浙江大学国际联合学院（海宁国际校区）

Chemical safety Back

Single-choice question

The wrong operation of super thermostatic water bath is

Correct answer：

C

Question 5

Where should large quantities of reagents be placed?

A:Reagent rack

B:In the reagent cabinet in the laboratory

C:Lower cabinet of the test bench

D:Reagents (this just do not make sense; same as A)

Correct answer：

D

Question 6

Which of the following statements is incorrect about experiments with the high-temperature experimental device is:

A:Pay attention to the radiation of high temperature to human body

B:Be familiar with the operation of high temperature equipment and operate it carefully

C:If it is necessary to place a high temperature device such as a high temperature furnace on an experimental bench with poor heat resistance, keep a gap of more than one centimeter between the device and the table, and put a heat shield to prevent the table from catching fire

D:Experiments using high-temperature devices are required to be carried out in fireproof buildings or rooms equipped with fireproof facilities and are required to be airtight to reduce heat loss

Correct answer：

D

Question 7

Perchloric acid, ammonium nitrate, potassium nitrate, perchloric acid and perchlorate, dichromic acid and dichromic acid, permanganate and permanganate, benzoic acid peroxide, phosphorus pentoxide are strong oxidants. It should be noted during use:

A:The ambient temperature should not be higher than 30℃

B:Well ventilated

C:Do not heat, do not use with organic or reductive materials

D:All of the above

Correct answer：

D

Question 8

Chemical dangerous drugs may irritate the eyes, burn the skin, damage the respiratory tract, paralyze the nerves, burn and explode. Please pay attention to the safety of the use of chemical drugs. Which of the following statements is incorrect?

A:Understand the characteristics of the dangerous chemicals used, do not operate blindly, do not use illegally

B:.Take good care of the dangerous chemicals around, and keep the labels complete and sealed. Avoid heat, light, and fire.

C:Large quantities of dangerous chemicals can be stored indoors

D:Prevent the accumulation of high concentration of flammable and explosive gas indoors

Correct answer：

C

Question 9

During reflux and heating, the amount of liquid shall not exceed the flask capacity by which of the following amounts:

A:0.5

B:0.666666666666667

C:0.75

D:0.8

Correct answer：

B

Question 10

During centrifuge operation, to prevent liquid overflow, how much of the volume of the centrifuge tube should not be filled with samples?

A:0.666666666666667

B:1/3

C:1/2

D:3/4

Correct answer：

A

Question 11

The heating temperature of ordinary plastic and plexiglass products shall not exceed

A:40℃

B:60℃

C:80℃

D:100℃

Correct answer：

B

Question 12

Which of the following is the correct procedure for obtaining chemicals?

A:Wear rubber gloves and protective glasses whenever possible when using corrosive or irritating drugs.

B:When dumping, do not look down directly at the mouth of the container; a rubber ball should be used for suction.

C:When opening the toxic gas container, you should take the anti-virus appliance.

D:.All of the above

Correct answer：

D

Question 13

When taking reagents, which of the following statements is incorrect?

A:Do not touch the reagent by hand, so as not to endanger health or taint the reagent

B:The bottle stopper should be upside down on the table so as not to get dirty. After taking the reagent, cover it tightly and put the reagent bottle back in its original place with the label facing outwards

C:Use a clean spoon to take solid reagent, wash and dry the used spoon before reusing

D:Excessive reagent can be poured back in the original bottle to avoid waste

Correct answer：

D

Question 14

When handling toxic agents, protective measures to be taken include:

A:Wear appropriate personal protective equipment

B:Understand reagent toxicity and operate in fume hood

C:Make emergency rescue plan

D:All of the above

Correct answer：

D

Question 15

What preparations should be made before the experiment begins?

A:Must prepare carefully, clear experimental train of thought

B:The instrument should be carefully checked for damage, master the key points of proper use of the instrument, make clear the water, electricity and gas pipeline switch and marking, keep a clear mind, avoid illegal operation

C:Understand the properties and possible hazards of the substances used in the experiment and the corresponding precautions

D:All of the above

Correct answer：

D

Question 16

Which of the following statements is false about a laboratory microwave oven?

A:After microwave oven is on, it can produce very strong electromagnetism radiation; operator should be far from it

B:It is strictly prohibited to heat inflammable, explosive and other dangerous chemicals in the microwave oven

C:The microwave oven in the lab can also heat food

D:When using the microwave oven to heat the airtight pressure vessel, please pay attention to the operation in strict accordance with safety regulations

Correct answer：

C

Question 17

When acetylene is used in the laboratory, it is correct to say:

A:There should not be an open fire or electric spark in the room

B:Room should be airtight

C:There should be high humidity indoors

D:Acetylene gas can be piped in copper

Correct answer：

A

Question 18

A lot of glassware is used in the experiment. It is easy to break. What should we pay attention to in order to avoid cutting?

A:Do not use too much force during assembly, and do not use the force far away from the connecting part

B:Forced connection due to wrong caliber is not allowed

C:Broken glass surface should be smooth wihtout edges and corners

D:All of the above

Correct answer：

D

Question 19

When using inflammable and explosive chemicals, incorrect operation is:

A:You can heat it over an open flame

B:Operate in fume hood

C:Do not slam

D:Use water bath or oil bath when heating

Correct answer：

A

Question 20

At higher room temperature, some reagents like ammonia water are likely to expel a gaseous or liquid flow immediately upon opening. What should be done first, before opening the bottle stopper again?

A:First soak the reagent bottle in hot water for a while

B:It oscillates for a period of time

C:First soak the reagent bottle in cold water for a while

D:Turn the bottle upside down

Correct answer：

C

Question 21

In hot weather, when turning on corrosive liquid, one should:

A:Directly use your hand

B:Cover the stopper with a towel first

C:Wear rubber gloves

D:Cover the stopper with paper

Correct answer：

B

Question 22

When putting rubber tube (plug) on the glass tube, the incorrect way is:

A:Pipe end should be smooth

B:Wrap your hands in cloth or wear thick gloves to prevent cutting

C:Thin-walled glass tubes can be used

D:Add some water or lubricant

Correct answer：

D

Question 23

The correct preparation method of dilute sulfuric acid solution is:

A:While stirring, add water to concentrated sulfuric acid

B:While stirring, add concentrated sulfuric acid to water

C:It do not matter whether water is added to concentrated sulfuric acid or concentrated sulfuric acid is added to water

D:Pour the water and concentrated sulfuric acid into the container and mix

Correct answer：

B

Question 24

In the following experimental operations, the correct statement is:

A:The volumetric flask, measuring cylinder and other containers can be heated

B:When operating the fume hood, the head can be put into the fume hood for observation

C:Non-disposable protective gloves must be rinsed before removal, and disposable gloves must be removed from the inside out backwards and forwards before throwing away

D:You can hold the lid of a plastic or glass bottle and carry it

Correct answer：

C

Question 25

Which of the following gases can be handled in a fume hood?

A:Hydrogen sulfide

B:Hydrogen fluoride

C:Hydrogen chloride

D:All of the above

Correct answer：

D

When receiving highly toxic articles, you must:

A:Two-person requisition (one of them must be a laboratory teacher)

B:Single -person requisition

C:Two-person requisition (both are students in the lab)

Correct answer：

A

Question 49

Before transporting the chemical waste to the temporary collection and transit warehouse of each campus, each laboratory should:

A:Stacked in the hallway

B:Stacked in the aisles

C:Centralized and classified storage in the laboratory with labels

Correct answer：

C

Question 50

The waste chemical reagents in the laboratory and the toxic and harmful liquid wastes and wastes from the experiments may:

A:Centralized classification and storage, labeled and sent to the transfer station for centralized

B:Pour down the drain

C:Litter away

Correct answer：

A

Question 51

Empty bottles that have been used up or left over should:

A:Discarded with household garbage

B:Return to the logistics technical material service center of the school

C:Return to school security

Correct answer：

B

Question 52

Which of the following substances cause skin burns?

A:Phosphorus pentoxide

B:. Phosphorus pentasulfide

C:Phosphorus pentachloride

D:All of the above

Correct answer：

D

The first step in the correct treatment of a chemical burn to the eye is to:

A:Apply eye ointment

B:Open eyelid immediately, rinse eyes with water

C:Go to the hospital immediately for emergency treatment

Correct answer：

B

Question 67

Put the following statements in the correct order for the treatment of acid burns: ①Wash with 1 ~ 2% NaHCO3 solution. ②Wash immediately with plenty of water ③Send to the hospital

A:①③②

B:②①③

C:③①②

D:③②①

Alkali metals such as sodium and potassium must be stored in:

Correct answer：

C

Question 103

The following substances are in the correct order, from most to least toxic:

A:Formaldehyde, benzene, styrene, acetone

B:. Benzene, formaldehyde, toluene, acetone

C:Toluene, formaldehyde, benzene, acetone

D:Benzene, acetone, toluene, formaldehyde

Correct answer：

B

Question 104

The lower the flash point, the easier it is to burn. The solvent with flash point above -4℃ is:

A:Methanol, ethanol, acetonitrile

B:Ethyl acetate, methyl acetate

C:Ether, petroleum ether

D:Gasoline, acetone, benzene

Correct answer：

A

Question 105

The experimenter should take care to prevent X-ray exposure by the experimental equipment. Which of the following apparatus can produce X-rays?

A:X ray diffractometer

B:721 spectrophotometer

C:LC(Liquid Chromatogram)

D:Gas chromatography

Correct answer：

A

Question 106

For safety, the metals to be stored in kerosene are:

A:Sodium

B:Aluminum

C:Iron

D:Calcium

Correct answer：

A

Question 107

Which of the following are not flammable liquids:

A:5% dilute sulfuric acid

B:Ethanol

C:Benzene

D:Carbon disulfide

Correct answer：

A

Question 108

Which of the following statements are incorrect:

A:Acetone and ethanol have strong volatility and flammability, neither of which can be used in any place with open fire

B:Acetone can cause damage to the liver and brain, so avoid breathing acetone gas

C:Strong acids, strong bases, etc cannot come into contact with the body

D:Weak acids and bases can come into contact with the body during use

Correct answer：

D

Question 109

Which of the following description of the mixture is incorrect:

A:Chromium trioxide sulfuric acid solution mixed with organic matter, may explode

B:Ammonia nitrate may burn when mixed with activated carbon

C:Perchloric acid mixed with metal salts can explode

D:Perchloric acid mixed with hydrochloric acid can explode

Correct answer：

D

Question 110

Which of the following is an explosive substance?

A:Zno

B:Trinitrotoluene

C:Carbon tetrachloride

D:Iron oxide

Correct answer：

B

Question 111

Which of the following substances stored in the air is liable to explosion?

A:Styrene

B:Paraxylene

C:Benzene

D:Toluene

Correct answer：

A

Question 112

Which of the following substances is liable to explode when mixed with ethanol?

A:Hydrochloric acid

B:Ether

C:Perchlorate

D:Acetone

Correct answer：

C

Question 113

Which is not often used in the laboratory as a disinfectant for skin or common laboratory equipment?

A:0.2%-1% bleach solution

B:70% ethanol

C:2% tincture of iodine

D:0.2% - 0.5% chlorhexidine

Correct answer：

A

Question 114

Which of the following reagents does not need to be stored in a brown bottle?

A:Ferrous sulfate

B:Potassium permanganate

C:Sodium sulfite

D:Sodium sulfate

Correct answer：

D

Question 115

Which of the following substance is non-toxic:

A:Ethylene glycol

B:Hydrogen sulfide

C:Ethanol

D:Formaldehyde

Correct answer：

C

Question 116

Which of the following substances should be kept out of contact with water to avoid danger:

A:Sodium chloride

B:Calcium chloride

C:Aluminum tetrahydrate

D:Calcium sulphate

Correct answer：

C

Question 117

Which of the following substances is not highly toxic:

A:Methyl iodide, propanitrile

B:Chloroacetic acid, acrolein

C:Pentachlorophenol, thallium

D:Barium sulfate

Correct answer：

D

Question 118

Which of the following are not classified as hazardous chemicals:

A:Gasoline, flammable liquid

B:Radioactive substances;

C:Oxidants, organic peroxides, highly toxic drugs and infectious agents

D:Potassium chloride

Correct answer：

D

Question 119

Which of the following solvents is not a flammable liquid?

A:Methanol, ethanol

B:Carbon tetrachloride, acetic acid

C:Butyl acetate, petroleum ether

D:Acetone, toluene

Correct answer：

B

Question 120

Which of the following reagents do not have to be kept separately:

A:Ether and perchloric acid

B:Benzene and hydrogen peroxide

C:Acetone and nitro compounds

D:Concentrated sulfuric and hydrochloric acid

Correct answer：

D

Question 121

Generally, chemical reagents with flash point below 25℃ are listed as flammable chemical reagents. They are mostly highly volatile liquids. Which of the following is not a flammable chemical agent?

A:Ether

B:Benzene

C:Glycerin

D:Gasoline

Correct answer：

C

Question 122

Solid chemical reagents such as metal potassium, sodium, lithium, calcium and calcium carbide can react violently when exposed to water and give off a large amount of heat. They can also produce explosion. How should they be stored?

A:Stored directly in the reagent bottle

B:Doused in kerosene (the container must not leak). There should be no hydrochloric acid, nitric acid or other substances emitting acid fog nearby.

C:Stored in a paper sealed package

D:Put in an iron box

Correct answer：

B

Question 123

Among the following gases, the non-toxic gas is:

A:Oxygen

B:Carbon monoxide

C:Hydrogen sulfide

D:Hydrogen cyanide

Correct answer：

A

Question 124

Among the following gases, the toxic gas is:

A:Oxygen

B:Nitrogen

C:Chlorine

D:Carbon dioxide

Correct answer：

C

Question 125

The most poisonous of the following gases is:

A:Chlorine

B:Phosgene (COCL2)

C:Sulfur dioxide

D:Sulphur trioxide

Correct answer：

B

Which of the following vessels shall be used as the receiving and reacting vessels for reduced pressure distillation?

A:Thin-walled tube

B:Conical flask, round bottom flask

C:Flat bottom flask

Correct answer：

B

Question 132

Strong oxidants can form explosive mixtures with organic matter, magnesium powder, aluminum powder and zinc powder. Which of the following is safe?

A:H ₂ O2

B:NH4NO3

C:K2SO4

D:Perchloric acid and perchlorate

Correct answer：

C

Question 133

Benzene is a highly toxic chemical. Which of the following statements are correct:

A:For short-term exposure, benzene will cause the central nervous system paralysis, resulting in acute poisoning.

B:长期接触，苯会对血液造成极大伤害，引起慢性中毒。

C:It is a carcinogen that can irritate skin and mucous membranes.

D:All of the above

Correct answer：

D

Question 134

Acetone is a low-toxic chemical. Which of the following statements are correct:

A:A. It has a flash point of -18℃ and is highly flammable.

B:It anesthetizes the nervous system and stimulates the mucous membrane.

C:Its boiling point is only 56℃, very volatile

D:All of the above

Correct answer：

D

True or False question