Câu 1: Nếu bị ong đốt, nên bôi vào vết ong đốt loại chất nào tốt nhất?

hoa11

Quiz
•
Others
•
11th Grade
•
Hard
Du Khanh
FREE Resource
12 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
giấm
xà phòng
kem đánh răng
vôi
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 2: Một số carboxylic acid như oxalic acid, tartaric acid,… gây ra vị chua của quả sấu xanh. Trong quá trình làm món sấu ngâm đường, người ra sử dụng dung dịch nào để làm giảm độ chua của sấu?
nước vôi trong
dấm ăn
muối
nước
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 3: Formaldehyde có ứng dụng nào?
sản xuất acetic acid
Sản xuất chloroform.
bảo quản mẫu sinh vật
sản xuất bisphenol – A.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Name a strong acid commonly used in laboratories.
Acetic acid
Hydrochloric acid
Ammonium chloride
Sodium hydroxide
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the general formula for alkanes?
CnH(2n+2)
C2nHn
CnH(2n-2)
CnH2n
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary characteristic of a base?
Ability to accept protons or donate electron pairs.
Ability to change color in acidic solutions.
Ability to conduct electricity in water.
Ability to donate protons or accept electron pairs.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which group in the periodic table contains noble gases?
Group 17
Group 14
Group 18
Group 1
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