Natural Indicators in Chemistry

The video tutorial demonstrates how to create natural acid-base indicators using turmeric, dragon fruit, blue flowers, and red flowers. Each indicator is tested with vinegar, lime water, and salt solutions to observe color changes, indicating their acidic, basic, or neutral properties. The experiment concludes that natural indicators can effectively determine the pH nature of substances, with vinegar being acidic, lime water basic, and salt solution neutral.

What is the primary goal of the chemistry practical discussed in the video?

• To study the properties of metals

• To determine the pH of solutions using natural indicators

• To synthesize new chemical compounds

• To learn about chemical reactions

Which natural substance is used first as an indicator in the practical?

• Red flower

• Turmeric

• Blue flower

• Dragon fruit

What color does turmeric turn when it reacts with vinegar?

• Blue

• Bright yellow

• Red

• Green

What is the second natural indicator used in the experiment?

• Turmeric

• Dragon fruit

• Blue flower

• Red flower

How does the dragon fruit indicator change when added to lime water?

• Turns yellow

• Remains unchanged

• Turns blue

• Turns purple

Which flower is used as the third natural indicator?

• Yellow flower

• Blue flower

• White flower

• Red flower

What color does the blue flower indicator turn in vinegar?

• Green

• Orange

• Purple

• Yellow

What is the final natural indicator discussed in the video?

• Dragon fruit

• Red flower

• Turmeric

• Blue flower

What conclusion is drawn about the nature of vinegar?

• It is acidic

• It is a strong base

• It is neutral

• It is basic

What is the nature of salt solution according to the experiment?

• Neutral

• Basic

• Acidic

• Strongly acidic