Question

list any five precautions to be taken while performing an experiment in a Chemistry laboratory?​

Answer 1

Answer:

1. The vapours of many organic solvents are flammable or combustible. Do not expose electric sparks, open flames and heating elements to organic solvent vapours. UNLESS OTHERWISE STATED, ASSUME ALL ORGANIC SOLVENTS ARE FLAMMABLE.  
2. Many chemicals (solid, liquid or vapour) are poisonous. Do not taste chemicals. If it is necessary to smell a chemical, do so by fanning the vapours towards your nose. Never inhale directly. Avoid inhaling dust or fine powders. Use fume hoods and personal protective equipment when necessary.  
3. Do not pipet with your mouth.  
4. Be extremely careful when transferring, distilling or refluxing volatile liquids.  
5. Do not return used chemicals back to the stock container.  
6. Do not tap flasks under vacuum.  
7. Do not heat, measure or mix any chemicals in front of your face.  
8. Never heat a closed system – it will act as a bomb!  
9. Never pour water into concentrated acid. Pour acid slowly into water, stirring constantly. Mixing acid with water is often exothermic.  
10. Concentrated acids and bases are stored in the fume hood. Do not carry them to your bench.  
11. Make sure test tubes containing reactions are pointed away from people, especially when they are being heated. Pressurized gas cylinders must only be operated by the TA.

Answer 2

hlo dear

precautions to be taken while performing an experiment in a Chemistry laboratory are:-

➡keep the test tube away from face

➡dont inhale the gases directly

➡dont touch are look any acids directly

➡take the help of teacher while performing activity for best results

➡dont mix water to acid becoz it is an explosive reaction

hope it helps uu

@saba

thank uu❤