pH in Digestive System

Q.

Milk of magnesia is a/an:

1. Acid

2. Antacid

3. Alkali

4. Rock salt

Q.

Is milk a buffer?

Q.

The painful sting of a honey bee is due to the injection of methanoic acid. Which of the following substances would be the safest to apply on the skin to neutralize the sting?

1. Lemon juice $(\mathrm{pH}=4)$

2. Concentrated $\mathrm{HCl}$ $(\mathrm{pH}=1)$

3. Baking soda $(\mathrm{pH}=8)$

4. Clean-up liquid $(\mathrm{pH}=14)$

Q.

Define neutralization reaction. Give three applications of neutralization reactions.

Q. Which among the following is not an example of neutralization reactions in everyday life?

1. Treatment of acidic soil by powdered lime
2. Usage of conditioner after shampooing your hair
3. All of them
4. Antacid acting on acid in stomach

Q. What are the uses of bases.

Q. Identify X and Y in the following chemical reaction.​
${\mathrm{NaHCO}}_3\left(s\right)+X\to \mathrm{NaCl}\left(\mathrm{aq}\right)+Y+H_{2}O$

Q. If someone is suffering from the problem of acidity after overeating, which of the following would you suggest as remedy ?
Lemon juice, Vinegar, Baking soda solution
Give reason for your choice.
[2 Marks]