(2016)
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CHEMISTRY

Marks(Please print full name, underlining family name)Name

If necessary, use the following data to answer the questions below.
Atomic Weight: H = 1.0, C = 12.0, O = 16.0, Na = 23.0, Cu = 63.6
Molar volume of gas at the standard state: 22.4 L / molGas constant: R = 0.082 ( atm･L ) / ( K･mol ) = 8.31×103 ( Pa･L ) / ( K･mol )Avogadro constant: NA = 6.02×1023 / mol
Pressure: 1 atm = 1.01×105 Pa = 760 mmHg
Faraday’s constant: F = 9.65×104 C / molChoose the correct answer from the choices ① to ⑤ below. Select the closest one,when your calculated result does not match exactly any of the values of thealternatives in each group.

Q1 Answer each question about B, C, N, O, and F elements.
①B

② C

③ N

④ O

⑤ F

(A) Which is the element with the largest atomic radius ?

(B) Which is the element which becomes an anion of bivalence easily ?

(C) Which is the element with the largest electronegativity ?

Q2 Which is the polar molecule among the following molecules?
① H2② Cl2③ CO2④ H 2O⑤ CH4

Q3 Answer the following questions about the oxygen ion shown below.

(A) How many neutrons are there in this ion?
① 5② 6③ 7④ 8⑤ 9(B) Which has the electron configuration different from the one of this oxideion?
① F－

② Ne

③ Al3+④ Mg2+⑤ Cl－

Q4 Which has the largest oxidation number in the underlined atoms below?
① Al2O3② MnO2③ HClO4④ K2Cr2O7⑤ N2 O 5Q5Answer the following questions about the thermochemical equation ofcombustion of propane C3H8 (g).

(A) What is the coefficient a of the following thermochemical equation?
C3H8 (g)+①2② 3

a O2 (g) = b CO2 (g) + c H2O (ｌ) +③ 5④ 82219 kJ⑤ 10(B) Calculate the quantity of heat (kJ) when the propane of 2.24 L is burned atstandard state.
① 113

Q6

② 222

③ 339

④ 666

⑤ 2220What is the obtained compound by the thermal decomposition of the
1-2-dichloroethane CH2ClCH2Cl ?
① CH2=CH2⑤ CH2=CHCl② CH≡CH③ CCl≡CCl④ CHCl=CHCl

Q7 A Solution of 250 mL was prepared by adding water to sodium hydroxide
NaOH 2.0 g. Answer the following questions.
(A) Calculate the molar concentration (mol / L) of this solution.
① 0.1

② 0.2

③ 0.3

④ 0.4

⑤ 0.5(B) Calculate the pH of this solution. Use the following value, if necessary.
log10 2 = 0.30, log10 5 = 0.70
① 0.3

② 7.3

③ 11.3④ 13.3⑤14.3(C) Calculate the volume (mL) of HCl solution of 0.5 mol/L to neutralize 50mLof this solution.
① 10② 15

③ 20

④ 25

⑤ 30

Q8 There is oxygen gas which occupies the volume of 820 mL at 300 K and 1.5
atm. Answer the following questions.
(A) Calculate the amount of substance (mol) of this oxygen gas.
① 0.005② 0.05

③ 0.5

④ 5.0

⑤ 50(B) Calculate the pressure (atm) when this gas is set to 600 K and 1640 mL.
① 0.1

② 0.5

③ 1.0

④ 1.5

⑤ 2.0

Q9 Answer each question about the following compound.
CH3COOH(A) What is the name of the underlined functional group?
① hydroxy group② carbonyl group④ amino group⑤ sulfo group③carboxyl group(B) What is the property of the water solution of 1 mol / L of this compound?
① strong acid

② weak acid ③ neutral ④ weak base ⑤ strong base

Q10

Electrolysis was carried out for copper sulfate (CuSO4) solution for 25
minutes 44 seconds with the current of 2.5 A using the platinum electrode.
Answer the following questions.

(A) Calculate the mass (g) of the metal to be deposited on the cathode.
① 0.16② 0.32③ 0.64④ 1.27⑤ 2.54(B) At the standard state, calculate the volume(L) of gas generated at theanode.
① 0.08② 0.11③ 0.22④ 0.32⑤ 0.45Q11 Mixture of 4.0 mol acetic acid CH3COOH and 2.0 mol ethanol C2H5OH
was made to react at constant temperature. Calculate the amount of substance(mol) of the ethyl acetate CH3COOC2H5 generated at the equilibrium situation.
The equilibrium constant K is 4.0. Use the following value, if necessary.
= 13.86① 1.21② 1.69③ 2.13④ 3.86⑤ 6.31192