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प्रश्न
A milkman adds a very small amount of baking soda to fresh milk. Why does this milk take a long time to set as curd?
उत्तर १
Since this milk is slightly more basic than usual milk, the acids produced to set the curd are neutralized by the base. Therefore, it takes a longer time for the curd to set.
उत्तर २
The milkman made the milk alkaline by adding baking soda. The alkaline medium slows down the transformation of the milk into curd. The lactic acid produced undergoes neutralisation, so the milk takes a long time to set as curd.
संबंधित प्रश्न
What effect does the concentration of H+ (aq) ions have on the nature of the solution?
Is the distilled water acidic/basic/neutral? How would you verify it?
- Both acids and bases change colour of all indicators.
- If an indicator gives a colour change with an acid, it does not give a change with a base.
- If an indicator changes colour with a base, it does not change colour with an acid.
- Change of colour in an acid and a base depends on the type of the indicator.
Which of these statements are correct?
Fill in the blank in the following sentences:
Acids have a ..........................taste and they turn..........................litmus to..........................
If someone is suffering from the problem of acidity after overeating, which of the following would you suggest as remedy?
Lemon juice, Vinegar, Banking soda solution
Give reason for your choice.
Name the indicator which can give us an idea of how strong or weak an acid or base is.
What is the name of the indicator which can be used for testing the pH of a solution?
Two solutions X and Y are tested with universal indicator. Solution X turns orange whereas solution Y turns red. Which of the solutions is a stronger acid?
Water is a neutral substance. What colour will you get when you add a few drops of universal indicator to a test-tube containing water?
The pH values of six solutions A to F are given below:
A = 0, B = 11, C = 6, D = 3, E = 13, F = 8
Which of the above solutions are (i) acids (ii) alkalis?
The pH of a cold drink is 5. What will be its action on blue and red litmus solutions?
Someone put some universal indicator paper into vinegar. The pH is 3. What does this tell you about the vinegar?
A solution turns blue litmus red. Its pH is likely to be:
(a) 7
(b) 5
(c) 8
(d) 14
The daffodil plants grow best in a soil having a pH range of 6.0 to 6.5. If the soil in a garden has a pH of 4.5, which substance needs to be added to the soil in order to grow daffodils?
(a) salt
(b) lime
(c) sand
(d) compost
How could the person change his eating habits to lessen chances of suffering from tooth decay?
Write a note on:
Litmus
Write a note on:
Methyl orange
Take a shirt with turmeric powder strain. Wash the shirt with soap. Do you observe any change in the colour? Why?
