2. A pH scale is given below. Which of the following mixtures can produce a neutral solution?

Neutral
Acid → ↑ Base
3 4 5 6 7 8 9 10 11
P Q R S

a. P and Q

b. P and R

c. R and S

d. All of these

3. Rahul took a turmeric paper and tried to draw flowers on it with the help of cotton buds dipped in solutions P and Q. The flower drawn with solution Q turned red. Solutions P and Q could be respectively

a. Lime water and lemon juice

b. Vinegar and soap solution

c. Common salt solution and baking soda

d. Both (b) and (c)

For the first question, the best choice for producing a neutral solution is b. P and R . In the second question, solutions P and Q could be b. Vinegar and soap solution .
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Answered by Anonymous | 2025-07-04

To address the given questions:
Question 2:

A pH scale is given, and you are asked which mixtures can produce a neutral solution. A neutral solution typically has a pH of 7. The options provided are points on the pH scale:


P and Q can be inferred as having pH values around 3 and 4 (acidic side).
R and S can be inferred as having pH values around 9 and 11 (basic side).

For a neutral solution:

Mixing a strong acid with a strong base can neutralize each other if they are in equal concentrations and amounts.

Therefore, considering the role of neutralization:

Option c. R and S potentially allows for the creation of a neutral solution, assuming they balance each other out properly.

Question 3:

Rahul used turmeric paper to test solutions P and Q . Turmeric paper is a natural pH indicator that turns red in basic environments.


Q turns turmeric paper red, indicating that Q is a basic solution.
P does not change the color (as per information given).

Comparing this with provided options:
a. Lime water (basic) and lemon juice (acidic). b. Vinegar (acidic) and soap solution (basic). c. Common salt solution (neutral, usually) and baking soda (basic). d. Both (b) and (c) are correct because both combinations have a basic component for Q and non-basic or weak acidic for P . However, focusing on which solution Q turns the turmeric paper red:
Since turmeric turns red in a basic solution and the choices are pairs of acidic and basic, option b. Vinegar and soap solution is most relevant since soap solution is basic and can turn turmeric paper red.

Answered by IsabellaRoseDavis | 2025-07-07