+91-87964 74404
FlagBACK
Question icon
Grade 12th pass10 grade science

Question 12. A sample of soil is mixed with water and allowed to settle. The clear supernatant solution turns the pH paper yellowish orange. Which of the following would change the colour of this pH paper to greenish blue? [NCERT Exemplar] (a) Lemon juice (b) Vinegar (c) Common salt (d) An antacid

Profile image of Harshit Singh
5 Years agoGrade 12th pass
Answers icon

1 Answer

Profile image of Pawan Prajapati
5 Years ago
(d) As pH paper turns greenish blue for weakly basic compound and antacids contain weak base like Mg(OH)2. So, an antacid would change the colour of this pH paper to greenish blue. Other options (a) and (b) contain acids and option (c) is a neutral salt.

Other Related Questions on 10 grade science

question mark

What type of questions asked from the lesson of magnetic effect of electric current 


10 grade science
1 Answer Available

Last Activity: 10 Months ago

question mark

Wavelength of green light is

A) 400-450 nm

B) 500-550 nm

C) 660-720 nm

D) 720-800 nm

10 grade science
1 Answer Available

Last Activity: 0 Years ago

question mark

What is the difference between anaerobic & aerobic respiration? Name some organism that uses the aerobic mode of respiration?

10 grade science
1 Answer Available

Last Activity: 0 Years ago

question mark

What are the main components of our environment? Explain each of them briefly.

10 grade science
1 Answer Available

Last Activity: 0 Years ago

question mark

What are examples of hydrotropism plants?

10 grade science
1 Answer Available

Last Activity: 0 Years ago