Indicators Acids and Bases

Pick out the salts from the following

(Check all the correct answers)

• H₂SO₄

• NaCl

• NH₄OH

• NH₄Cl

You are provided with two solutions 'X' and 'Y'. The colour of turmeric stains on your clothes on coming in contact with solution 'X' changes to brick red and when in contact with solution 'Y' changes to yellow. The solution 'X' and 'Y' provided to you are respectively.

• Soap solution and lemon juice

• Lemon juice and soap solution

• Lemon juice and vinegar

• Soap solution and sugar solution

Tags

NGSS.MS-PS1-2

Which of the following statement(s) is / are correct?

(Check all the correct options)

• Colour of caustic soda turns pink when phenolphthalein is added

• Hydrochloric acid turns blue litmus to red

• Sodium hydroxide turns china rose indicator to green in colour

• None of these is correct

Tags

NGSS.MS-PS1-2

The medicine used for indigestion problem will turn methyl orange to ---------- colour

• Pink

• yellow

• Blue

• Red

To test a solution in container 'A'. You dipped the filter paper in this solution and then in lime water. The colour of filter paper after dipping in lime water beomes brownish red. It shows that the solution in container 'A' was

• Red litmus solution

• Methyl red solution

• Turmeric solution

• Phenolphthalein solution

Tags

NGSS.MS-PS1-2

You dissolved a sample , in distilled water and then added a drop of this solution to a test- tube containing blue litmus solution which changes to red. It shows that the sample given to you is of:

• Soap

• Tomato juice

• Baking soda

• Sugar

Tags

NGSS.MS-PS1-2

Following observation were recorded upon performing experiments with sample 'A' and sample 'B'

(i) When 2-3 drops of phenolphthalein are added to sample 'A' it comes pink

(ii) When equal quantities of two samples are added in a test-tube, the test-tube becomes hot

(Check all the correct options)

• Sample 'A' is basic

• Sample 'B' is acidic

• (ii) observation confirms neutralisation

• We cannot say anything from the above observations

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What is the possible pH of sour milk?

• 14.0

• 7.0

• 1.0

• 5.0

The table shows the pH of several solutions. Which solution is the most acidic?

• vinegar

• milk

• water

• bleach

Tags

NGSS.MS-PS1-2

Four substances were tested for pH, lemon juice (pH 2), baking soda (pH 9), bleach (pH 12), and milk (pH 6). Which of the following correctly lists the substances from most basic to acidic?

• lemon juice, milk, baking soda, bleach

• bleach, baking soda, milk, lemon juice

• milk, lemon juice, baking soda, bleach

• baking soda, bleach, lemon juice, milk