Questions and Answers
Which of the following would be an effective remedy for acidity?
What color does litmus solution turn in an acidic environment?
What is the taste of acids commonly described as?
Which natural indicator is derived from lichen?
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Which of the following indicators turns yellow in the presence of a base?
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What happens to red litmus paper in a basic solution?
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What type of substances cancel each other's effects?
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Which of the following is NOT a natural indicator?
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What color is the litmus solution when it is neutral?
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What color does turmeric turn in a basic solution?
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Study Notes
Acids and Bases
- Acids give food a sour taste; common examples include citrus fruits.
- Bases exhibit a bitter taste; baking soda is a typical example.
- Baking soda solution can neutralize excess acidity in the stomach.
Properties of Acids and Bases
- Acids change blue litmus paper to red.
- Bases change red litmus paper to blue.
- Turmeric is another natural indicator that changes color based on pH.
Indicators
- Litmus solution is a natural indicator derived from lichen; it appears purple in neutral solutions.
- Red cabbage juice, turmeric, and the petals from flowers like Hydrangea, Petunia, and Geranium can also indicate acidity or alkalinity.
Practical Observations
- Soaps (basic) can turn curry stains reddish-brown on white cloth.
- Rinsing with water restores turmeric’s yellow color, demonstrating the reversible nature of pH changes.
Synthetic Indicators
- Methyl orange and phenolphthalein are examples of synthetic indicators used to test for acids and bases.
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Description
Test your knowledge on acids, bases, and salts in this quiz based on Chapter 2 of Chemistry. You will explore the properties of these substances and their applications in everyday life, such as remedies for acidity. Challenges include identifying properties and suggesting appropriate solutions based on your understanding.
