课程名称︰普通化学丙
课程性质︰
课程教师︰佘瑞琳
开课学院：
开课系所︰
考试日期（年月日）︰2015/03/20
考试时限（分钟）：120 min 10:20am - 12:20pm
试题 :
General Chemistry Midterm Exam 2015/03/20
Gas constant: R 8.314 J/mol.K = 0.082 L.atm/mol.K; 1L.atm = 101.3J
H = 1.01; C = 12.01; N = 14.01; O = 16.00; S = 32.07; Cl = 32.45; I = 126.9;
Na = 22.99; Pb = 207.2
I. Multiple choices questions (30%, 2 points per question, each may have 1-4
correct answers)
1. For the following measures, which one shows three significant figures?
(a)5.80g (b)0.058g (c)5.8*10^2g (d)508g
2. Which of the following calculations show three significant figures in the
answer?
(a)555+777 (b)876-26 (c)123*2.5 (d)(767-27)*285.2 / 0.110*273.15
3. Which of the following is the intensive property?
(a)concentration (b)temperature (c) density (d)volume
4. Choose the correct conversion in the followings:
(a)1.5*10^-9 m = 15nm (b)35mg = 0.35g(c)212F = 100C (温度) (d)5uL = 5*10^-6L
55
5. For the ion Mn2+ , which of the following sataement is correct?
25
(a)the atomic number is 25 (b)the mass number is 55
(c)the number of electrons is 25 (d)the number of protons is 30
6. Which of the following is alkaline earth metal?
(a)Na (b)Ca (c)Co (d)La
7. Solubility rules prdict precipitate formation for mixing 0.1M aqueous
solutions of
(a)H2SO4 and Pb(NO3)2 (b)HCl and Ca(NO3)2
(c)H2S and AgNO3 (d)Na2CO3 and Ba(NO3)2
8. Which of the following is weak electrolyte?
(a)HI (b)HF (c)CH3NH2 (d)HNO2
9. Which of the following underlined (我用中括号刮起来) atoms show the
highest oxidation number?
(a)K[Mn]O4 (b)H2[S]O3 (c)H2[O] (d)[C]O2
10. Consider the reaction: 2NaI(s) + SO42-(aq)