Which of the following are isotones ?

Which of the following is an isotone of ''_6^12C ?

Which of the following is isotonic with 15% w/w glucose solution (sp.gr = 1.2 )?

Of the following pair of isotones is

10^(-3) M KCl solution will be isotonic with which of the following solutins ?

Which of the following pairs are Isotones?

Which of the following pairs are not isotones ?

Which of the following solution are isotonic with respect to 0.5 M NaCl solution having degree of dissociation=0.8.

Which of the following solutions are isotonic w.r.t. an aqueous NaCl solution having molarity 0.2 M and 50% dissociation?