Set IV (One (1) Hour)
Read the question carefully for four (4) times. Choose the BEST answer only.
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1) Calculate ∆Ho
Fe2O3 (s) + CO (g) → 2FeO (s) + CO2 (g)
Given
Fe2O3 (s) + 3CO (g) → 2Fe (s) + 3CO2 (g) ∆Ho = -26.8 kJ
Fe (s) + CO2 (g) → FeO (s) + CO (g) ∆Ho = +16.5 kJ
A. +59.8 kJ B. + 6.2 kJ
C. -10.3 kJ D. -43.3 kJ
2) Fe3+ (aq) + 2e Fe2+ (aq) Eo = +0.77 V
O2 (g) + 2H+ + 2e H2O2 (ℓ) Eo = +0.68 V Fe2+ (aq) + 2e Fe (s) Eo = - 0.44 V Cr2+ (aq) + 2e Cr (s) Eo = - 1.91 V
Choose reaction that can occur spontaneously
A. Cr2+ (aq) + 2Fe2+ (aq) Cr (s) + 2Fe3+ (aq) B. Cr2+ (aq) + H2O2 (ℓ) Cr (s) + O2 (g) + 2H+ (aq) C. Cr2+ (aq) + Fe (s) Cr (s) + Fe2+ (aq)
D. Fe (s) + 2H+ (aq) + O2 (g) H2O2 (ℓ) + Fe2+ (aq)3) A cell with Eocell = +1.10 V. Choose the electrode pair based on half-cell
potential.
K2+ (aq) + 2e K (s) Eo = +0.30 V
L2+ (aq) + 2e L (s) Eo = - 0.30 V M+ (aq) + e M (s) Eo = - 0.80 V
N+ (aq) + e N (s) Eo = - 1.90 V - ve electrode + ve electrode
A. L M
B. N M
C. K M
D. M K
4) 
2MnO4- (aq) + 6H+ aq) + 5H2O2 (aq) 2Mn2+(aq) + 8HO2 (ℓ) + 5O2(g)
2MnO4- (aq) + 6H+ aq) + 5H2O2 (aq) 2Mn2+(aq) + 8HO2 (ℓ) + 5O2(g) The rate of water formation from the reaction is 0.035 M s-1.
What is the rate of formation of Mn2+ ?
A. 8.75 x 10-4 M s-1 B. 8.75 x 10-3 M s-1
C. 2.19 x 10-2 M s-1 D. 2.19 x 10-3 M s-1
5) C12H22O17 + H2O H+ 2C6H12O9 acidic hydrolysis of sucrose is 1st order reaction of 0.213 min-1. How long will
30% of 1 Kg sucrose react?
A. 749.1 s B. 238.7 s
C. 100.5 s D. 339.1 s
6) Most strong interaction formed between neutral molecules
A. dipole-dipole attraction B. covalent bonding
C. Hydrogen Bonding D. VDW’s Forces
7) Which compound has 1st and 2nd carbonA. B.
C. CH3CH2CH2CH2CH2CH3 D. CH3-CH2(CH3)- CH2CH2CH2CH3
8) Name the compound, C6H14 that formed 5 different product when react with Cℓ2
gas in UV
A. CH3-CH2(CH3)- CH2(CH3)-CH3 B. CH3CH2CH2CH2CH2CH3
C. (CH3)3C-CH2CH3 D. CH3-CH2(CH3)- CH2CH2CH3
9) Type of reaction for C=C
A. Electrophilic Addtition B. Nucleophilic Addtition
C. Nucleophilic Substitution D. Electrophilic Substitution
10) 
Predict M
A. B.
C. D. 11) 4-chloro-4-ethyl-2-methylhexane can be prepared from following compound
EXCEPT..
A. 3-ethyl-5-methyl-2-hexene B. 3-ethyl-5-methyl-3-hexene
C. 2-ethyl-4-methylpentene D. 4-ethyl-2-methyl-2-hexene
12) 1-Bromobutane + X Butene + Y Butan-1,2-diol
Butene + Y Butan-1,2-diol X Y
A. EtOH KMnO4, cold
B. H2SO4 KMnO4, cold
C. NaNH2 O3, ZnCl2
D. KOH, EtOH KMnO4, cold
13) Compound that can formed cloudy solution immediately with Lucas Test
A. hexene B. 2-methyl-2-butanol
C. formic acid D. cyclopentanol
14) Predict major product
A. B.
C. D. 15) H2O, H+ of compound Z give
A. COOH B. CH2CH2HN2
C. CH2COOH D. CH2CONH2
16) Predict N structure
LiAlH4 N
A. B.
C. D.
17) acetone + CH3-CH2 -MgX + Hydrolysis ?
?A. 2-methylbutanol B. 2-pentanol
C. 3-pentanol D. 2-methy-2-butanol
18) CH3-CH2(OH)CH3-CH2 _______ soluble in H2O than CH3CH2(CH3)CH2CH3
CH3-CH2(OH)CH3-CH2 _______ soluble in H2O than CH3CH2COOH
A. more, less B. more, more
C. less, more D. less, less
19) select the most acidic compound
A. Phenol B. cyclohexanylcarboxylic acid
C. Benzoic acid D. cyclohexanol
20) Select the suitable reagent to differentiate between these two structure
and
A. Br2 , H2O B. Tollen’s Reagent
C. PhSoCl2 / OH- followed hydrolysis D. Chromic acid
21) Which acid amino has an isoelectric near pH 10?
A. HO-Ph- CH2-CH(NH3+)COO- B. HOOC- CH2-CH2 CH(NH3+)COO-
C. CH3-CH(NH3+)COO- D. NH3+- CH2-CH2CH2-CH2-CH(NH3+)COO-
22) Which is polyamide
A. Proteins B. Dacron
C. natural rubber D. Plastic
For question 23-30 choose your answer from the option given
| A | B | C | D |
| I only | I and II only | II and III only | I, II, and III |
23) The reagent needed to convert Br-CH2=CH2CH2CH3 to Br-CH2CH2CH2CH3
I H2, Pt
II KOH, EtOH
III HCl conc, ZnCl2
24) Which substituent is meta director in aromatic electrophilic substitution reaction
I -CH3
II -C N III -COOH
25) compound that yield 2nd OH when react with CH3MgCl followed by acidification
I ethanal
II propanal
III 2-Butanone
26) In Condensation polymerization, two monomers react to form a larger molecule
and eliminate a smaller molecule such as
I H2O
II HCl
III CH3OH
27) This compound can form cis-trans isomers
I CH2CH= CH3
II ClCH= CHCl
III 28) Factor that effect the rate of reaction
I Concentration
II Temperature
III Pressure
29) Fe (s) | Fe2+ (aq) , Fe3+ (aq) || Ag+ (aq) | Ag (s)
The cell potential above can be increase by
I increase [Fe2+ ]
II increase [Fe3+ ]
III decrease [Ag+]
30) which species that ∆Hof = 0
I O2 (g)
II Br2 (ℓ)
III H2O (ℓ)
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