Tag: know about some common gases

Questions Related to know about some common gases

Which of the following is/are correct regarding a glass rod ?

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

  1. Its a hard brittle solid

  2. Its a transparent solid

  3. Its a noncrystalline solid

  4. all of these

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Correct Option: D
Explanation:

Glass rod is hard brittle, transparent, non-crystalline.

Which of the following are correct regarding glass tubes?

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

  1. They are hollow pieces of various glass

  2. They are used to mix solid substances

  3. Can be cut into pieces of desirable purpose

  4. Interacts with the solution

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Correct Option: A,C
Explanation:

Glass tubed or glass tubing are hollow pieces of various glass types with a large variety of applications which are laboratory glassware. They can be cut into various sizes.

Glass is a non-crystalline amorphous solid that is often transparent. Since it is non-crystalline it is brittle in nature. Also, it does not react with chemicals.

A glass rod is :

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

  1. an equipment used to mix chemicals and liquid for laboratory purposes

  2. an equipment used to mix solids

  3. an equipment usedto mix gases

  4. none of these

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Correct Option: A
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.

Which of the followings are the correct characteristics of a glass rod?

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

  1. They are $10-40$ cm in length

  2. About half a centimeter thick

  3. They have rounded ends

  4. All of these

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Correct Option: D
Explanation:

Glass used in flame test is 10-40 cm in length, 1/2 cm thick and has rounded ends.

Which of the following are required to cut a glass tube?

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

  1. Bunsen Burner

  2. Triangular file

  3. Scissor

  4. Only $A$ and $B$

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Correct Option: D
Explanation:

A triangular file is any file that has a triangular cross section. The file has three tapered sides, which are used to file the internal surfaces of objects with acute angles.

A Bunsen burner, named after Robert Bunsen, is a common piece of laboratory equipment that produces a single open gas flame, which is used for heating, sterilization, and combustion.

Two identical containers are filled with gas. The first container is filled neon and the second with krypton. Both containers are placed at NTP conditions.
Which of the following factors will NOT be equal for the two containers?

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

  1. Number of particles

  2. Kinetic Energy

  3. Pressure

  4. Masses

  5. Number of moles

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Correct Option: A
Explanation:

Two identical containers are when filled with gas, one with $Ne$ and one with $Kr$ and are then placed at $NTP$. They will be present at same conditions of temperature and pressure.

Also, their volume will be same, since they occupy identical containers but their number of particles would be different.  

Which is the best definiion of a glass rod ?

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

  1. It is an equipment used in Chemistry laboratory to mix chemicals and liquids

  2. It is an equipment used in Physical laboratory to mix solids and gases

  3. It is an equipment used in Biology laboratory to separate mixures

  4. It is an equipment used at our home for cleaning purposes

Show answer
Correct Option: A
Explanation:

A glass rod, stirring rod or stir rod is a piece of laboratory equipment used to mix chemicals and liquids for laboratory purposes. It is generally found in Chemical laboratory as glass ususally does not react with chemicals. They are usually made of solid glass, about the thickness and slightly longer than a drinking straw, with rounded ends.

What does glass rod made up of :

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

  1. metal silicates

  2. lime

  3. silicon dioxide

  4. all of these

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Correct Option: D
Explanation:

Silicon dioxide is usually the main constituent of glass. Other components such as lime and metl silicates are used in making of glass. 

Of the many silica-based glasses that exist, ordinary glass is formed from a specific type called soda-lime glass, composed of approximately 75% silicon dioxide, sodium oxide from sodium carbonate, calcium oxide, also called lime, and several minor additives.

What does a glass rod made up of ?

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

  1. Borosilicates

  2. Pyrex

  3. Polypropylene

  4. All of these

Show answer
Correct Option: D
Explanation:

Of the many silica-based glasses that exist, ordinary glass is formed from a specific type called soda-lime glass, composed of approximately 75% silicon dioxide, sodium oxide from sodium carbonate, calcium oxide, also called lime, and several minor additives.

Borosilicate glass is a type of glass with silica and boron trioxide as the main glass-forming constituents.

Pyrex is a brand for a line of clear, low-thermal-expansion borosilicate glass used for laboratory glassware and kitchenware.

Polypropylene is also used as a component used in production of gas.

Which of the following materials are used while bending a glass tube?

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

  1. Bunsen burner

  2. Glazed file

  3. Both $A$ and $B$

  4. Scissor

Show answer
Correct Option: A