Question

Section B
Answer the following questions:
1
4.
(b) What is the difference between a base and alkali?
Define the following terms (i) molarity of solution (ii) alkali
2. Describe the role of pH change during tooth decay.
3. How do antacid help during hyperacidity?
What happens in the following cases?
(a) Pain due to sting of bees is treated with Zn(OH), and NaHCO3.
(b) Acid released from stomach wall is in extra amount.
3. (a) What happens when a wasp attacks? What is the remedy of the sting of wasp?
(c) What happens when Al is heated with NaOH in the presence of water?​

Answer 1

Answer:

1. A solution with a pH of 11 is basic. 2. A solution with a pH of 5 is acidic. 3. The pH of pure water is 7 (neutral). 4. No, litmus paper does ...