_(4)NO_(3)` and` (NH_(4))_(2)S_(2)O_(3)` on heating gives `N_(2)O`and `N_(2)` respectively as shown
iv
V. `(NH_(4))_(2)S_(2)O_(7) overset(Delta)(to) N_(2) + Cr_(2)O_(3) + 4H_(2)O`
Discussion
27.

How many compound(s) or iron (s) can be oxidised by H_(2)O_(2) among the following (i) AsO_(3)^(2) (ii) SO_(4)^(2-) (iii) Fe_(2) (SO_(4))_(3) (iv) NH_(2) - NH_(2) (v) H_(2)S (vi) PbS (vii) O_(3)

Answer»


ANSWER :4(I, IV, V and VI)
Discussion
28.

How many compounds liberate NH_(3) on heating from the following ? (i) (NH_(4))_(2)SO_(4) "" (ii) (NH_(4))_(2)CO_(3) "" (iii) NH_(4)Cl (iv) NH_(4)NO_(3) "" (v) (NH_(4))_(2)Cr_(2)O_(7)

Answer»


ANSWER :3 (I,II, III)
Discussion
29.

How many compounds out of the following are more reactive than ethyl acetate towards hydrolysis.

Answer»


Solution :All molecules which have greater positive CHARGE centre at acyl CARBON (more than ethyl acetate) are more reactive than it TOWARDS hydrolysis
Discussion
30.

How many compounds have zero dipole-moment ? (a)CH_3Cl , (b)CHCl_5 , ( c)C Cl_4 , (d)CH_3OH (e)CH_3OCH_3 , (f)CO_2 , (g)CH_4 , (h)CH_3COCH_3

Answer»


Solution :DIPOLE moment is PRODUCED due to ELECTRONEGATIVITY DIFFERENCE is asymmetric molecule. OPTION c,f and g have zero dipole moment.
Discussion
31.

How many compounds from the following list are isomers of D-glucose? D-Mannose, D-Fructose, D-Glucose, D-Idose, D-Galactose, D-Arabinose, D-Ribose

Answer»


ANSWER :5
Discussion
32.

How many compounds gives Cannizzaro reaction and aldol condensation respectively

Answer»

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

Answer :A
Discussion
33.

How many compounds given below are not reduced by catalytic hydrogenation? CH_3 COOC_2 H_5 ,CH_3 CN,CH_3 COCI,CH ,CH_3CONHCH_3,(CH_3)_2 C_2

Answer»


Solution :`CH_3 - overset(O ) overset(||)C-OC_2 H_5 ,CH_3 - overset(O) overset(||)C -NH -CH_3 ,CH_3 -C-= N,H_3 C- CH-= C- CH_3 , CH_3 - overset(O) overset(||)C -CI`
Discussion
34.

How many compounds from following exhibit d-orbital resonance.

Answer»


SOLUTION :
Discussion
35.

How many compounds are hydrocarbon in the following ?

Answer»


ANSWER :8
Discussion
36.

How many compounds among the following have a stereoisomer that is achiral ? (a) (i) 2,3-dichlorobutane (ii) 2,3-dichloropentane (iii) 2,3-dichloro-2,3-dimethylbutane (b) (i) 1,2-dimethylcyclobutane (ii) 1,3-dibromocyclobutane (iii) 1,3-dichlorocyclopentane (iv) 1,2-dimethylcyclopentane (c) (i) 2,4-dibromopentane (ii) 2,3-dibromopentane (iii) 1,4-dimethylcyclohexane

Answer»


ANSWER :(a)2 (B)4 ( C) 2
Discussion
37.

How many compounds among the following may exhibit tautomerism?

Answer»

1
2
3
4

Solution :For KETO to ENOL `to` one acidic H MUST be in conjugation with keto grp.
Discussion
38.

How many compounds A through G are enol tautomer of 2-butanone?

Answer»


ANSWER :3ABF
Discussion
39.

How many compound give CO_2 gas on reaction with NaHCO_3 ?

Answer»


SOLUTION :Picric ACID , BENZOIC acid and sulphonic acid GIVE `CO_2` gas with `NaHCO_3`
Discussion
40.

How many complexes among the following are paramagnetic [Mn(CN)_(6)]^(3-),[Cr(H_(2)O)_(6)]^(3+),[Co(en)_(3)]^(3+), [V(CO)_(6)],[Ni(NH_(3))_(6)]^(2+),[Ni(dmg)_(3)], [Pt(Cl)_(2),(NH_(3))_(2)].[Cu(NH_(3))_(4)]^(2+),[Cu(CN)_(4)]^(3-)

Answer»


ANSWER :5
Discussion
41.

How many colloidal systems exist in nature in which liquid is dispersed phase?

Answer»


SOLUTION :AEROSOL, EMULSION, GELS
Discussion
42.

How many compound which is given below is isomer of D-Glucose ? D-Mannose, D-Fructose, D-Gulose, D-Idose, D-Galactose, D-Arabinose, D-Ribose.

Answer»


ANSWER :5
Discussion
43.

How many Cl^(-) ions are there around Na^(+) ion in NaCl crystal

Answer»

3
4
6
8

Answer :C
Discussion
44.

How many -Cl atoms are present per molecule of sucralose?

Answer»


ANSWER :3
Discussion
45.

How many Cl - atoms are present in Bithional added in soaps for (antiseptic properties)

Answer»


ANSWER :4
Discussion
46.

How many chrial centres are in (G) (L-ascorbic acid) ?

Answer»

1
2
3
4

Solution :TWO CHIRAL CENTRE as MARKED `(**)`.

Discussion
47.

How many chlorobenzenes are possible for compound having molecular formula C_7H_7Cl ?

Answer»


SOLUTION :
Discussion
48.

How many chloride ions are there around sodium ion in sodium.

Answer»

3
8
4
6

Solution :In NaCl CRYSTAL EVERY `Na^(+)` ion is SURROUNDED by 6 `CL^(-)` ion and every chloride ion is surrounded by `6Na^(+)` ion.
Discussion
49.

How many chiral structure isomers of alcohols are possible by molecular formula C_5H_10O?

Answer»


SOLUTION :
Discussion
50.

How many chiral stereosimers are possible for 2-bromo-3-chlorobutane

Answer»


SOLUTION :`CH_(3)-underset(Br)underset(|)(overset(*)(C))H-underset(Cl)underset(|)(overset(*)(C)H)-CH_(3)` since the compound has two different chiral CARBONS, therefore, `2^(2)=4` optical isomers.
Discussion