why was the test tube held in the flame at a 45 angle
Answers
Answered by
5
Answer:
The test tube must be inclined at an angle of 45 degrees horizontal. It must be moved back and forth over the flame to make the heating uniform.
Explanation:
Hold the tube at an angle, and keep it moving so one spot doesn’t suddenly heat and explode the contents out of the tube. Never hold a tube straight up above a flame. It might suddenly start to boil causing the contents to explode out. Lastly, it allows the contents to be heated - while keeping the mouth of the test tube away from your face.
Answered by
3
Test tubes when held in the flame is always held at an angle of 45°
Explanation:
- It is because when we heat the test tube from the base.
- The liquid present in the test tube when heated can turn into gas.
- To avoid rapid expansion and production of gas it is held at an angle
- The Heating of the test tube at an angle will reduce the pressure on the substances.
- At an angle, it will allow the gases to escape into the air.
- Test tubes must be pointed away from the person holding it to avoid accidents.
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