ABS Quiz 01

1. Which of the following is false regarding acids?

• Acids turn blue litmus to red
• Acids are sour to taste
• Acids turn red litmus to blue
• Acids are soapy to touch

2. Which of the following is true regarding bases?

• Bases turn blue litmus to red
• Bases are sour to taste
• Bases turn red litmus to blue
• Bases are soapy to touch

3. Which of the following are natural acid, base indicators?

• Methyl orange
• Phenolphthalein
• Blue litmus
• Red litmus

4. Which of the following are synthetic acid, base indicators?

• Methyl orange
• Phenolphthalein
• Blue litmus
• Red litmus

5. What is the colour of litmus in neutral solution?

• Red
• Blue
• No colour
• Purple

6. Which of the following is not a mineral acid?

• Hydrochloric acid
• Citric acid
• Nitric acid
• Sulphuric acid

7. Which of the following is/are not acid/s?

• Hydrochloric acid
• Ammonium hydroxide
• Sodium hydroxide
• Sulphuric acid

8. Which of the following is/are not base/s?

• Hydrochloric acid
• Ammonium hydroxide
• Sodium hydroxide
• Sulphuric acid

9. Some fruits like mango, lemon, raw grapes, orange, etc., have a sour taste due to the presence of....

• Acetic acid
• Citric acid
• Lactic acid
• Oxalic acid

10. Which of the following indicators turn red in an acidic solution?

• Phenolphthalein
• Litmus
• Turmeric
• Methyl orange