pH Scale

Q.

what is alkaline solution

Q.

The pH of boiling water is $6.4$. This implies that boiling water is:

1. Slightly basic

2. Slightly acidic

3. Neutral

4. Amphoteric

Q. What is neutral solution

Q.

Is KCL an acid or a base?

Q. Which acid is found in coffee? What is it's pH value?

Q.

What is the approximate pH of Amla juice?

Q.

You have four solutions A, B, C, and D. the pH of solution A is 6, B is 9, C is 12 and D is 7. Arrange the above four solutions in the increasing order of ${\mathrm{H}}^{+}$ ions.

Q.

What is tap water pH level?

Q.

Which of the following shows a pH range for an alkaline solution?

1. 0 to 3

2. 6 to 7

3. 8 to 10

4. 4 to 6

Q.

Does adding salt to vinegar make it more acidic?

Q.

When red litmus is added to a solution of borax it turns blue. What can you say about the pH of borax solution?

Q.

An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change?

1. Baking powder

2. Lime

3. Ammonium hydroxide solution

4. Hydrochloric acid

Q.

What is the Ph of Water(H₂​​​​​​​0)?

Q. What will happen if I mix a base and a neutral solution

Q.

Question 23

You are provided with four test tubes containing sugar solution, baking soda solution, tamarind solution, salt solution. Write down an activity to find the nature of each solution

Q.

What is the pH value of a solution in which [H⁺] is ${10}^{-10}$ mole per liter? Is it an acidic, alkaline or neutral solution?

Q.

Is rice starch acidic or basic in nature?

Q. Which one of the following salts on dissolution in water will give a solution of pH less than 7?

1. $\text{NaCl}$
2. $\text{KCN}$
3. ${\text{CH}}_3\text{COONa}$
4. ${\text{NH}}_4\text{Cl}$

Q.

Three liquids are given to you. One is hydrochloric acid, another is sodium hydroxide and the third is a sugar solution. How will you identify them? You have only a turmeric indicator.

Q. how do you prepare concentrated acid or base?

Q. Turmeric stain on a shirt changes toTurmeric stain on a shirt changes to

Q. Fresh milk has a pH of 6. Explain why the pH changes as it turns into curd?

Q.

Which of the following is/are not true for an acid?

1. Acids are present in fruits.

2. Acids turn phenolphthalein colourless.

3. Acids are corrosive in nature.

4. Acids have pH range 8 to 14.

Q.

Solution E has a pH of 13, solution F has a pH of 6 and solution G has a pH of 2.

(b) Which solution liberates ammonia from ammonium nitrate on heating?

Q.

Sir/mam what is pH value and what is it's full form?

Q.

Turmeric stain on a shirt changes to ______ colour, when it is washed with soap.

Q. ${}^{\prime }p{H}^{\prime }$ is a measure of the acidity or alkalinity of a liquid such as a chemical solution, blood, water or a medium like soil. The term ${}^{\prime }p{H}^{\prime }$ comes from:

1. Hydrogen purity
2. Pure hydrogen
3. Poue voir hydrogene (or hydrogen power)
4. Principle of hydrogen

Q. pH of saliva is ___________ in nature.

Q. acid present in our stomach helps us to digest food.

1. Formic
2. Sulphuric
3. Hydrochloric
4. Tartaric

Q. The $pH$ of lemon juice is:

1. 10.2 to 11.4
2. 4.2 to 4.4
3. 6.2 to 6.8
4. 2.2 to 2.4