Q1: Mention the various steps which are involved in drawing a glass tube into a jet.
Answer:
- Selecting the ideal tube
- Heating the centre of the glass tube
- Breaking
- Filing
- Cooling
Q2: What type of glass is preferred for drawing out a jet?
Answer:
Soda-lime glass is used in drawing out a jet.
Q3: Why is the glass tube of a small diameter chosen for drawing out a jet?
Answer:
Because a larger diameter tube would have to be stretched too far, a small diameter glass tube was chosen.
Q4: Why should the diameter of the borer be less than the diameter of the tube to be inserted in the hole?
Answer:
This is done to ensure that the tube fits tightly in the hole.
Q5: What is the role of glycerine in the process of boring?
Answer:
The borer is lubricated with glycerine. This provides a smooth hole on boring.
Q6: Why is it required to round off the freshly cut edges of the glass tube?
Answer:
The glass tube’s freshly cut edges are sharp. They might hurt fingers as a result of mishandling.
Q7: What is the use of a fume cupboard?
Answer:
It’s utilised to conduct experiments that need the production of hazardous gases or vapours.
Q8: What type of flame would you use for general heating purposes?
Answer:
For general heating, a non-luminous oxidising flame is utilised since it produces the most heat due to the full burning of hydrocarbons.
Q9: What is the use of a wash bottle?
Answer:
It’s used to produce a thin stream of water for cleaning or transferring precipitate.
Q10: Why is the glass tube of a smaller diameter chosen for drawing out a jet?
Answer:
To draw a jet from a tube with a larger diameter, the tube must be stretched too far, which is not feasible.
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