Trắc nghiệm AVCN 2022 - 2023
Quiz
•
English
•
University
•
Practice Problem
•
Medium
Luân Chí
Used 4+ times
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40 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Specialized proteins called enzymes accelerate chemical reactions in living systems by ………………. the activation energy.
increasing
lowering
raising
generating
Answer explanation
Các protein chuyên biệt được gọi là enzyme đẩy nhanh các phản ứng hóa học trong hệ thống sống bằng ………………. năng lượng kích hoạt.
hạ thấp
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
When sugar is added into water, a ……………. mixture is formed.
heterogenous
homogeneous
homogeneity
heterogeneity
Answer explanation
Khi cho đường vào nước thì……………. hỗn hợp được tạo thành.
đồng nhất
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A compound is a substance which consists of …………………………. atoms.
only one kind of
two or more different kinds of
homogeneous
heterogenous
Answer explanation
Hợp chất là chất gồm…………………………. nguyên tử.
hai hay nhiều loại khác nhau
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The total number of protons and neutrons is the atomic ……………
volume
weight
integer
valence
Answer explanation
Tổng số hạt proton và nơtron là ........ nguyên tử.
trọng lượng
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chemical reactions are the making or breaking of chemical ………… between atoms.
valence
forces
bonds
number
Answer explanation
Phản ứng hóa học là sự tạo ra hoặc phá vỡ ………… chất hóa học giữa các nguyên tử.
liên kết
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the laboratory, a grinding mortar with a pestle are generally made of ……………….
porcelain
glass
plastic
metal
Answer explanation
Trong phòng thí nghiệm, cối nghiền có chày thường được làm bằng ………………... .
sứ
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
All gases are completely …………… with each other, forming one phase.
miscible
dissolve
evaporate
gaseous
Answer explanation
Tất cả các khí……………hoàn toàn với nhau tạo thành một pha.
có thể trộn
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