കുടിവെള്ളത്തിൽ അനുവദനീയമായ ഫ്ളൂറിന്റെ അളവ്
A1.7 പിപിഎം
B1.5 പിപിഎം
C2 പിപിഎം
D1 പിപിഎം
No.1 PSC Learning App
★
★
★
★
★
Related Questions:
The electron affinity of chlorine is highest than that of fluorine due to–
Which of the following scientist arranged the elements on the basis of Octave theory?
What would be the atomic number of the element in whose atom the K and L shells are full ?
Which among the following is not an Isotope of Hydrogen?
Which of the following elements has 2 shells and both are completely filled?