1.
|
Based on the first law of
thermodynamics, which one of the following is correct?
(A) For an isochoric process, ΔU = -q
(B) For an isochoric process, q = +w
(C) For a cyclic process, q = -w
(D) For an adiabatic process, ΔU = -w
|
Answer: (C)
|
2.
|
DG0
Vs T plot in the Ellingham's diagram slopes downwards for the reaction
(A) Mg
+ O2
® MgO
(B) 2Ag
+ O2
® Ag2O
(C) C +
O2
® CO
(D) CO
+ O2
® CO2
|
Answer: (C)
|
3.
|
a-maltose consists of
(A) two a-D-glucopyranose units with 1-2 glycosidic
linkage
(B) one a-D-glucopyranose units and one b-D-glucopyranose unit
with 1-2 glycosidic linkage
(C) two a-D-glucopyranose units with 1-4 glycosidic
linkage
(D) two
b-D-glucopyranose units with 1-4
glycosidic linkage
|
Answer: (C)
|
4.
|
0.06 mole of
KNO3 solid is added to 100 cm3 of water at 298 k. The
enthalpy of KNO3aq solution is 35.8 kJmol-1.
After the solute is dissolved the temperature of the solution will be
(A) 293
k
(B) 298
k
(C) 301
k
(D) 304
k
|
Answer: (A)
|
5.
|
1 × 10–3 m
solution of Pt(NH3)4Cl4 in H2O shows depression in
freezing point by 0.0054°C. The structure of the compound will be (Given Kfp(H2O)
= 1.860 km–1)
(A) [Pt(NH3)4]Cl4
(B) [Pt(NH3)3Cl]Cl3
(C) [Pt(NH3)2Cl2]Cl2
(D) Pt(NH3)Cl3]Cl
|
Answer: (C)
|
6.
|
1.2 g of organic compound on Kjeldahilization
liberates ammonia which consumes 30 cm3 of 1 N HCl. The
percentage of nitrogen in the organic compound is ______.
(A) 35
(B) 30
(C) 20.8
(D) 46.67
|
Answer: (A)
|
7.
|
50 cm3 of 0.2 N HCl is titrated against 0.1 N NaOH solution. The titration was discontinued after adding 50 cm3 of NaOH. The remaining titration is completed by
adding 0.5 N KOH. The volume of KOH required for completing the titration is
(A) 12 cm3
(B) 10 cm3
(C) 21.0 cm3
(D) 16.2 cm3
|
Answer: (B)
|
8.
|
9.65 coulombs of electric current is passed
through fused anhydrous MgCl2. The magnesium metal thus obtained
is completely converted into a Grignard reagent. The number of moles of
Grignard reagent obtained is
(A) 1 ´ 10–4
(B) 5 ´ 10–4
(C) 1 ´ 10–5
(D) 5 ´ 10–5
|
Answer: (D)
|
9.
|
A buffer solution contains
0.1 mole of sodium acetate dissolved in 1000 cm3 of 0.1 M acetic acid. To the above buffer solution,
0.1 mole of sodium acetate is further added and dissolved. The pH of the
resulting buffer is ______.
(A) pKa + 1
(B) pKa
(C) pKa + Log 2
(D) pKa = Log 2
|
Answer: (C)
|
10.
|
A chemical reaction proceeds into the following steps
Step I, 2A Ý
X fast
Step II, X + B Ý
Y slow
Step III, Y + B Ý
Product fast
The rate law for the overall reaction is
(A) Rate = k[A]2
(B) Rate = k[B]2
(C) Rate = k[A][B]
(D) Rate = k[A]2[B]
|
Answer: (D)
|
11.
|
A mixture of CaCl2 and
NaCl weighing 4.44 g is treated with sodium carbonate solution to precipitate
all the calcium ions as calcium carbonate. The calcium carbonate so obtained
is heated strongly to get 0.56 g of CaO. The percentage of NaCl in the
mixture is
[Atomic mass of Ca = 40]
(A) 75
(B) 31.5
(C) 40.2
(D) 25
|
Answer: (A)
|
12.
|
A plot of In k
against (abscissa)
is expected to be a straight line with intercept on ordinate axis equal to
(A)
(B)
(C)
(D) R ´ DS°
|
Answer: (B)
|
13.
|
A radioactive
atom emits
two a particles and one b particle successively. The number of
neutrons in the nucleus of the product will be
(A) X –
4 – Y
(B) X –
Y – 5
(C) X –
Y – 3
(D) X –
Y – 6
|
Answer: (B)
|
14.
|
A solution is
0.1 M with respect to Ag+,
Ca2+, Mg2+ and AI3+ which
will precipitate at lowest concentration of [] when solution of Na3PO4
is added?
(A) Ag3PO4(Ksp = 1 × 10–6)
(B) Ca3(PO4)2(Ksp = 1 × 10–33)
(C) Mg3(PO4)2(Ksp = 1 × 10–24)
(D) AIPO4(Ksp = 1 × 10–20)
|
Answer: (D)
|
15.
|
A solution of two liquids boils at a
temperature more than the boiling point of either of them. Hence, the binary
solution shows
(A) positive deviation from Raoult's law
(B) negative deviation from Raoult's law
(C) positive or negative deviation from
Raoult's law depending upon the composition
(D) no
deviation from Raoult's law
|
Answer: (B)
|
AIEEE Chemistry Practice Questions
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