hoa11

hoa11

11th Grade

12 Qs

quiz-placeholder

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hoa11

hoa11

Assessment

Quiz

Others

11th Grade

Practice Problem

Hard

Created by

Du Khanh

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12 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

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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