
Ôn tập hoá giữa kì I
Authored by Phước Thiện
Science
12th Grade
Used 1+ times

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56 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ester no, đơn chức, mạch hở có công thức tổng quát là
CnH2nO (n≥2).
CnH2n+2O2 (n≥2)
CnH2n-2O2 (n≥2)
CnH2nO2 (n≥2)
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Methyl acetate có công thức cấu tạo là
CH3COOC2H5
HCOOC2H5
CH3COOCH3
HCOOCH3
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ester vinyl acetate có công thức là
CH3COOCH=CH2
HCOOCH3
CH3COOCH3
CH2=CHCOOCH3
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho các chất sau: CH3COOCH3, HCOOCH3, HCOOC6H5, CH3COOC2H5. Chất có nhiệt độ sôi thấp nhất là
HCOOC6H5
CH3COOC2H5
HCOOCH3
CH3COOCH3
Answer explanation
khối lượng càng thấp thì nhiệt độ sôi càng thấp
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chất béo là triester của acid béo với
ethylene glycol
glycerol
ethanol
phenol
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Công thức nào sau đây có thể là công thức của chất béo?
. (CH3COO)3C3H5
(C17H33COO)3C3H5
(C17H35COO)2C2H4
(C2H3COO)3C3H5
Answer explanation
Công thức chung:
👉 (C17H35COO)3C3H5
Công thức chung:
👉 (C17H35COO)3C3H5
Hoặc tổng quát hơn:
(RCOO)3C3H5
với R là gốc hiđrocacbon no hoặc không no (ví dụ: C₁₅H₃₁, C₁₇H₃₃, C₁₇H₃₅...).
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Tên gọi của chất béo có công thức (CH3[CH2]14COO)3C3H5 là
triolein
tristearin
tripanmitin
trilinolein
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