Tag: common laboratory equipments

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Multiple choice common laboratory equipments common laboratory apparatus and equipments laboratory equipments know about some common gases chemistry

Which piece of laboratory equipment would be used to grind large crystals into a powder?

  1. Crucible

  2. Evaporating dish

  3. Tongs

  4. Erlenmeyer flask

  5. Mortar and pestle
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation
Mortar and pestle $\rightarrow$
It is used for grinding and crushing chemicals for assorted lab procedures. It has various sizes and made of porcelain with unglazed interiors.
Hence a piece of laboratory equipment would be used to grind large crystals into a powder is mortar and pestle.
Hence the required answer is (E) Mortar and pestle.
Multiple choice common laboratory equipments common laboratory apparatus and equipments laboratory equipments know about some common gases chemistry

Which tool can be used to make precise measurements of varying volumes?

  1. Beaker

  2. Graduated cylinder

  3. Volumetric flask

  4. Test tube
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Beaker can be used to make precise measurements of varying volumes. A beakes is basically a broad cylindrical container with a flat bottom. It has a small spout to aid pouring. It also has some graduations for measurement of liquid.

Multiple choice common laboratory equipments common laboratory apparatus and equipments laboratory equipments know about some common gases chemistry

What will happen if glass rod is made from reacting compound :

  1. It may cause certain accidents in the laboratory when exposed to certain chemicals

  2. It will interacts with the chemicals in the solution

  3. it will be corrosive to the atmosphere

  4. All of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

If glass rod is made from reacting compound it will interact with the chemicals in the solution and contaminate the solution. It may cause certain accidents in the laboratory when exposed to certain chemicals. Also, it could be corrosive to atmosphere due to its reactive nature. 

Multiple choice common laboratory equipments common laboratory apparatus and equipments laboratory equipments know about some common gases chemistry

The functions of cork stopper are :

  1. restrics the vapour of the container to go out

  2. helps in condensation

  3. restricts moisture to come in contact with the solution

  4. both A and B
Reveal answer Fill a bubble to check yourself
A,B,C Correct answer
Explanation

Cork stopper is often used when a reaction is taking place in the flask or test tube and the by product or result of the reaction is desired to be collected. Its basic function is to plug.

It is widely used in fractional distillation. It restrics the vapour of the container from going out, helps in condensation and also restricts moisture to come in contact with the solution.

Multiple choice common laboratory equipments common laboratory apparatus and equipments laboratory equipments know about some common gases chemistry

Glass rod are generally used to stir liquid chemicals because :

  1. it provides controlled agitation to the reaction

  2. it does not react with chemicals in the solution

  3. it has a rounded ends to support proper stirring

  4. all of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A glass rod, stirring rod or stir rod is a piece of laboratory equipment used to mix chemicals and liquids for laboratory purposes. They are usually made of solid glass, about the thickness and slightly longer than a drinking straw, with rounded ends.

Since glass is a non-crystalline amorphous solid and is silica-based it does not react with chemicals in solution. 

Also, we can control the agitation as we ourselves stir the solution using glass rod.  

Multiple choice common laboratory equipments common laboratory apparatus and equipments laboratory equipments know about some common gases chemistry

A glass rod is also called :

  1. stirring rod

  2. stir rod

  3. both A and B

  4. none of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A glass rod, stirring rod or stir rod is a piece of laboratory equipment used to mix chemicals and liquids for laboratory purposes. They are usually made of solid glass, about the thickness and slightly longer than a drinking straw, with rounded ends.

Multiple choice common laboratory equipments common laboratory apparatus and equipments laboratory equipments know about some common gases chemistry

What is the first thing a chemistry student do if flames start coming out of the bottom of a Bunsen Burner?

  1. Adjust the collar.

  2. Adjust the flow rate of the gas.

  3. Notify the instructor.

  4. Find the fire extinguisher.

  5. Turn off the gas supply.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When flames start coming out of the bottom of the bunsen. One should adjust the collar of the burner so that it is sealed and flames stop coming out.

Multiple choice common laboratory equipments common laboratory apparatus and equipments laboratory equipments know about some common gases chemistry

Which selection would be used to purify solid $NaCl$ from an aqueous solution of $NaCl$?

  1. Crucible

  2. Evaporating

  3. Tongs

  4. Erlenmeyer flask

  5. Mortar and pestle
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Evaporating dish $\rightarrow$
It is used to evaporate excess solvents (most commonly water) to produce a concentrated solution or a solid precipitate of the dissolved substance. 
Hence it can be used to purify solid $NaCl$ from an aqueous solution of $NaCl$.
Hence the required answer is (B) Evaporating dish.
Multiple choice common laboratory equipments common laboratory apparatus and equipments laboratory equipments know about some common gases chemistry

Cork stopper are used as _____ in the chemistry laboratory.

  1. plug

  2. inlets

  3. outlets

  4. none of them
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cork stopper is often used when a reaction is taking place in the flask or test tube and the by product or result of the reaction is desired to be collected. Its basic function is to plug. 

Multiple choice common laboratory equipments common laboratory apparatus and equipments laboratory equipments know about some common gases chemistry

What are the uses of glass tube?

  1. Laboratory glassware

  2. Lighting application

  3. Solar thermal system and pharmaceutical packaging

  4. All of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Glass tubes or glass tubing are hollow pieces of various glass types (like borosilicate, flint, aluminosilicate, soda lime, lead or quartz glass) with a large variety of applications which are laboratory glassware, lighting applications, solar thermal systems and pharmaceutical packaging.