pH Scale

Q. Why acids are sour in taste and bases are bitter in taste?

Q.

What is the pH range at which our body works?

1. 13 to 14

2. 2 to 3

3. 7 to 7.8

4. 10 to 11

Q.

Mathematically value of ph

Q.

Which of the following is acidic in nature?

1. Human Blood

2. Lime juice

3. Lime water

4. Antacid

Q.

Define acids . differentiate between strong acids and weak acids

Q.

What is the pH of pure water

Q. If ion concentration increases then the pH .

1. $H_3{O}^{+}$
2. decreases
3. remains same
4. $O{H}^{-}$

Q.

Which of the following will be the strongest base?

1. pH = 13

2. pH = 8.5

3. pH = 7.5

4. pH = 11.5

Q. How does change in temperature affect the pH of a substance?

Q.

pH of pure water is 7. the H+ concerntration is what?

Q.

Is honey alkaline or acidic?

Q. Match the acids given in Column I with their correct source given in Column II
$\begin{array}{cc}\text{Column I}& \text{Column II}\\ \text{A. Lactic acid}& \text{1. Tomato}\\ \text{B. Acetic acid}& \text{2. Lemon}\\ \text{C. Citric acid}& \text{3. Vinegar}\\ \text{D. Oxalic acid}& \text{4. Curd}\end{array}$

Q. Choose the incorrect statement from the options given below.

1. Antacid can neutralise excess acid produced by the stomach.
2. Stomach produces $\text{HCl}$ for the digestion of the food.
3. Antacids have pH value more than 7.
4. Antacids are acidic in nature.

Q. What type of indicator is phenolphthalein?

1. Acidic
2. Equilibrium (titration)
3. Basic
4. Neutral

Q. When phenolphthalein gives pink colour in the given salt solution the salt solution will be:

1. acidic
2. basic
3. neutral
4. phenolphthalein does not give pink colour in solution

Q. how to calculate ph of a substance?

Q.

What is the pH range at which our body works?

1. 2 to 3

2. 7 to 7.8

3. 13 to 14

4. 10 to 11