Download - AMU - Chemistry - 2004
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CHEMISTRY- UNSOLVED PAPER - 2004
SECTION – I
Single Correct Answer Type There are five parts in this question. Four choices are given for each part and one of them is
correct. Indicate you choice of the correct answer for each part in your answer-book by
writing the letter (a), (b), (c) or (d) whichever is appropriate
01The mass of a photon with wavelength 3.6 Å is :
a. 6.135 x 10-29 kg
b. 3.60 x 10-29 kg
c. 6.135 x 10-33 kg
d. 3.60 x 10-27 kg
Problem
02An electron with values 4, 2, -2 and +1/2 for the set of four quantum numbers n,
l, m1 and s respectively, belongs to :
a. 4s orbital
b. 4p orbital
c. 4d orbital
d. 4f orbital
Problem
Problem03The bond order of varies in the order :
a.
b.
c.
d.
22 2 2 2, ,O O O andO
22 2 2 2O O O O
22 2 2 2O O O O
22 2 2 2O O O O
22 2 2 2O O O O
Problem04Molecular orbital electronic configuration for ‘X’ anion is :
. The anion ‘X’ is :
a.
b.
c.
d.
2 * 2 2 2 2 1* ( 2 ) ( 2 ) ( 2 ) ( 2 ) ( 2 ) ( * 2 )x y z xKK s s p p p p
2N
2O
22N
22O
Problem05Which of the following statements is incorrect ?
a. Pure aluminium oxide is obtained by heating aluminium hydroxide.
b. Cryolite lowers down the melting temperature of bauxite in the electrolytic
cell for extraction of aluminium.
c. Carbonate ores are converted into oxides by roasting ore in air.
d. Mercury cannot be produced by roasting the ore cinnabar in air.
Problem06The relative Lewis acid character of boron trihalides is in the order :
a. BI3 > BBr3 > BF3 > BCl3
b. BI3 > BBr3 > BCl3 > BF3
c. BF3 > BCl3 > BBr3 > Bl3
d. BCl3 > BF3 > BI3 > BBr3
Problem07Which of the following metals is most reactive towards water ?
a. Na
b. K
c. Rb
d. Cs
Problem08Which of the following molecules has pentagonal bipyramidal shape :
a. PF5
b. SF6l
c. XeF6
d. [Fe(CN)6]3-
Problem09The acidity of hydrides of O, S, Se, Te varies in the order :
a. H2O > H2S > H2Se > H2Te
b. H2O > H2S < H2Se < H2Te
c. H2S > H2O > H2Se > H2Te
d. H2Se > H2S > H2O > H2Te
Problem10The stability of complexes of Cu2+, Ni2+, Co2+ and Fe2+ varies in the order :
a. Cu2+ > Ni2+ > Co2+ > Fe2+
b. Cu2+ > Fe2+ > Ni2+ > Co2+
c. Ni2+ > Co2+ > Fe2+ > Cu2+
d. Cu2+ < Ni2+ < Co2+ < Fe2+
Problem11Which of the following compounds is generally used for hydrogenation of
alkenes ?
a. Ni(CO)4
b. [(C6H5)3P]3RhCl
c. (CH3)3Al
d. (C5H5)2Fe
Problem12The example of co-ordination isomerism is :
a. [Co(NH3)6][Cr(CN)6] and [Cr(NH3)6][Co(CN)6]
b. [Co(NH3)5Br]SO4 and [Co(NH3)5SO4]Br
c. [Co(NH3)5NO3]SO4 and [Co(NH3)5SO4]NO3
d. [Pt(NH3)4Cl2]Br2 and [Pt(NH3)4Br2]Cl2
Problem13Cow milk is an example of natural emulsion stabilized by :
a. Detergent
b. Fat
c. Casein
d. Urea
Problem14The molal elevation constant for water is 0-.52. What will be the boiling point of 2
molar sucrose solution at 1 atm. Pressure ? (Assume B.P. of pure water as 1000C) :
a. 101.040 C
b. 100.260 C
c. 100.520 C
d. 99.740 C
Problem15If at 250 C the ionization constant of acetic acid is 2 x 10-5, the hydrolysis
constant of sodium acetate will be :
a. 5 x 10-8
b. 5 x 10-9
c. 5 x 10-10
d. 4 x 10-10
Problem16The solubility product of Ag2CrO4 in water at 2908 K is 3.2 x 10-11. What will be
the concentration of CrO ions in the saturated solution of Ag2CrO4 ?
a. 2 x 10-4 m
b. 5.7 x 10-5 M
c. 5.7 x 10-6 M
d. 3.2 x 10-11
Problem17The pKb value of NH3 is 5. Calculate the pH of buffer solution, 1 L of which
contains 0.01 NH4Cl and 0.10 M NH4OH :
a. 4
b. 6
c. 8
d. 10
Problem18Calculate the entropy change for CH4(g) + H2O(g) 3H2(g) + CO(g), using the
following data :
The entropy change is :
a. - 46 JK-1mole-1
b. + 46 JK-1mole-1
c. - 214.5 JK-1mole-1
d. + 214.5 JK-1mole-1
Substance CH4(g) H2O(g) H2(g) CO(g)
So/JK-1 mole-1 186.2 188.7 130.6 197.6
Problem19The type of hybridization in XeF4 is :
a. dsp2
b. sp3d
c. sp3d2
d. sp3d3
Problem20given the electrode potentials
Fe3+ + e- Fe2+, Eo = 0.771 volts
I2 + 2e- 2I-,Eo = 0.536 volts
for the cell reaction
2Fe3+ 2I- 2Fe2+ + I2, is :
a. 1.006 V
b. 0.503 V
c. 0.235 V
d. - 0.235 V
0cellE
Problem21In the general nuclear reaction the product ‘D’ is :
a. -particle
b. -particle
c. -particle
d. proton
4 32 1 ' 'A A
Z ZX He Y D
Problem22Lassaigne’s test is not used for the detection of :
a. Carbon
b. Halogens
c. Nitrogen
d. Sculpture
Problem23Then number of isomeric alkenes with molecular formula C6H12 are :
a. 8
b. 10
c. 11
d. 13
Problem24Which of the following alkenes will yield 2-butaneone on ozonolysis followed by
the reaction with Zn/H2O ?
a. 2-Methyl-2-hexene
b. 2-Methyl-1-hexene
c. 3,4-Dimethyl1-e-hexene
d. 2, 3-Dimethyl-3-hexene
Problem25A bromoalkane ‘X’ reacts with magnesium in dry ether to from compound ‘Y’.
the reaction of ‘Y’ with methanal followed by hydrolysis yield an alcohol
having molecular formula C4H10O. The compound ‘X’ is :
a. Bromo ethane
b. Bromo methane
c. 1-bromo propane
d. 2-bromo propane
Problem26Which of the following compounds will not exhibit cis-trans isomerism ?
a.
b.
c.
d.
Problem27Which of the following molecule is achiral ?
a.
b.
c.
d.
Problem28Which of the following compounds will be most reactive towards nucleophilic
additon reaction ?
a. CH3COCH2CH2CH2CH3
b. CH3CH2COCH2CH2CH3
c. CH3CH2CH2CH2CH2CHO
d.
Problem29Which of the following compounds is the strongest acid ?
a. HCOOH
b. CH3COOH
c. Cl2CHCOOH
d. C6H5COOH
Problem30In the reaction sequence the product ‘C’ is :
a. Benzonitrile
b. Benzaldehyde
c. Benzoic
d. Benzlyamine
Problem31The basicity of compounds I, II, III and IV
CH3NH2, (CH3)2NH, (CH3)3N, C6H5CH2NH2
I II II IV
Varies in the order :
a. I > II > III > IV
b. II > I > III > IV
c. III > I > II > IV
d. IV > I > II > III
Problem32Diethyl oxalate is used for distinguishing primary, secondary and tertiary :
a. Alcohols
b. Amines
c. Alkyl halides
d. Hydrogens in hydrocarbons
Problem33The brown haze of photochemical smong is largely attributable to :
a. NO
b. NO2
c.
d. CH2 = CHCH = O
Problem34The water pollutants mainly responsible for eutrophication are :
a. Cd, Pb and Hg present in industrial waste
b. Heavy metals present in mining waste
c. Detergents and fertilizes containing phosphate anion
d. Polychlorinated biphenyls
Problem35Which of the following is a thermosetting polymer ?
a. Polyethene
b. Bakelite
c. Terylene
d. Polystyrene
Problem36Which of the following is an example of conjugated protein ?
a. Albumin
b. Globulin
c. Glutelin
d. Glycoprotein
Problem37If one strand of DNA has the sequence ATCGTATG, the sequence in the
complementary strand would be :
a. TAGCTTAC
b. TCACATAC
c. TAGCATAC
d. TACGATAC
Problem38Fluorescein in an example of :
a. Azo dyes
b. Phthalein dyes
c. Triphenyl methane dyes
d. Nitro dyes
Problem39Amphetamine is used as:
a. Anaesthetic
b. Antidepressant
c. Antimalarial
d. Anagesic
Problem40Which of the following compounds is used as broad spectrum antibiotics ?
a. Ampicillin
b. Penicillin G
c. Penicillin K
d. Tetracyline
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