Analytical Chemistry
1-
The
uv-visible radiation region is between
a- 200-800
A b- 200-800 nm c- 400-800 A d-400-800 nm
2-
If
the fraction mole of metal is (0.66) the formula of complex is
a- ML b- ML2 c- M2L d-M2L3
3-
A
molar concentrated of aqueous ammonia that is 28.0% w/w NH3 and has
a density of 0.899 g/ml is
a- 14.8 b- 14.6 c- 14.2 d- 14.1
4-
The
pNa+ for solution results from mixing 10 ml of 1x10-3 M
Na3PO4 and 10 ml of 1x10-3 M NaCl is
a- 3 b- 2.397 c- 2.522 d- 2.698
5-
A
1.25 g of alloy was dissolved in acid and diluted to volume in a 250 ml
volumetric flask. A 20 ml portion of the resulting solution was transferred by
pipet to a 50 ml volumetric flask and diluted to volume. An analysis showed
that the concentration of Cu2+ in final solution was 4.62 ppm. the
weight percentage of Cu in the original alloy is
a- 0.115 b- 0.231 c- 0.345 d- 0.46
6-
The
electrode potential of the half-cell
[ Bi|BiO+ (1x10-3 M), H+( 1x10-2M).] E0= 0.32 v is
a- 0.113
v b- 0.182 v c- 0.216 v d- 0.32 v
7-
The
number of moles of MnO4- needed to balancing the reaction
of MnO4- with H2O2 to form Mn2+
, O2 and H2O is
a- 4 b- 3 c- 2 d- 1
8-
If
the tm of mobile phase is 0.15 min and the tR of compound
is 3.23 min. the capacity factor is
a- 0.484 b- 3.08 c- 20.53 d- 21.53
9-
On
the a particular 25 cm long column. Benzene had a retention time of 33 min and
a peak width of 15.1 min .the height equivalent of a theoretical plate is.
a- 0.027 b- 0.127 c- 0.227 d- 0.327
10- The pH of
0.1M NH4Cl solution is (KbNH4OH= 1x10-5)
a-
5 b- 7 c-8 d- 10
Physical chemistry
11- Newton’s second law of motion is ..............
a - F = -kx
b - -kx = mx•
c - -kx = m
d- None of them
12-
The equation ʌ̑f = λf is the Eigen function where λ is..............
a- Eigen value
b- linear operator
c- complex value
d- not Eigen value
13- Heisenberg`s uncertainty principle states that both the
and ............. of
a particle can`t be determined with
finite accuracy and instantaneously.
a - momentum
b - mass
c - energy
d – time
14- The Hamiltonian operator is
the.............. factor.
a - moment
b - time
c - energy
d – potential energy
15- For the reaction 2A + 3B →
4C + 5D, the reaction rate could be expressed in terms of ΔA as..............
a - -ΔA/Δt.
b - -0.5 ΔA/Δt.
c - +ΔA/Δt.
d - +0.5 ΔA/Δt.
16- The energy needed for a reaction to
proceed from reactants to products is called is..............
a - collision energy
b - Kinetic energy
c - activation energy
d - potential energy
17- In a voltaic cell, electrons flow from the ..............to
the...............
a - Salt bride, anode
b - Anode, cathode
c - Anode, salt bridge
d - Salt bridge, cathode
18- For a spontaneous process at constant temperature and
pressure, there must be a............. of the Gibbs free energy, (ΔG)P, T.
a - lowering
b - increasing
c – matching to zero
d – None of them
19- A vapour must be more disordered and so have higher
entropy than a liquid, so the entropy of vaporization is..............
a – negative b- positive c- zero d- equal to heat change
20- mThe correct relationship between free energy change of a reaction and
the corresponding equilibrium constant K is..............
a - -△G = RT
lnK
b - △G0 = RT lnK
c - -△G0 = RT lnK
d - △G = RT lnK
26- Which of the following complexes shows zero
crystal field stabilization energy?
a- [Co(H2O)6]3+
b- [Fe(H2O)6]3+
c- [Co(H2O)6]2+
d- [Mn(H2O)6]3+
27- How
many unpaired electrons are present in [CoF6]3- complex?
a- 4
b- zero
c- 2
d- 3
28- Which of the following d orbitals take
part in the octahedral complex with d2sp3 hybridisation?
a- dxy, dyz
b- dxz, dx2−y2
c- dx2−y2, dz2
d- dz2, dxz
29- Find the molecule having the highest bond
order
a- O2+
b- O2–
c- O22-
d- O2
30- Which of the following is true for the
formation of stable bonds according to valence bond theory?
a- Greater overlapping between atomic orbitals
b- Close proximity between two atoms
c- Pairing of electrons having opposite spins
d- All of the above
Organic
chemistry
31- Which of the
following does not come under the organic addition reaction
a- Halogenation
b- Hydrohalogenation
c-
Hydration
d -Dehydration
32- Which of the following organic compound
with molecular formula C3H6 Cl2 exhibits only one signal in the IH NMR spectrum
a- 1, 2-dichloropropane
b- 1, 1-dichloropropane
c- 2, 2-dichloropropane
d- 1, 3-dichloropropane
33-Which of the following organic compound is
formed when aniline reacts with acetaldehyde?
a- Diazonium salt
b- Immine
c- Schiff’s base
d- Carbylamine
34- Which of the
following will be the product ‘a’ in the given reation
a-
Chlorobenzene
b-
Benzene
c-
Benzene diazonium chloride
d- Enolate form
35- The IUPAC name for (CH3)2CHCH(CH3)CH2CH=CH2
is
a- 4,5-dimethyl-1-hexene
b-
4,5,5-trimethyl-1-pentene
c-
2,3-dimethyl-5-hexene
d-
4-methyl-4-isopropyl-1-butene
36- Which of the
following is the simplest member of organic compounds?
a-Formic acid
b- Formaldehyde
c- Methane
d- Methanol
37- Which of the following is a classification
of Organic compounds?
a- alicyclic compounds and acyclic compounds
b- Cyclic compounds and alicyclic compounds
c- Open chain compounds and acyclic compounds
d- Open chain compounds and linear chain
compounds
38- Which of the following is yielded when Ethylene glycol is
treated with phosphorus tri-iodide?
a- ethylene di-iodide
b- ethylene
c- ethane
d- ethyl iodide
39-Hydrocarbons are
organic compounds with element __________
a- Both hydrogen and carbon
b- Carbon
c- Hydrogen
d- Oxygen
40-Which
of the following bond is made up of a large number of organic compounds?
a- Metallic bond
b- Dipolar bond
c- Ionic bond
d- Covalent bond
Biochemistry
41- Deterioration of food (rancidity ) is due to presence of :
a- Cholesterol
b- Vitamin E
c- Peroxidation of lipids
d- Phenolic compounds
42- Molecular formula of cholesterol is
a- C27H45OH
b- C29H47OH
c- C29H47OH2
d- C23H41OH
43- Free fatty acids are transported in the blood
a- Combined with albumin
b- Combined with fatty acid binding protein
c- Combined with β- lipoprotein
d- In unbound free salts
44-Arabinose monosaccharide from
a- Aldopentoses. b- Ketopentoses. c- Aldohexoses d- ketohexoses
45-The Uronic acids are
a- Sugar derivatives produced by oxidation of carbonyl group to carboxylic group.
b- Sugar derivatives produced by oxidation of last hydroxyl group to carboxylic group.
c- Sugar derivatives produced by oxidation of carbonyl and last hydroxyl groups to carboxylic groups.
d- Sugar derivatives produced by reduction of carbonyl group to carboxylic group.
46- Branching enzyme one from
a- enzymes of Glycogenesis pathway.
b- enzymes of Gluconeogenesis pathway.
c- enzymes of Glycogenolysis pathway.
d- enzymes of Glycolysis pathway.
47-How many steps of urea cycle occur in liver mitochondria and cytosol?
a-3 steps in mitochondria and 3steps in cytosol.
b-3 steps in mitochondria and 2steps in cytosol.
c-2 steps in mitochondria and 3steps in cytosol.
d-3 steps in mitochondria and 2steps in cytosol.
48-We are incapable of synthesizing some of the standard amino acids.
a- 10 amino acids. b- 5 amino acids c- 20 amino acids d- 7 amino acids
49-DNA contain nitrogenous bases are
a-Adenine,Guanine,Cytosine and Uracil.
b-Adenine,Guanine,Thymine and Cytosine.
c-Uracil, Guanine,Thymine and Cytosine.
d-Cytosine,Uracil, Thymine and Adenine.
50-Which is RNA contain the anticodon arm?
a-mRNA.
b-tRNA.
c-rRNA.
d- mRNA and rRNA.
التاريخ: 21-01-2024 | الوقـت: 07:52:16 مساءا |
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