Chemistry, asked by feloemd, 5 months ago

why was the test tube held in the flame at a 45 angle

Answers

Answered by kyleeeeeee
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 rahul123437
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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