Question 20 of 34beginner🔧 ApplyMCQ1 mark

A solution turns red litmus blue, its pH is likely to be

Exercise: EXERCISES | Q: 1 | (Page Page 18)
For More Understanding

Explanation

According to the textbook, bases change the colour of red litmus to blue. Since the solution turns red litmus blue, it is a basic solution. The context states that a basic solution has a pH more than 7. Among the given options, only option (D) 10 is greater than 7, while options (A) 1, (B) 4, and (C) 5 are all less than 7 (acidic range). Therefore, the correct answer is (D) 10.

Solution Steps

  1. Step 1: Identify that the solution turns red litmus blue, which indicates it is a basic solution.

  2. Step 2: Recall from the context that a basic solution has a pH more than 7.

  3. Step 3: Compare the given options - 1, 4, 5, and 10.

  4. Step 4: Select the option with pH greater than 7, which is 10 (Option D).

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