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 maximum bonds are equivalent in the dichromates dianion ?

Answer»


SOLUTION :`""^(Ө)O- OVERSET(O)overset(||) UNDERSET(O)underset(||)Cr-O -overset(O)overset(||)underset(O)underset(||)Cr-O^(Ө)`
Discussion
2.

How many maximum atoms are present in one planeof [PtCl_(3)(n^(2)-C_(2)H_(4))]^(-) ?

Answer»

8
2
5
4

Answer :4
Discussion
3.

How many maximum atoms lie in the same plane in the structure of methylenesulphurtetrafluoride (CH_2SF_4) ?

Answer»


SOLUTION :
Discussion
4.

How many m. moles of sourose should be dissolved in 500 grams of water so as to get a solution which has a difference of 103.57^@C between boiling point and freezing point ? (K_f=1.86 K kg "mol"^(-1), K_b=0.52 K Kg "mol"^(-1))

Answer»

500 m. moles
900 m. moles
750 m. moles
650 m. moles

Solution :BOILING point of solution =boiling point `+DeltaT_b=100+DeltaT_b`
Freezing point of solution =freezing point `-DeltaT_f=0-DeltaT_f`
Difference in TEMPERATURE (given)=`100+DeltaT_b-(-DeltaT_f)`
`103.57=100+DeltaT_b+DeltaT_b+DeltaT_f=100+"MOLALITY"xxK_b+"molality"xxK_f`
`=100+"molality"(0.52+1.86)`
Molality=`(103.57-100)/238=3.57/2.38=1.5 m`
and molality =`("moles"xx1000)/W_(gm(SOLVENT)), 1.5=("moles"xx1000)/500`
Moles of SOLUTE =`(1.5xx500)/1000=0.75` moles
Discussion
5.

How many lone pairs are associated with xenon in xenon difluoride :

Answer»

1
2
3
4

Answer :C
Discussion
6.

How many litres of water must be added to 1 litre of an aqueous solution of HCl with a pH of 1 to create an aqueous solution with pH of 2 ?

Answer»

0.1 L
0.9 L
2.0 L
9.0 L

SOLUTION :`pH=1 therefore [H^(+)]_(1)=10^(-1)M`
`pH=2 therefore [H^(+)]_(2)=10^(-2)M`
According to DILUTION law,
`M_(1)V_(1)=M_(2)V_(2)`
`10^(-1)XX1=10^(-2)xx V_(2)`
`V_(2)=(10^(-1)xx1)/(10^(-2))=10L`
`therefore` WATER to be added `=10-1=9L`.
Discussion
7.

How many litres of water must be added to 1 litre an aqueous solution of HCl with a pH of 1 to create an aqueous solution with pH of 2

Answer»

0.1 L
0.9 L
`2.0 L`
`9.0 L`

Solution :`pH = 1 [H^(+)] = 10^(-1) = 0.1 M`
`pH = 2 [H^(+)] = 10^(-2) = 0.01`
for dilution of HCl `M_(1)V_(1) = M_(2)V_(2)`
`0.1 XX 1 = 0.01 xx V_(2)`
`V_(2) = 10 l t`
Volume of water added = 10 - 1 = 1litre.
Discussion
8.

How many litres of oxygen at 1 atm & and 273K will be required to burn completely 2.2 of propene (C_(3)H_(8))

Answer»

11.2 L
22.4 L
5.6 L
44.8 L

Answer :C
Discussion
9.

How many litre of C_(7)H_(16) will be required to react with 176 gm of oxygen. If density of C_(7)H_(16) will be required to react with 176 gm of oxygen. If density of C^(7)H_(16) is 0.8 gm/L?

Answer»

62.5L
40L
50L
80L

Solution :`C_(7)H_(16)+11O_(2)rarr7CO_(2)+8H_(2)O`
`(176)/(32)=5.5`
`n_(C_(7)H_(15))"required"=(n_(O_(2)))/(11)=(5.5)/(11)=0.5`
`d_(C_(7)H_(16))=(50)/(V LIT)0.8rArrV=(50)/(0.8)=(500)/(8)=62.5` litre
Discussion
10.

How many linear chain isomers are possible for each of the following olefins ? Practice Questions

Answer»

`C_(4)H_(8)`
`C_(5)H_(10)`
`C_(3)H_(6)`
`C_(6)H_(12)`

SOLUTION :(a) `CH_(3)CH_(2)CH=CH_(2)`
`CH_(3)CH=CHCH_(3)" (cis, trans)"`
(c ) `CH_(3)CH=CH_(2)" one"`
(d) `CH_(3)CH_(2)CH_(2)CH_(2)CH=CH_(2)(l),CH_(3)CH_(2)CH_(2)CH=CHCH_(3)" (cis, trans)"`
`CH_(3)CH_(2)CH=CHCH_(2)CH_(3)" (cis, trans)"`
Discussion
11.

How many layers are adsorbed in chemical adsorption?

Answer»

One
Two
Many
Zero

Solution :CHEMICAL ADSORPTION INVOLVES FORMATION of MONOLAYER.
Discussion
12.

How many lattice points are there in one unit cell of the following lattices? Simple cubic

Answer»


ANSWER :SIMPLE cubic-1
Discussion
13.

How many lattice points are there in one unit cell of the following lattices? Face centred cubic

Answer»


ANSWER :FACE CENTRED cubic-4
Discussion
14.

How many lattice points are there in one unit cell of the following lattices? Body centred cubic

Answer»


ANSWER :BODY CENTRED cubic-2
Discussion
15.

How many lattice points are there in one unit cell of each of the following lattice ? (i)Face-centred cubic (ii) Face-centred tetragonal (iii) Body-centered

Answer»

Solution :(i)`"Lattice points in FACE-CENTRED CUBIC lattice "="8 (at corners)" +" 6 (at the face centre)"= 14`
(ii) `"Face centred TETRAGONAL "= "8 (at corners) "+ "6 (at the face centre) "= 14`
(iii)`"Lattice points in body-centred cube "= "8 (at corners)" +"1 (at the body centre)" = 9`
Discussion
16.

How many lattice points are there in one unit cell of each of the following lattice ? (i) Face-centred cubic (ii) Face-centred tetragonal (iii) Body-centred

Answer»

Solution :(i) Face-centred CUBIC :
No. of lattice POINTS = 8(at corners) + 6(at faces)
= 14
No. of ATOMS per unit cell
`= (8 xx 1/8) + (6 xx 1/2)`
`=4`
(ii) Face-centred TETRAGONAL crystal does not exists. For tetragonal crystal system only primitive and body-centred unit cells are common.
(III) Body-centred cubic :
No. of lattice points = 8(at corners) + 1(at body centre)
`= 9`
No. of atoms per unit cell
`= (8 xx 1/8) + 1`
`= 2`.
Discussion
17.

How many lattice points are there in one unit cell of each of the following lattice ? (i) Face-centred cubic (ii) Face-centred tetragonal (iii) Body-centred cubic.

Answer»

Solution :Face-centred cubic or face-centred TETRAGONAL :
There are particles on each corner and at the centre of each face in face-centred cubic.
Particles per unit cell =`(8xx(1)/(8))+(6xx(1)/(2))=4`
Body-centred cubic LATTICE :
There are particles on each corner and in the middle of the body of each unit cell.
Particles per unit cell = `(8xx(1)/(8))+1 =2`
Discussion
18.

How many lattice points are there in one unit cell of each of the following lattice ? (i) Face - centred cubic "" (ii) Face-centred tetragonal "" (iii) Body-centered

Answer»

SOLUTION :(i) Lasttice point in face-CENTRED cubic lattice = 8(at corners) + 6(at the face CENTRE) = 14
(ii) Face centred tetragonal = 8(at corners) + 6(at the face centre) = 14
(iii). Lattice points in BODY-centred cube = 8(at corners) + 1 (at the body centre) = 9.
Discussion
19.

How many kJ energy is expected during the passes of 1 ampere current for 90 sec under a potentialof 100 V?

Answer»


SOLUTION :`W = 1 XX 90 xx 100 = 9000 " Joul " = 9KJ`
Discussion
20.

How many kinds of space lattices are possible in a crystal?

Answer»

23
7
230
14

Answer :D
Discussion
21.

How many ketones of the following has hex root word ?

Answer»


ANSWER :2
Discussion
22.

How many ketones are possible for molecular formula C_(4)H_(8)O?

Answer»

1
2
3
4

Answer :A
Discussion
23.

How many ketones having molecular weight = 100 will react with LiAlH_(4) to given a product with significant optical activity ?

Answer»


SOLUTION :N//A
Discussion
24.

How many kinds of primitive unit cells are possible

Answer»

23
7
230
14

Answer :B
Discussion
25.

How many isopropyl groups are present in the parent chain ?

Answer»


ANSWER :3
Discussion
26.

How many isomers 'x' of C_(8)H_(10) when reacts with hot alkaline KMnO_(4) give only aromatic dicarboxylic acid ? How many isomers 'y' of C_(4)H_(8) when reacts with hot alkaline KMnO_(4) give carbondioxide ? Sum of x + y =?

Answer»


Solution :Ortho, meta and para xylene GIVES dicarboxylic acid on treatment with `KMnO_(4)` 1-butene and iso-butene on oxidation with hot alkaline `KMnO_(4)` gives `CO_(2)`
Discussion
27.

How many isomers possible for [Co(gly)(dmg)(en)]^(+1)?

Answer»

2
3
4
None of these

SOLUTION :`[M(AB)(C C)(D D)]`
Discussion
28.

How many isomers on monochlorination can be obtained from (CH_3)_3C - Et

Answer»


SOLUTION :
Discussion
29.

How many isomers of the complex Pt(NH_3)_2(SCN)_2 are possible ?

Answer»


SOLUTION :`[Pt(NH_3)_2(SCN)_2]` - cis and trans ISOMERS = 2
`[Pt(NH_3)_2(NCS)(SCN)]` - cis and trans isomers = 2
`[Pt(NH_3)_2(NCS)_2]` - cis and trans isomers = 2
The COMPLEX is square planar , so it does not have a PARI of enantiomer on account of the presence of plane of symmetry.
Discussion
30.

How many isomers of octahedral Co(NH_(3))_(3)Cl_(3) are there ?

Answer»

2
3
4
5

Answer :A
Discussion
31.

How many isomers of C_(5)H_(11)OH will be primary alcohols

Answer»

2
3
4
5

Solution :`UNDERSET("Pentan-1-ol")(CH_(3)-CH_(2)-CH_(2)-CH_(2)-CH_(2)-OH)`
`{:(overset(4)(C)H_(3)-overset(3)(C)H-overset(2)(C)H_(2)-overset(1)(C)H_(2)-OH),("|"),(""CH_(3)),("3-Methylbutan-1-ol"):}`
`{:(overset(4)(C)H_(3)-overset(3)(C)H_(2)-overset(2)(C)H-overset(1)(C)H_(2)-OH),("|"),(""CH_(3)),("2-Methyl butan-1-ol"):}`
`{:(""CH_(3)),("|"),(overset(3)(C)H_(3)-overset(2)(C)-overset(1)(C)H_(2)-OH),("|"),(""CH_(3)),("2, 3-Dimethyl propan-1-ol"):}`
Discussion
32.

How many isomers of C_(5)H_(11)OH will be primary alcohol?

Answer»

2
3
4
5

Answer :C
Discussion
33.

How many isomers of C_5H_11OH will be 1^@ alcohols?

Answer»

Five
Four
TWO
SEVEN

Answer :B
Discussion
34.

How many isomers of C_5H_(11)OH will be primary alcohols ?

Answer»

5
4
2
3

Answer :B
Discussion
35.

How many isomers (including geometrical and optical) are possible for bromochlorocyclobutane?

Answer»


SOLUTION :SEVEN POSSIBLE ISOMERS are

Discussion
36.

How many isomers exist for the [Co(NH_(3))_(4)Cl_(2)]^(+)" and "[Co(en)_(2)Cl_(2)]^(+) ions, respectively ? [en=H_(2)NC_(2)H_(4)NH_(2)]

Answer»

2 and 2
2 and 3
3 and 2
3 and 3

Solution :`[Co(en)_(2)Cl_(2)]^(+) IMPLIES trans, CIS (O.A.) = 2`
Discussion
37.

How many isomers exist for a square planar platinum compound which has four different groups attached to the platinum atom ?

Answer»

ONE
two
three
four

Answer :C
Discussion
38.

How many isomers exist for the octahedral compound, Pt(NH_(3))_(2)Cl_(4)?

Answer»

1
2
3
4

Answer :B
Discussion
39.

How many isomers are there for the complex [Co(NH_(3))_(4)Cl_(2)]Cl? or Draw cis and trans isomers of [CoCl_(2)(NH_(3))_(4)]^(+) ion.

Answer»

SOLUTION :No structural isomers because coordination number of cobalt is 6 but two geometrical isomers, viz, CIS and trans. No OPTICAL isomerism because no didentate ligand is present.
Discussion
40.

How many isomers are there for octahedral complex [CoCl_(2)(en)(NH_(3))_(2)]^(+) ?

Answer»

SOLUTION :There will be two geometrical isomers. cis-isomer will show optical ISOMERISM ALSO. Thus, there will be a total of THREE isomers.
Discussion
41.

How many isomers are there for the complex [Co(NH_(3))_(4)Cl_(2)]Cl?

Answer»

SOLUTION :TWO GEOMETRICAL ISOMERS.
Discussion
42.

How many isomers are possible for the neutral complex, [Co(NH_(3))_(3)Cl_(3)] ?

Answer»

Solution :Only two isomers are possible, VIZ, cis and TRANS (or FAC and MER) as DRAWN below :
Discussion
43.

How many isomers are possible for the complex [Ir(CO)Cl(PPh_3)_2]?

Answer»


Solution :In COMPLEX, Ir with +1 oxidation state has `5d^8` configuration . HENCE , the complex would be square planar and diamagnetic. It will have two geometrical isomers as GIVEN below :
Discussion
44.

How many isomers are possible for the compound with molecular formula C_(4)H_(8)?

Answer»

FOUR
SIX
Seven
Eight

Answer :B
Discussion
45.

How many isomers are possible for the complex ion [Cr(NH_(3))Cl_(3)(OH)_(2)]^(2-) ?

Answer»

2
3
4
5

Solution :`[M a b_(3) C_(2)]`
Discussion
46.

How many isomers are possible for the complex ion [Cr(NH_(3))_(3)Cl_(3)] ?

Answer»

3
2
4
5

Answer :B
Discussion
47.

How many isomers are possible for molecular formula C_(3)H_(7)X ?

Answer»

2
3
4
5

Answer :A
Discussion
48.

How manyisomers are possiblefor glucosethat have 4 asymmeticcarbon atoms ?

Answer»

8 isomers
16 isomers
2 isomers
4 isomers

ANSWER :B
Discussion
49.

How many isomers are possible for an octahedral complex of the type MA_(2)B_(2)C_(2) ?

Answer»

3
4
5
6

Solution :It has five GEOMETRICAL isomers (diasteroisomers) of which one is optically active. First, the members of all THREE pairs of LIKE ligands may be either TRANS to each other or cis to each other. Then members of one of the pairs may be trans to each other, but the members of the other two pairs are cis. There is no trans-trans cis isomer. Finally cis-cis-cis isomer is optically active and thus EXIST as two enantiomers.
Discussion
50.

How many isomers are possible for C_(4)H_(9)X ?

Answer»

1
2
3
4

Answer :D
Discussion