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Worksheetshoa11
Total questions: 12
Worksheet time: 6mins
Câu 1: Nếu bị ong đốt, nên bôi vào vết ong đốt loại chất nào tốt nhất?
giấm
xà phòng
kem đánh răng
vôi
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
Câu 3: Formaldehyde có ứng dụng nào?
sản xuất acetic acid
Sản xuất chloroform.
bảo quản mẫu sinh vật
sản xuất bisphenol – A.
Name a strong acid commonly used in laboratories.
Acetic acid
Hydrochloric acid
Ammonium chloride
Sodium hydroxide
What is the general formula for alkanes?
CnH(2n+2)
C2nHn
CnH(2n-2)
CnH2n
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.
Which group in the periodic table contains noble gases?
Group 17
Group 14
Group 18
Group 1
What is the process of neutralization?
The process of neutralization is the reaction between an acid and a base to form water and a salt.
The process of neutralization is when an acid reacts with a metal to produce hydrogen gas.
Neutralization involves the reaction of two bases to produce a gas and a liquid.
The process of neutralization is the combination of two acids to form a stronger acid.
What is the functional group of alcohols?
-COOH (carboxyl group)
-CHO (aldehyde group)
-OH (hydroxyl group)
-NH2 (amino group)
Name a common organic compound that is a carbohydrate.
starch
glucose
cellulose
sucrose
What is the difference between saturated and unsaturated hydrocarbons?
Saturated hydrocarbons have only single bonds; unsaturated hydrocarbons have double or triple bonds.
Saturated hydrocarbons contain only double bonds; unsaturated hydrocarbons contain only single bonds.
Saturated hydrocarbons are liquid at room temperature; unsaturated hydrocarbons are solid.
Saturated hydrocarbons have more hydrogen atoms than unsaturated hydrocarbons.
What is the significance of the periodic law?
It predicts the future discovery of new elements.
It explains the history of the elements discovered.
It categorizes elements based on their color.
The significance of the periodic law is that it provides a systematic framework for understanding the relationships between the properties of elements and their atomic structure.
