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(2018)NationalityNo.

CHEMISTRY(Please print full name, underlining family name)

Marks

Name

If necessary, use the following data to answer the questions below.
Atomic Weight: H = 1.0, C = 12.0, N = 14.0, O = 16.0, S = 32.0, Cu = 64.0
Molar volume of gas at the standard state: 22.4 L / molGas constant: = 0.082 atm L / ( K mol ) = 8.31×103 Pa L / ( K mol )Avogadro constant: A = 6.02×1023 / molPressure: 1 atm = 1.01×105 Pa = 760 mmHg
Faraday constant: = 9.65×104 C / molChoose the correct answer from the choices

tobelow. Select the closest one,when your calculated result does not exactly match any of the values of thealternatives in each group.

Q1

Which of the following elements is not the noble gas ?
NeQ2

ArBr

KrXe

Which of the following elements has the smallest electronegativity ?
KClZn

LiO

Q3

Which of the following atoms has the most valence electrons ?
NQ4

Q5NaSiF

Which of the following molecules has the most lone pair electrons ?
CH3OH

C2H4

CO2HClNH3

Which of the following oxides is an amphoteric oxide ?
NO2Q6

S

CO2Na2OCaO

ZnOWhich of the following compounds has the maximum mass percentage ofcarbon in the compound ?
CH3CHOC2H5OH

CH3OH

CH3COOH

CH3OCH3

Q7

The volume percentage of hydrogen, H2, gas is 30 % in a mixture of hydrogengas and methane, CH4, gas at the standard state. Answer the following
questions.
(A) Calculate the density of the mixed gas.
0.28 g / L

0.53 g / L

5.3 g / L

28 g / L

2.8 g / L(B) Calculate the heat evolved in a complete combustion of 10.0 L of the mixed
gas at the standard state. The heats of combustion of hydrogen andmethane are 286 and 891 kJ / mol, respectively.

Q8103 kJ

209 kJ

421 kJ

533 kJ

317 kJ

The density of 17.0 % sulfuric acid, H2SO4, is 1.12 g / mL. Calculate the molar
concentration of the sulfuric acid.
0.9 mol / L

1.9 mol / L

3.9 mol / L

4.9 mol / L

2.9 mol / L

Q9The solubilities of copper (II) sulfate, CuSO4, in water are 20 [g / 100 g H2O]
at 293 K, and 54 [g / 100 g H2O] at 353 K. How many grams of copper (II)sulfate pentahydrate, CuSO4 5H2O, will crystallize out of 200 g of a solution
saturated at 353 K if it cools to 293 K ?

32 g

Q1041 g

55 g

64 g

77 g

Calculate the degree of ionization,, of ïòð I ïðmol / L acetic acid,

CH3COOH. The ionization constant,a, of acetic acid isîòé I ïðmol / L.

Use the following value, if necessary.
í ã ïòéí

Q110.0170.026

0.043

0.052

0.035

The mass of oxygen, O2, gas occupied a volume of 550 mL is 0.96 g at 330 K.
Calculate the pressure of the oxygen gas.
0.35 105 Pa

0.75 105 Pa

2.5

4.0105 Pa105 Pa

1.5105 PaQ12In the following reaction, which of the following procedures is correct for thedisplacement of the equilibrium in the right direction ?

Ò õ íØîÒØ õ çî µÖ

Raising the temperature
Decreasing the pressure
Reducing the amount of NH3
Reducing the amount of N2
Reducing the amount of H2
Q13

A certain amount of oxalic acid, (COOH)2, reacted with 200 mL of 0.020
mol/L potassium permanganate, KMnO4, to oxidize completely. Calculate
the mass of the oxalic acid.
0.36 g

Q14

Q150.90 g

1.1 g

1.4 g

1.8 g

When electrolysis of a sulfuric acid, H2SO4, was carried out at 2.0 A for 25
min using a platinum, Pt, electrode, oxygen, O2, gas was liberated. Calculate
the volume of the oxygen gas at the standard state.
0.14 L0.17 L0.51 L0.68 L0.34 L

Which of the following gases is the colored gas ?
NO2SO2

CO2

H2S

NH3

Q16

Q17Which of the following metal complex ion solutions is the colored solution ?
[Cu(NH3)4] 2+[Zn(NH3)4] 2+[Zn(OH)4] 2[Al(OH)4]

How many isomers are there for the compound with molecular formulaC2H4O ?
1Q18

[Ag(NH3)2] +2345

Which of the following molecules has a positive reaction in the Fehling’ssolution test ?

Q19

AcetoneDimethyl ether

Acetaldehyde

Acetic acid

Ethanol

Which of the following molecules does not react with ethylene CH2=CH2 ?
Cl2Br2H2N2HCl