chemistry techniques

one of the following is a physical change

• Melting of ice
• Burning of wood
• Rusting of iron
• Photosynthesis

chromatography is a -------- technique

• separation
• cooking
• painting
• dancing

how many steps are involved in gravimetric analysisi

• Two steps
• Three steps
• Four steps
• Eight steps

which of the following is a chemical change

• Melting of ice
• Boiling of water
• Rusting of iron
• Cutting of paper

which of the following is used to measure the volume of a liquid in the laboratory

• Bunsen Burner
• Test Tube Rack
• measuring cylinder

• spatula

vertical tower extraction technique is preferred because

• It is more cost-effective
• It is faster
• It reduces environmental impact
• economical on space