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 particles are present in a unit cell of fcc ?

Answer»

SOLUTION :4 ATOMS.
Discussion
2.

How many pairs are, in which first species has lower ionisation enegy than second species: (i) N and O (ii) Br and K (iii) Be and B (iv) I and I^(-) (V) Li and Li^(+) (vi) and O and S (vii) Ba and Sr.

Answer»


SOLUTION :(V) `LI lt Li^(+)`
(VII) `Ba lt SR`
Discussion
3.

How many P- P - P angle are present in P_(4) molecule ?

Answer»

8
12
6
10

Answer :B
Discussion
4.

Give the number of characteristic bond(s) found in the various oxy-acids of phosporous as given below. (a) Number of P-O-P bond(s) in tricyclometaphosphoric acid. (b) Number of P-P bond(s) in hypophosphoric acid (c) Number of P-OH bond(s) in pyrophosphoric acid. (d) Number of P-H bond(s) in hypophosphorous acid.

Answer»

TWO
THREE
FOUR
One

Answer :C
Discussion
5.

How many P-OH bonds are present in H_3PO_2

Answer»

1
2
3
0

Answer :A
Discussion
6.

How many oxygen atoms are shared per SIO_4 tetrahedral in Beryl ?

Answer»


SOLUTION :
BERYL is CYCLIC SILICATE with `[Si_6O_18]^(-12)` anion. In which two oxygen atoms are shared per `SiO_4` TETRAHEDRAL.
Discussion
7.

How many p =O bondsandP - OH bonds (respectively )are present in orthophosphoric acid ?

Answer»

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

ANSWER :C
Discussion
8.

How many oxides are soluble in moderaterly concentrated aqueous solution of NaOH. {:(SO_3",",Cl_2O_7",",N_2O_5",",CO),((1),(2),(3),"(4)"),(K_2O",",Cr_2O_3",",BaO",",GeO_2),((5),(6),(7),"(8)"):}

Answer»


Solution :`SO_2 ,Cl_2O_7, N_2O_5, GeO_2` Acidic
`Cr_2O_3` Amphoteric
`K_2O` Bao Basic
CO , Neutral
Reactions :
`SO_2+2NaOHtoNa_2SO_4+H_2O`
`Cl_2O_7+2NaOHto2NaClO_4+H_2O`
`N_2O_5+2NaOHto2NaClO_4+H_2O`
CO+NaOH`to` No reaction
`K_2O+NaOHto` No reaction but `K_2O+H_2Oto2KOH`
BaO+NaOH`to` No reactionbut BaO +`H_2OtoBa(OH)_2`
`Cr_2O_3+2NaOH+3H_2Oto2Na(CR(OH)_4]`
`GeO_2+2NaOHtoNa_2GeO_3+H_2O`
Discussion
9.

How many out of the following reagents will change 1- propanol into propanaldehyde? (a ) H^(+)//KMnO_(4)//(/_\) (b )TsCl / DMSO + NaHCO_(3) (c ) P.C.C(pyridinium chloro chromate) (d ) Bendict solution (e )Red hot Cu tube ( f) H^(+)//K_(2)Cr_(2)O_(7)//(/_\) ( g) NBS//(/_\) ( h) SeO_(2)//(/_\)

Answer»


SOLUTION :N//A
Discussion
10.

How many out of [TiF_6]^(2-), [CoF_6]^(3-) , Cu_2Cl_2 and [NiCl_4]^(2-) are colourless ? (Ti =22, Co = 27 , Cu = 29 , Ni = 28)

Answer»

0
2
3
1

Answer :B
Discussion
11.

How many orders among following are correct with respect to the properties indicated : {:((1)NH_3ltH_2OltH_2S,"Boiling point"),((2)PH_3ltAsH_3ltNH_3ltSbH_3,"Boiling point"),((3)BF_3ltBCl_3ltB Br_3,"Extent of hydrolysis"),((4)CH_3ClgtCH_3FgtCH_3BrgtCH_3I,"Dipole moment"),((5)BF_3ltBCl_3ltB Br_3,"Lewis acidic strength"),((6)Na^+ gtMg^(+2)Al^(+3),"Extent of hydration"):}

Answer»


SOLUTION :NA
Discussion
12.

How many orbitals, contains at least one electron in the ground state electronic configuration of Chromium atom? [Divide answer by 5]

Answer»

SOLUTION :`CR[24]=

0015
Discussion
13.

How many optically active stereoisomers are possible for butane-2,3-diol

Answer»

2
1
4
3

Answer :A
Discussion
14.

How many optically active stereoisomers are possible for butane-2,3-idol:

Answer»

1
2
3
4

Answer :B
Discussion
15.

How many optically active stereomers are possible for butane-2,3-diol

Answer»

3
4
1
2

Solution :`{:(""CH_(3)),("|"),(H-C_(**)-OH),("|"),(H-C^(**)-OH),("|"),(""CH_(3)),("butane-2,3-diol"):}` No. of asymmetric of CHIRAL carbon =2 , THEREFORE no. of optical isomers `= 2^(n) = 2^(2) = 4`, No. of optically active stereomers = 4-1=3, because MESO COMPOUND isoptically INACTIVE due to internal compensation.
Discussion
16.

How many optically active stereomers are possible for butane - 2,3- diol ?

Answer»

3
4
1
2

Solution :
No. of asymmetric or chiral carbon= 2
THEREFORE no. of OPTICAL ISOMERS `=2^(n)=2^(n)=4`
No . Ofoptically ACTIVE steremers `=4-1=3`, because SESO compound is optically inactive due to internal compensation.
Discussion
17.

How many optically active stereoisomers are possible for butane-2, 3 diol

Answer»

1
2
3
4

Solution :`{:(CH_(3)-overset(**)(C)H-overset(**)(C)H-CH_(3)),("|""|"),(""OH" "OH):}`
In it two asymmetric C-atoms and a plane of symmetry are present. So optically ACTIVE ISOMERS `= 2^(N+1) = 2^(2-1) = 2`
(n = No. of asymmetric carbon atoms.)
Discussion
18.

How many of these reactions are homogeneously catalyzed ? (i) 2SO_(2)(g) + O_(2)(g) overset(NO(g))to 2SO_(3)(g) (ii) C_(12)H_(22)O_(11)(aq.) + H_(2)O(l) overset(H_(2)SO_(4)(l))to underset("Glucose")(C_(6)H_(12)O_(6)(aq.)) + underset("Fructose")(C_(6)H_(12)O_(6)(aq.)) (iii) 2SO_(3)(g) + O_(2)(g) overset(Pt(s))to 2SO_(3)(g) (iv) N_(2)(g) + 3H_(2)(g) overset(Fe(s))to 2NH_(3)(g) (v) 4NH_(3)(g) + 5O_(2)(g) overset(Pt(s))to 4NO(g) + 6H_(2)O(g) (vi) CH_(3)COOCH_(3)(l) overset(HCl(l))to CH_(3)COOH(aq) (vii) Vegetable oils (l) + H_(2)(g)overset(Ni(s))to Vegetable ghee (s).

Answer»


ANSWER :`(I, II, VI)`
Discussion
19.

How many optically active isomers of 2,3-Dichlorobutandioic acid are possible ?

Answer»


SOLUTION :`HOOC-undersetunderset(Cl)(|)CH-undersetunderset(Cl)(|)CH-COOH`
THREE ISOMERS (R,R), (S,S) and (R,S) MESO are possible . Out of which only two are optically active.
Discussion
20.

How many optically active forms are possible for a compound of the formula,

Answer»

2
4
3
8

Answer :D
Discussion
21.

How many optical isomers are possible for C_(5)H_(11)Cl?

Answer»

SOLUTION :The NUMBER of OPTICAL ISOMERS : 3.
Discussion
22.

How many one pairs of electrons are present on the chlorine atom in ClO_(4)^(-)

Answer»

0
1
2
3

Solution :`ClO_(4)^(-)` has no LONE PAIRS on CL.
Discussion
23.

How many of these orbitals have maximum orbital angular distribution is maximum at an angle of 45^(@) to the axial direction. d_(xy), d_(x^(2)-y^(2)) d_(yz), d_(xz), d_(z^(2)), P_(x) P_(y)P_(z), s

Answer»


ANSWER :3
Discussion
24.

How many -OH groups are present in a trimetaphosphoric acid ?

Answer»

4
5
6
10

Answer :B
Discussion
25.

How many of these molecules can have any type of hydrogen bonding. Glucose, HF, -OH, R-COOH, R_(2)NH, "CCl"_(3)CHO,Ph-Br, " o - nitro phenol", PH_(3).

Answer»


ANSWER :`7.00`
Discussion
26.

How many of these molecules are diamagnetic and have bond order more than 2 O_(2)^(2+), CO, overset(-)CN, NO, NO^(+), N_(2), O_(2)^(+), N_(2)^(2-), O_(2)^(2-)

Answer»


ANSWER :`5.00`
Discussion
27.

How many of these metals carbon reduction is used during their extraction. Ag, Au, Fe, Sn, Zn, Pb, Al

Answer»


ANSWER :4
Discussion
28.

How many of these metals can be purified by vapour phase refining Ni, Ti, Zr, Ge, In, Fe, Cu, Au

Answer»


ANSWER :3
Discussion
29.

How many of these acids are here? H_(3)PO_(2), H_(3)PO_(3), H_(2)CO_(3), H_(2)SO_(4), H_(2)S_(2)OP_(4), H_(2)CrO_(4), H_(3)BO_(3), HNO_(2)

Answer»


ANSWER :3
Discussion
30.

How many of these gives name osazone with PhNHNH_(2):

Answer»


SOLUTION :GLUCOSE, FRUCTOSE and MANOSE.
Discussion
31.

Howmany of these days acids are mobobasic in nature? H_(2)S, H_(2)O_(2), H_(3)O_(2), HCOOH,H_(3)BO_(3),H_(3)PO_(2), HXO_(4), Ph-SO_(3)H

Answer»


ANSWER :4
Discussion
32.

How many of these compounds are more reactive towards electrophilic substitution reaction than toluene. Phenol, Anlline, Anisole, Benzaldehyde, Chorobenzene,

Answer»


ANSWER :5
Discussion
33.

How many of the structurally isomeric pentyl alcohols will produces immediate turbidity in Lucas test

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SOLUTION :Only `3^(@)` alcohols immediately give turbidity in the Lucas TEST. The only `3^(@)` ALCOHOL is
`CH_(3)-underset(OH)underset(|)overset(CH_(3))overset(|)C-CH_(2)CH_(3)`
Discussion
34.

How many of the structurally isomeric pentyl alcohols will produce immediate turbidity in Lucas test?

Answer»


SOLUTION :Only `3^(@)` ALCOHOLS IMMEDIATELY give turbidity in the Lucas TEST. The only `3^(@)` alcohol is (vi).
Discussion
35.

How many of the given statements are true for potash alum. (1) it is a white crystalline solid (2) it swells up on heating (3) it imparts a golden yellow colour to the bunsen flame (4) An aqueous solution of the above given a white gelatinous precipitate with BaCl_(2) solution soluble only in concentrated sulphuric acid. (5) An aqueous solution of the above given a white gelatinous precipitate on treatment with NH_(4)OH. Which dissolves in aqueous NaOH in excess and reappears, On boiling with concentrated NH_(4)Cl solution. (6) It gives a yellow precipitate with Cobalt nitrile solution. (7) White precipitate in 5^(th) state can also be obtained by passing H_(2)S gas in aqueous solution of the above.

Answer»

Solution :(1)`K_(2)SO_(4)Al_(2)(SO_(4))_(3)` is a white crystaline solid.
(2)upon HEATING it swells up DUE to the evolution of water MOLECULES.
`K_(2)SO_(4)Al_(2)(SO_(4))_(3).24H_(2)O overset(Delta)toK_(2)SO_(4)Al_(2)(SO_(4))_(3).24H_(2)O`
(3)because of presence of potassium it imparts.Voilet color to bunsen flame.
(4)`Ba^(2+)+SO_(4)^(2-)to underset("whiteppt.")(BaSO_(4)darr`
`BaSO_(4)+H_(2)SO_(4) to Ba(HSO_(4))_(2)` Soluble
(5)`Al^(3+)+30H^(-)to underset("white")(Al(OH)_(3))darr overset(NaOH)to underset("soluble")(NaAeO_(2)) overset(NH_(4)Cl)to Al(OH)_(3) darr`
(6)`4K^(+)+[CO(NO_(2))_(6)]^(4+)to underset("yellow ppt")(K_(4)[CO(NO_(2))_(6)])`
(7)`2AL^(3+)+3S^(-2)to Al_(2)S_(3)underset("Hydrolysis")overset(H_(2)O)to underset("whiteppt.")(Al(OH)_(3) darr)`
Discussion
36.

How manyof thegivennucleophiles will predominantly givesubstitutionreactionwith 3-bromo -cyclohexene? overset(Theta)(NH_(2)) HC = overset(Theta)(C ) CH_(3)CO bar(O), overset(Theta)(N_(3)) bar (O)H, C bar(N) , (CH_(3))_(3) C bar(O) , CH_(3) bar(O) , bar(B )H

Answer»
Discussion
37.

How many of the isomeric ketones having the molecular formula C_(6)H_(12)O undergo iodoform test?

Answer»


Solution :Four ISOMERIC ketones. i.e.,
`CH_(3)COCH_(2)CH_(2)CH_(2)CH_(3),CH_(3)COCH(CH_(3))CH_(2)CH_(3),CH_(3)COCH_(2)CH(CH_(3))_(2) and CH_(3)COC (CH_(3))_(3)` UNDERGO iodoform test.
Discussion
38.

How many of the given reaction will form tert-Butyl ethyl ether? I) tert - Butanol + Ethanol overset(H^(+)) to (II) tert-Butyl bromide + Sodium ethoxide to (III)Sodium tot-butoxide + Ethyl bromide to (iv)Isobutene + Ethanol overset(H^(+)) to

Answer»


Solution :`(CH_(3))_(3)CBr + NaOC_(2)H_(5)` can’t be applied for synthesising the ether because sod. ETHOXIDE, being a strong base, will PREFERENTIALLY cause elimination reaction.
`(CH_(3))_(3)CBr overset(""^(-)OC_(2)H_(5))to (CH_(3))_(2)C = CH_(2) + HBr`
Rest other forms tert-Butyl ethyl ether.
Discussion
39.

How many of the given complexes follow E.A.N rule ? (a) [Fe(CO)_(5)](b) [Co_(2)(CO)_(8)] ( c) [Fe(C_(5)H_(5))_(2)] (d) K_(3)[Fe(CN)_(6)] ( e)[Fe(NO)_(2)9CO)_(2)] (f)[CoF_(6)]^(4-)

Answer»


SOLUTION :(d) `K_(3)[FE(CN)_(6)]=26-3+2xx6=35` does not follow E.A.N. rule.
(f) `[CoF_(6)]^(4-)=27-2+2xx6=37` does not follow E.A.N. rule.
Discussion
40.

How many of the given metals can be obtained by carbon reduction in their extractive metallurgy

Answer»


ANSWER :4
Discussion
41.

How many of the following will volatilize on heating leaving no solid residue ? (i) NaNO_(3) "" (ii) NH_(4)NO_(3) "" (iii)Ca(H_(2)PO_(2)) "" (iv) NH_(4)HCO_(3) (v)N_(2)H_(5)HSO_(3) "" (vi)AlCl_(3) "" (vii) [Cu(NH_(3))_(4)]SO_(4) "" (viii) FeSO_(4), 7H_(2)O

Answer»


Solution :`NH_(4)NO_(3) OVERSET(Delta)to N_(2)O uarr + 2H_(2)O uarr`
`NH_(4)HCO_(3) UNDERSET(Delta)to NH_(3) uarr +H_(2)O uarr+CO_(2)uarr`
`N_(2)H_(5)HSO_(3) underset(Delta)to N_(2)H_(4) uarr + H_(2)O uarr+SO_(2) uarr`
`AlCl_(3) underset(Delta)to AlCl_(3)(g)`(sublimes)
Discussion
42.

How many of the following will have (M-O-M) oxylinkage ? P_(4)O_(6), P_(4)O_(8), P_(4)O_(10), P_(4)S_(6), P_(4)S_(3), H_(2)S_(3)O_(6), H_(7)P_(5)O_(16), H_(4)P_(2)O_(8), H_(2)S_(2)O_(8), H_(2)S_(2)O_(6)

Answer»


ANSWER :4
Discussion
43.

How many of the following will give O_2 on heating ? KMnO_4, K_2,Cr_2O_7, ZnO,Na_2O, PbO_2,Pb_3O_4,Pb(NO_3)_2 , NH_4NO_3

Answer»


SOLUTION :`KMnO_4 overset(Delta) rarr MnO_2 + K_2MnO_4 + O_2`
`K_2 Cr_2O_7 overset(Delta) rarr K_2CrO_4 + Cr_2 O_3 + O_2`
`ZnO overset(Delta) rarr O^(-2) rarr O_2+ 2E^(-)` (CRYSTAL deffect )
`PbO_2 rarr PbO + O_2`
`Pb_(3)O_4 rarr PbO + O_2`
`PB(NO_3)_2 rarr PbO + NO_2 + O_2`
`NH_4 NO_3 rarr N_2O + H_2O`
Discussion
44.

How many of the following will give 2,4-DNP test. 1.CH_(3)CH=O "" (2) CH_(3)-overset(O)overset(||)(C)-CH_3 "" (3) Ph-CH=O "" (4) Ph-overset(O)overset(||)(C)-CH_(3) Glucose (Aldose)(6) Fructose (Ketose)(7) HCOOH(8) Ph-NH-OH

Answer»


ANSWER :A::B::C::D
Discussion
45.

How many of the following terms are directly associated with Pb(lead)?(Pattinson process,Sindoor,Calcium plumbate,Cinnabar,Solder,Bronze,Wolframite Liquation,Self reduction

Answer»


ANSWER :6
Discussion
46.

How many of the following the second element has higher density than the first one? 1) Ag, Au 2) Hf, Zr, 3) Zn, Hg 4) Na, Cu 5) Ca, Co 6) Ta, Nb

Answer»


SOLUTION :1,2,3,4,5 has SECOND ELEMENTWITH HIGH DENSITY
Discussion
47.

How many of the following will form stable hydrate :

Answer»


ANSWER :5(2,3,4,5,6)
Discussion
48.

How many of the following substances are more acidic than phenol? O-cresol, m-cresol, water, methyl alcohol, ethyl alcohol, 2,4-dimethylphenol, p-ethylphenol, diimethylcarbinol.

Answer»


SOLUTION :all alcohols and phenols having electron-donating groups are less acidic than phenol, i.e., all. In ORDER WORDS ANS. Is zero.
Discussion
49.

Which of the following substance gives a positively charged sol?

Answer»


Solution :`Fe(OH)_(3)` particles absorb `Fe^(3+)` ions and GET peptized to give a POSITIVELY charged SOL. SIMILARLY AgCl particles absorbs `Ag^(+)` ions to give a positively charged sol.
Discussion
50.

How many of the following statements is/are INCORRECT regarding ortho hydrogen and para hydrogen? (i) number of neutron in ortho hydrogen is greater than that in para hydrogen. (ii) nuclear spins are parallel in para hydrogen while opposite in ortho hyudrogen. (iii) classification of these two is done based upon electronic spin. (iv) chemical properties are same for both. (v) physical properties are different for them. (vi) para hydrogen is more stable compared to ortho hydrogen. (vii) conversion of 100% ortho hydrogen is possible at high temperature.

Answer»


ANSWER :D
Discussion