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Phonetics: Choose the word whose underlined part is pronounced differently:
1. A. tooth B. clothing C. bath D. both
2. A. gather B. monthly C. father D. brother
3. A. though B. thank C. through D. thin
4. A. clip B. give C. twice D. stupid
5. A. studio B. documentary C. cute D. stupid
a)\(Fe+CuSO4-->Cu+FeSO4\)
b) \(n_{Fe}=\frac{1,96}{56}=0,035\left(mol\right)\)
\(m_{CuSO4}=\frac{100.10}{100}=10\left(g\right)\)
\(n_{CuSO4}=\frac{10}{160}=0,0625\left(mol\right)\)
Do \(0,036>0,0625\Leftrightarrow\) \(n_{Fe}< n_{CuSO4}\)
=> CuSO4 dư.Tính theo n chất hết (Fe)
Chất rắn B là Cu
\(n_{Cu}=n_{Fe}=0,035\left(mol\right)\)
\(m_{Cu}=0,035.64=2,24\left(g\right)\)
c) m dd A =\(m_{Fe}+m_{ddCuSO4}-m_{Cu}=1,96+100-2,24=99,72\left(g\right)\)
dd A là FeSO4 và CuSO4 dư
\(n_{FeSO4}=n_{Fe}=0,035\left(mol\right)\)
\(m_{FeSO4}=0,035.152=5,32\left(g\right)\)
\(C\%_{FeSO4}=\frac{5,32}{99,72}.100\%=5,33\%\)
\(n_{CuSO4}=n_{Fe}=0,035\left(mol\right)\)
\(n_{CuSO4}dư=0,0625-0,035=0,0275\left(mol\right)\)
\(m_{CuSO4}dư=0,0275.160=4,4\left(g\right)\)
\(C\%_{CuSO4}dư=\frac{4,4}{99,72}.100\%=4,41\%\)
1 A. leather B. that C. theatre D. then
2 A. nothing B. gather C. method D. death
3 A. something B. brother C. them D. weather
4 A. those B. there C. thank D. without
5 A. soothe B. south C. thick D. athlete
6 A. healthy B. northern C. thirsty D. mouth
7 A. this B. these C. them D. earth
8 A. this B. feather C. smooth D. south
9 A. think B. month C. everything D. clothing
II. Choose the word whose underlined part is pronounced differently from the others . 1.A.bicycle B. exciting C. favorite D. widely
2.A. doctor B. opening C. gold D. poscard
3. A. farther B. earth C. both D. marathon
4.A. fear B. repeat C. idea D. really
5.A.hair B. fare C. prepare D. speaker
III. Choose the word whose underlined part is pronounced differently from the others. 1. A. arrived B. watched C. listened D. played
2. A. arrived B. watched C. stopped D. washed
3.A. they B. month C. father D. brother
4.A. ago B. open C. cold D. come
5. A. married B. called C. played D. rented
6. A. started B. worked C. waited D. wanted
IV. Choose the word whose underlined part is pronounced differently from the others 1. A. needed B. liked C. washed D. hoped
2. A. works B. plays C. wants D. stops
3. A. stayed B. listened C. cooked D. played
4.A. brother B. open C. some D. come
5. A. wanted B. excited C. needed D. bored
Find the word which has a different sound in the part underlined.
1. A. writes B makes C. takes D. drives
2. A never B often C. when D. tennis
3. A. eating B. reading C. teacher D. breakfast
4. A. Thursday B. thanks C. these D. birthday
5. A. open B doing C going D. cold
6. A. tooth B. clothing C. bath D. both
7. A. gather B. monthly C. father D. brother
8. A. though B. thank C. through D. thin
9. A. clip B. give C. twice D. stupid
10. A. think B. month C. everything D. clothing
Chọn mỗi từ phát âm khác của mỗi nhóm
1. A. Bed. B. Setting. C. Decide. D. Get
2. A. Easy. B. Eat. C. Learn. D. Tea
3. A. Sit. B. In. C. If. D. Fine
4. A. Child. B. Watch. C. Chin. D. School
5. A. Come. B. No. C. Open. D. Home
6. A. Theater. B. There. C. Through. D. Three
7. A. Brother. B.Breath. C. Either. D. Clothes
8. A. Clip. B. Give. C. Twice. D. Stupid
9. A. Favorite. B.Animal. C. Channel. D. Programme
10. A. Studio. B. Documentary. C. Cute. D. Industry
11. A. When. B. Where. C. Best. D. Decective
12. A. Weather. B. Newsreader. C. Teaching. D. Repeat
13. A. Clumsy. B. Cute. C. But. D. Just
14. A. Earth. B. Thanks. C. Feather. D. Theater
15. A. The. B. Think. C. With. D. They
16. A. Something. B. Theatre. C. Neither. D. Monthly
17. A. Other. B. Thinking. C. Healthy D. Birthday
18. A. Thailand. B. Weatherman. C. Anything. D. Thanksgiving
19. A. Earth. B. Through. C. Both. D. There
20. A. Growth. B. Three. C. Feather. D. Thing
21. A. This. B. Think. C. Thank. D. Thieves
22. A. Gather. B. Bathe. C. Birthday. D. Weather
23. A. Tooth. B. Breathe. C. Through. D. Earth
24. A. Thirty. B. Than. C. Therefore. D. Those
25. A. Mouth. B.Thursday C. Nothing. D. Worthy
26. A. Both. B. Teeth. C. Smooth. D. Fourth
27. A. Weather. B.Wealthy. C. Clothing. D. Bathing
28. A. Though. B. Thank. C. Throw. D. Thin
29. A. Southern. B. Neither. C. Thus. D. Third
30. A. Author. B. Those. C. Width. D. Think
31. A. Thin. B. Than. C. They. D. There
32. A. Birthday. B. Earth. C. Worth. D. There
33.another. B. Death. C. Brother. D. Though
1D
2C
3C
4C
5B
6A
7A
8D
9A
10B
11D
12C
13D
14B
15A
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