Advertisements
Advertisements
प्रश्न
Under what soil condition do you think a farmer would treat the soil of his fields with quick lime (calcium oxide) or slaked lime (calcium hydroxide) or chalk (calcium carbonate)?
उत्तर १
If the soil is acidic and improper for cultivation, then to increase the basicity of soil, the farmer would treat the soil with quick lime or slaked lime or chalk.
उत्तर २
If the soil that is on the field were too acidic then he would have to treat the soil with quicklime. If the soil is, too acidic it means that it will be having a low ph. Therefor the farmer would need to add lime or even slaked lime so that his soil is not too acidic.
APPEARS IN
संबंधित प्रश्न
Do basic solutions also have H+ (aq) ions? If yes, then why are these basic?
A milkman adds a very small amount of baking soda to fresh milk. Why does he shift the pH of the fresh milk from 6 to slightly alkaline?
What is an olfactory indicator?
Which of the following types of medicine is used for treating indigestion caused by over-eating?
(a) antibiotic
(b) analgesic
(c) antacid
(d) antiseptic
Name the scientist who developed the pH scale.
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?
Fill in the following blank with suitable words:
The more alkaline a solution, the............... the pH.
What is a universal indicator? For what purpose is it used?
A farmer has found that the pH of soil in his fields is 4.2. Name any two chemical materials which he can mix with the soil to adjust its pH.
The pH of a cold drink is 5. What will be its action on blue and red litmus solutions?
Name two common antacids.
State whether a solution is acidic, alkaline or neutral if its pH is:
(i) 9
(ii) 4
(iii) 7
(iv) 1
(v) 10
(vi) 3
A solution turns phenolphthalein indicator pink. The most likely pH of this solution will be:
(a) 6
(b) 4
(c) 9
(d) 7
Solution A turns universal indicator blue to purple whereas solution B turns universal indicator orange to red.
What will be the action of solution A on litmus?
Explain why the pH in a person's mouth becomes lower after each meal.
How could the person change his eating habits to lessen chances of suffering from tooth decay?
Turmeric is used as a _______.
Name the acid present in vinegar.
Write a note on:
Methyl orange
Using the knowledge of acids and bases, write a secret message with the help of baking soda and beet root. Explain how it works.
(Hint: Prepare baking soda solution in water. Use this solution to write the message on a sheet of white paper with a cotton bud. Rub a slice of fresh beetroot over the message.)
