CHEMISTRY

Q1. Mole fraction ofsolvent in 0.2 mbinary aqueous solution of camphor (m = molality)
(A) 0.996 (B) 0.004 (C) 0.96 (D) 0.976
Q2. Volume V1
mlof0.1 M K2
Cr2
O7
is needed for complete oxidation of0.678g N2
H4
inacidic medium.
The volume of 0.3 M KMnO4
needed for same oxidation in acidic medium will be
(A) 1
V
5
2
(B) 1
V
2
5
(C) 113 V1
(D) can't say
Q3. Ocidation state of sulphur in Caro's acid, H2
SO5
is
(A) +8 (B) +6 (C) +3 (D) - 2
Q4. The molarity of Cl-
in an aqueous solution which was (w/V) 2% NaCl, 4% CaCl2
and 6% NH4
Cl
will be
(A) 0.342 (B) 0.721 (C) 1.12 (D) 2.18
Q5. The molar ratio of Fe++
to Fe+++
in a mixture of FeSO4
and Fe2
(SO4
)3
having equal number of
sulphate ion in both ferrous and ferric sulphate is
(A) 1 : 2 (B) 3 : 2 (C) 2 : 3 (D) can't be determined
Q6. How manymg of quick lime is required to remove hardness of 1 Kg of hard water having 366 ppm
of HCO3
and Ca++
as the only cation
(A) 72 mg (B) 84 mg (C) 168 mg (D) 170 mg
Q7. DNAhas density1.1 gm/ml and its molecular weight is 6 x 103
g/mol.Average volume occupied by
its single molecule will be
(A) 9.1 x 10-20
cc (B) 9.1 x 10-21
cc (C) 9.8 x 10-21
cc (D) 9.6 x 10-20
cc
Q8. How many ml of 0.3M K2
Cr2
O7
(acidic) is required for complete oxidation of 5 ml of 0.2 M
SnC2
O4
solution
(A) 3.33 ml (B) 2.22 ml (C) 11 ml (D) 4.44 ml
Q9. In the balanced chemical reaction:






 OH
)
OH
(
dFe
)
OH
(
cCr
O
H
4
)
OH
(
bFe
aCrO 3
3
2
2
2
4
the value of a, b, c and d are respectively
(A) 1, 4, 3, 1 (B) 1, 3, 1, 3 (C) 1, 3, 4, 1 (D) 3, 4, 3, 1
Q10. In which of the compound(s) Iodine has positive oxidation state
(A) Iodoform (B) I2
O5
(C) ICl (D) HIO3
Q11. For the conversion of 0.240 g NaH2
PO4
in a solution to monohydrogen phosphate, 21.4 ml NaOH
solution is needed. The molarity of NaOH solution will be
(A) 0.093 (B) 0.93 (C) 0.087 (D) 0.083
Q12. 22.7 ml of N/10 Na2
CO3
solution neutralises 10.2 ml of dilute H2
SO4
. Then the volume of water
that must be added to 400 ml of same H2
SO4
to make it exactly N/10 is
(A) 245 ml (B) 484.6 ml (C) 480 ml (D) 490.2 ml
Q13. The volume of NH3
(at STP) needed to pass into 30 ml of 1N H2
SO4
solution to bring down its
strength to M/10 is
(A) 0.5 litre (B) 636 ml (C) 537.6 ml (D) 540.3 ml

Q14. 1.0 gm ofa mixture ofCaCO3
and NaCl reacts completelywith120 mlofN/10 HCl. The percentage
of NaCl in the mixture is
(A) 40% (B) 50% (C) 60% (D) 66%
Q15. 50 g of 8% by mass NaOH is mixed with 100 g of 8% by mass of HCl, the resulting solution is
(A) acidic (B) basic (C) neutral (D) strongly basis
Q16. 0.62g Na2
CO3
. xH2
O completely neutralises 100 ml of N/10 H2
SO4
. The value of x muxt be
(A) 1 (B) 6 (C) 8 (D) 10
Q17. How many litre of O3
at STP will be needed to completely oxidise 10 ml of 0.4M KI into I2
(A) 0.448 (B) 0.0448 (C) 4.48 (D) 2.24
Q18. How many moles of FeCr2
O4
can be oxidised completely by 1 mole of KMnO4
in acidic medium.
(A) 7 (B) 5 (C) 7/5 (D) 5/7
Q19. A sample of Ca3
(PO4
)2
contains 3.1 g phosphorous, the weight of Ca in the sample is
(A) 6 gm (B) 4 gm (C) 2 gm (D) 5.56 gm
Q20. For an infinitelydilute aqueous solution molality willbe equal to
(A) formality (B) molarity (C) mole fraction (D) ppm
Q21. KI + I2
+ HNO3 HIO3
+ KIO3
+ NO2
If 3 mole ofKI & 2 moles I2
are reacted with excess ofHNO3
, volume ofNO2
gas evolved at NTP is
(A) 716.8Lt (B) 1075.2Lt (C) 44.8Lt (D) 67.2Lt
Q22. Ifapieceofirongains 10%ofits weight dueto partialrusting into Fe2
O3
. thepercentage oftotalironthat
has rusted is
(A) 23 (B) 13 (C) 23.3 (D) 25.67
Q23. Inwhichofthe following reactionequivalent weight ofoxidant is not difined
(A) 2BrO3
-
+ 12H+
+ 10e-
 Br2
+ 6H2
O
(B) BrO3
+ eH+
+ 6e-
 Br-
+ 3H2
O
(C) 3Br2
+ 6CO3
+ 3H2
O  5Br-
+ BrO3
+ 6HCO3
(D) CaOCl2
+ H2
O  Ca(OH)2
+ Cl2
Q24. In whichofthe following redoxreaction'n' factor ofeveryreactant is non fractional
(A) CsBr + Br2  CsBr3
(B) Mn3
O4 Mn++
(C) KI + I2 
 
water KI3
(D) NaNH2
+ N2
O NaN3
+ H2
O
Q25. How manymole ofelectron is needed for reduction ofeach mole ofCr in the reaction
CrO5
+ H2
SO4 Cr2
(SO4
)3
+ H2
O + O2
(A) 4 (B) 3 (C) 6 (D) 7
Q26. To prepare 0.5M KClsolution from100 ml of 0.40 M KCl
(A) add 0.745 g KCl (B) add 20 mlofwater (C) add 0.1 mole KCl (D) evaporate 10 mlofwater
Q27. Themoles ofAmmoniumsulphate needed to react withonemoleofMnO2
inacidicmediumina reaction
giving MnSO4
and (NH4
)2
S2
O8
is
(A) 2 (B) 1/2 (C) 1 (D) 1/3

Q28. A 20 ml(specific gravity 1.02) ofchlorine water is treated with excess ofKI and thr liberated iodine
required 25 mlof 0.2N Na2
S2
O3
. The percentage offree chlorine inchlorine water is
(A) 0.87 (B) 87 (C) 0.78 (D) 0.82
Q29. An oreofiron, Wustite has the formula Fe0.93
O1.00
. The mole fraction oftotaliron present intheformof
Fe(II) is
(A) 0.82 (B) 0.85 (C) 0.15 (D) 0.37
Q30. If1 gmofHCland 1 gmofMnO2
heated together the maximumweight ofCl2
gas evolved willbe
(A) 2 gm (B) 0.975 gm (C) 0.486 gm (D) 0.972 gm
Q31. 35mlsample ofhydrogenperoxide gives off500 mlofO2
at 27o
C and 1atmpressure. Volume strength
of H2
O2
sample willbe
(A) 10 volume (B) 12.8 volume (C) 11 volume (D) 12 volume
Q32. When 143.6 mg ZnSO4
. xH2
O is heated strongly in the absence of air, 40.5 mg yellow residue is
obtained. Value ofx is
(A) 7 (B) 5 (C) 6 (D) 2
Q33. Percentage of free SO3
in an oleumbottle labelled 113.5% H2
SO4
is
(A) 40 (B) 60 (C) 50 (D) 45
Q34. For 1.34 x 10-3
moles of KBrO3
to reduce into bromide 4.02 x 10-3
mole of Xn+
ion is needed. New
oxidationstate ofX is
(A) n + 2 (B) n - 2 (C) 2 (D) -2
Q35. Each molecule of tear gas, Lewisite contains 2 Hydrogen atoms, 1.78 x 10-22
gm. Chlorine, 2 carbon
atoms and 1.25 x 10-22
gmofan unknown metal. Its molecular weight willbe
(A) 206 (B) 207.5+1 (C) 280 (D) 280.8
Q36. We have three separate solutions of KCl, MgCl2
andAlCl3
. The concentration of Cl-
ionis same in all
three solution. Whichsolutionwillrequiretheleast volumeto coagulate(precipitate)anegativelycharged
colloidalsolution.
(A) KClsolution (B) MgCl2
solution (C) AlCl3
solution (D) Allthe same
Q37. What volumeof0.3N Cr2
O7
--
/H+
is needed for complete oxidation of200 mlof0.6M FeC2
O4
soution.
(A) 1.2 cc (B) 1.2 Litre (C) 120 cc (D) 800 cc
Q38. 25 ml of Na2
CO3
solution requires 100 ml of 0.1N HCl to reach end point with Phenolphthalein as
indicator. Molarityofresultingsolutionwithrespect to HCO3
-
ion
(A) 0.008M (B) 0.004M (C) 0.16M (D) 0.08M
Q39. Whichconcentrationofa solutionwillchange onheating a solution
(A)molality (B)mole fraction (C)volume strength (D) %(W/V)
Q40. 5 gmofa metalcarbonate onheating stronglyreleases 1.51 litre CO2
gas at STP. Theequivalent weight
ofmetalis
(A) 7 (B) 23 (C) 21 (D) 5
Q41. Ifequal volumes of0.1M KMnO4
and 0.1M K2
Cr2
O7
solutions are allowed to oxidise. Fe2+
to Fe3+
in
acidic medium, then Fe2+
oxidised willbe
(A) more by KMnO4
(B) more by K2
Cr2
O7
(C) equalin both cases (D) can't be determined.

Q42. Equivalent weight ofMnO4
-
inacidic, basic and nuetralmediumare in the ratio of
(A) 3 : 5 : 15 (B) 5 : 3 : 1 (C) 5 : 1 : 3 (D) 3 : 15 : 5
Q43. Cl2
reacts withhot NaOH solution, oxidation number ofchlorinechanges from
(A) -1 to 0 (B) 0 to -1 (C) 0 to +5 (D) b; c.
Q44. MolarityofH2
SO4
is 18 M. Its densityis 1.8 g/cm3
, hence molalityis
(A) 18 (B) 100 (C) 36 (D) 500
Q45. x gofthe metalgaveyg ofits oxide. Hence equivalent weight ofthe metal
(A) 8
x
x
x
y 
(B) 8
x
)
x
y
(
x

(C) 8
x
y
x
(D) 8
x
x
y
x 
Q46. Mole fraction of ethyl alcohol in aqueous ethyl alcohol solution is 0.25. Hence percentage of ethyl
alcoholbyweight is
(A) 54% (B) 25% (C) 75% (D) 46%
Q47. 254g ofIodineand 142 g ofChlorineare made to react completelyto give a mixture ofICland ICl3
.The
moles ofeachone formed is
(A) 0.1M ICl and 0.1M ICl3
(B) 1.0M ICl and 1.0M ICl3
(C) 0.5M ICl and 0.1M ICl3
(D) 0.5M ICl and 1.0M ICl3
Q48. 0.1MofMnO4
-
(inacidicmedium)can(Assumethevolumeofreducingagent willbesameintheMnO4
-
)
(A) oxidise 0.25M C2
O4
2-
(B) oxidise 0.5M Fe2+
(C) oxidise 0.166M FeC2
O4
(D) oxidise 0.6M Cr2
O7
2-
Q49. Whichofthe following are redoxreactions?
(A) Zn + 2HCl ZnCl2
+ H2
(B) Al(OH)3
+ 2HCl AlCl3
+ 3H2
O
(C) Disproportionation ofCu+
ionsin agave solution (D) Ag+
(aq.) + I-
(aq.) AgI(s)
Q50. Inwhichofthe following species, valencyand oxidationnumbers havedifferent numericalvalues?
(A) CO2
(B) CH4
(C) CHCl3
(D) CCl4