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 octahedral and tetrahedral holes are present per unit cell in a face centred cubic arrangement of atoms ?

Answer»

8,4
1,2
4,8
2,1

Answer :C
Discussion
2.

How many O-H groups are present in phloroglucinol ?

Answer»

3
2
4
5

Answer :A
Discussion
3.

How many O-atoms are shared per SiO_(4) tetrahedral in silicate anion of beryl mineral

Answer»

4
3
2
1

Answer :A
Discussion
4.

How many octahedral and terahedral holes are present per unit cell in a face -centred cubic arrangement of atoms?

Answer»

8,4
1,2
4,8
2,1

Answer :C
Discussion
5.

How many numbers of sigma" and "pi bonds are in cyclotrimetaphosphoric acid molecules respectively ?

Answer»

12 and 6
15 and 3
14 and 4
16 and 8

Answer :B
Discussion
6.

How many O-atoms are shared for SiO_(4) tetrahedral in silicate anion of beryl mineral

Answer»

4
3
2
1

Answer :C
Discussion
7.

How many numbers of possible stereoisomers are there of 2, 3, 4-trichlo pentanoic acid ?

Answer»

8
12
16
4

Solution :`CH_(3)-overset(.)(C )HCl-overset(.)(C )HCl-overset(.)(C )HCl-COOH`,
i.e., 2,3,4 - trichloropentanoic ACID has THREE dissimilar chiral centres and hence has `2^(3)=8` STEREOISOMERS.
Discussion
8.

How many number of statements (s) are correct ? (i) XeF_(6) and IF_(5) both are distorted octahedral (ii) Bond angle of BeCl_(2) is greater than NO_(2)^(+) (iii) All bond length are equal in NO_(3)^(-) (iv) Bond order of CO_(3)^(2-) and NO_(3)^(-) is equal (v) Dipole moment of CH_(3)Cl gt CH_(3)F (vi) EA of Cl gt EA of F (vii) Radius of Zr ~~ radius of Hf (viii) Ionisation energy of Tl is greater than Al (ix) (x) Ionorganic benzene and benzene both have sp^(2) hybridised atoms.

Answer»


Solution :(i), (III), (IV), (v), (vi), (VII), (VIII),(X)
Discussion
9.

How many number of tetrahedral voids in a closed packed structure having 6 xx 10^(24) atoms?

Answer»

`6 xx 10^(25)`
`3 xx 10^(24)`
`1.2 xx 10^(-25)`
`1.2 xx 10^(23)`

SOLUTION :NUMBER of tetrahedral voids =`(6 xx 8)/(4) xx 10^(24)`
`= 1.2 xx 10^(24)`.
Discussion
10.

How many number of statement are true regarding CH_(2)F_(2) molecule. (i) It is sp^(3) hybridised (ii) It is non planar. (iii) It is polar. (iv) All bond angles are 109^(@) 28' (v) /_ F hat(C )F bond angle is greater than /_ F hat(C )H bond angle. (vi) /_ Hhat(C )H gt /_ H hat(C )F gt /_ F hat(C )F (vii) Number of /_ F hat(C )H bond angles are two. (viii) It is perfectly tetrahedral.

Answer»


SOLUTION :(i), (II), (III), (IV) are CORRECT
Discussion
11.

How many number of sigma - bond pi - electron, chlorine atom and hydrogen atom is structural formula of DDT, respectively ?

Answer»

29, 6, 5, 9
29, 12, 5, 9
28, 6, 5, 9
24, 12, 5, 8

Answer :B
Discussion
12.

How many number of P - O - P bonds in P_4 O_(10) ?

Answer»

<P>

Solution :In `P_(4)O_(10)` SIX P - O - P BONDS are present
Discussion
13.

How many number of moles of R-MgX consumed per mol for one mole of following compound ?

Answer»


SOLUTION :N//A
Discussion
14.

How many number of molecules have sp^(3)d hybridisation of central atom in their transition state during hydrolysis process? PCl_(3),PCl_(5),SiCl_(4),SF_(4),C Cl_(4),BF_(3),BCl_(3),TeF_(6),BeCl_(2) [If your answer is 5 then write the answer as 0005.]

Answer»


SOLUTION :`PCl_(3),SiCl_(4)`
Discussion
15.

How many number of isomers are possible for the compound with molecular formula C_(2)BrCIFI?

Answer»

SOLUTION :SIX ISOMERS are POSSIBLE.

Discussion
16.

How many number of lone pairs are present in central atom of C//f_(3) ?

Answer»


SOLUTION : LONE PAIRS
Discussion
17.

How many number of hybrid orbitals of Chorine are present in ClO_(4)^(-)?

Answer»


Solution : In `ClO_(4)^(-)` hybridisation of `Cl_(2)` is `sp^(3)` (i.e., 4 ORBITALS )
Discussion
18.

How many number of hybrid orbitals are present in SO_(2)?

Answer»


Solution :The CENTRAL ATOM in `SO_(2)` in sulphur. It UNDERGO `sp^(2)` hybridization. `THEREFORE` Total no. of hybrid ORBITALS = 3.
Discussion
19.

How many number of elcetrons haven m = 0 value in chromium.

Answer»

11
12
10
9

Solution :
Discussion
20.

How many number of carbon atoms are present in 1-phenyl ethanol ?

Answer»

6
7
8
9

Solution :
1-phenyl ethan-1-ol
Discussion
21.

How many number of bond pairs are present in NO_(3)^(-) ?

Answer»

Solution : `{:("T - bond pairs =3"),(PI - "bond pairs "UL(=1)),("4-bond pairs"):}`
Discussion
22.

How many number of atoms are there in a cube based unit cell having one atom on each corner and two atoms on each body diagonal of cube-

Answer»

8
6
4
9

Answer :D
Discussion
23.

How many number of alkenes are possible by dehydration of 3-bromo-3-cyclopentylhexane using alcoholic KOH?

Answer»


SOLUTION :N//A
Discussion
24.

How many nubmer of chiral centres present in the following compounds?

Answer»


ANSWER :`(##RES_CHM_SIM_E01_009_A01##)`
Discussion
25.

How many non-axial d-orbitals are involved in hybridisation of CrO_(2)Cl_(2)?

Answer»


Solution :`CrO_(2)Cl_(2)` has `d^(3)s` HYBRIDISATION and all 3 d-orbitals are non-axial which are `d_(XY),d_(xz)`,
Discussion
26.

How many no. of active Hydrogen atoms are present in compound (mol. Mass 90) 0.45 g of which when treated with Na metal liberates 112m l of the H_(2) gas at STP.

Answer»


SOLUTION :N//A
Discussion
27.

How many nitrogen is/are sp^(2). Hybridised in hydrazoic acid?

Answer»


ANSWER :6
Discussion
28.

How many nitro groups are present in picric acid?

Answer»

Solution :There are THREE (3) nitrogroup PRESENT in PICRIC acid.
Discussion
29.

How many .nearest. and. next nearest. neighbours respectively potassium have in bcc lattice ?

Answer»

8,8
8,6
6,8
8,2

Answer :B
Discussion
30.

How many 'nearest' and' next nearest' neighbours respectively potassium have in bcc lattice ?

Answer»

8,8
8,6
6,8
8,2

Answer :B
Discussion
31.

How many n-octene can show geometrical isomerism?

Answer»


ANSWER :3 (oct-2-ene,oct-3-ene,oct-4-ene)
Discussion
32.

How many monovalent oxygen atoms are preset in the mineral kinoite (overset(+2)(Ca_(2))overset(+2)(Cu_(2))Si_(3)O_(10)*2H_(2)O)?

Answer»


ANSWER :8
Discussion
33.

How many more co-ordination isomers are possible of the compound [Cu(NH_(3))_(4)][PtCl_(4)] ?

Answer»


ANSWER :3
Discussion
34.

How many monpocarboxylic acidsarepossiblewhich onedecarboxylation from iso - pentane?

Answer»

Solution :`CH_(3)-UNDERSET(CH_(3))underset(|)CH-CH_(2)-COOH,CH_(3)-underset(CH_(3))underset(|)CH-overset(COOH)overset(|)CH-CH-CH_(3),`
`CH_(3)-underset(CH_(3))underset(|)overset(COOH )overset(|) C-CH_(2)-CH_(3),HOOC-CH_(2)-underset(CH_(3))underset(|)CH -CH_(2)-CH_(3)`
FOur isomers monocarboxyylic ACIDS are possible .
Discussion
35.

How many monosaccharides are obtained by hydrolysis of sucrose?

Answer»

1
2
3
4

Answer :B
Discussion
36.

How manymonochoro structural isomers areexpectedinfree radicalmonochlorination of 2- methylbutane ?

Answer»


ANSWER :4
Discussion
37.

Howmany monochlorostrutural isomersareexpected infreeradical monochloronation of 2- methybutane ?

Answer»

2
3
4
5

Answer :C
Discussion
38.

How many monochloro derivatives are possible when 3-methylheptane is subjected to free radical chlorination?

Answer»


Solution :`overset(1)(C)H_(3)-overset(2)(C)H_(2)-overset(overset(8)(C)H_(3))underset(|)(.^(3)C)H-overset(4)(C)H_(2)-overset(5)(C)H_(2)-overset(6)(C)H_(2)-overset(7)(C)H_(3)`
All the carbon atoms are DIFFERENT and hence EIGHT monochloro derivatives are possible.
Discussion
39.

How many monochloro derivatives arepossible when 3-methylheptane is subjected to free radical chlorination ?

Answer»


Solution :`OVERSET(1)(C)H_(3)-overset(2)(C)H_(2)overset(3)(-)overset(overset(8)(C)H_(3))overset(|)(C)H-overset(4)(C)H_(2)-overset(5)(C)H_(2)-overset(6)(C)H_(2)-overset(7)(C)H_(3)`
All the carbon atoms are different and hence eight monochloro derivatives are possible.
Discussion
40.

Howmany monochlorinatedproductsare possible for thefreeradicalchorinationof 2,2- dimethylbuttane ?

Answer»


ANSWER :3
Discussion
41.

Howmany monocarboxylic acidsarePossible, whichone decarboxylationgiveneopentane?

Answer»

SOLUTION :Only onecarboxylic acidis possible .
`CH_(3)-underset(CH_(3))underset(|)OVERSET(CH_(3))overset(|)C-CH_(2)-COOH`
Discussion
42.

How many monobromo alkenes are produced during the reaction?

Answer»


Solution :10 intermediate free radicals.

So 10 STRUCTURAL isomeric PRODUCTS are FORMED and TOTAL products including stereoisomers are 33.
Discussion
43.

How many moles of sucrose should be dissolved in 500gms of water so as to get a solution which has a difference of 104^(@)C between boiling point and freezing point. (K_(f)=1.86 K Kg "mol"^(-1).K_(b)=0.52K Kg "mol"^(-1))

Answer»

`1.68`
`3.36`
`8.40`
`0.840`

Solution :Boiling POINT of solution `=` boiling point `+DeltaT_(B)=100+DeltaT_(b)`
Freezing point of solution `=` Freezing point `-DeltaT_(f)=0-DeltaT_(f)`
Diffrence in temperature (given) `=100+DeltaT_(B)-(-DeltaT_(f))`
`104=100+DeltaT_(b)+DeltaT_(f)=100+"molality"xxK_(b)+"molallity"xxK_(f)`
`=100+"molality"(0.52+1.86)`
`therefore "Molality"=(104-100)/(2.38)=(4)/(2.38)=1.68m`
and molality `=("moles"xx1000)/(W_(gm(solvent))),1.68=("moles"xx1000)/(500)`
`therefore` Moles of SOLUTE `=(1.68xx500)/(1000)=0.84` moles.
Discussion
44.

How many moles of water are present in 180 g of water

Answer»

1 mole
18 mole
10 mole
100 mole

Solution :MOLES of water `=(180)/(18)=10` mole.
Discussion
45.

How many moles of water are present in one litre of water?

Answer»


ANSWER :55.5moles
Discussion
46.

How many moles of platinum will be deposited on the cathode when 0.60 F of electricity is passed through a 1.0 M solution of Pt^(4+) ?

Answer»

0.60 mol
0.15 mol
0.30 mol
0.45 mol

Solution :`PT^(4+)(aq)+underset(0.6F)underset(4F)4E^(-) to underset(((1mol)XX(0.6F))/((4F))=0.15" mol")underset(1" mol")(Cu(s))`
Discussion
47.

How many moles of R will be produced when 8 mol of P and S mol of Q are allowed to react according to the equation? 2P+QrarrR

Answer»


ANSWER :4
Discussion
48.

How many moles of P_(4)O_(6) and P_(4)O_(10) will be produced by the combustion of 12.4 g of phosphorous (atomic mass 31) in 12.8 g ofoxygen, leaving no P_(4) or O_(2) ?

Answer»

0.1 and 0.3 mol
0.15 mol and 0.25 mol
0.05 mol each
0.1 mol each

Solution :Moles of `P_(4)= (12.4)/(4 xx 31) = 0.1`
Moles of `O_(2)= (12.8)/(32)=0.4`
Let x moles of `P_(4)` from `P_(4)O_(6)` .
Then, moles of `O_(2)` REQUIRED `= x xx 3+(0.1- x) xx 5=0.4`
(given) `implies x = 0.05`
Discussion
49.

How many moles of OH^(-) are involved in the balanced equation ? C_(2)H_(5)OH + I_(2) overset(OH^(-))rarrCHI_(3) + HCOO^(-) + I^(-) + H_(2)O

Answer»


ANSWER :6
Discussion
50.

How many moles of O-atoms are there in 1 mole CaCO_(3)

Answer»


ANSWER :`(##ALN_NC_CHM_MC_E01_012_A01##)`
`2N_(A)`
Discussion