Q15. Mixtures of which of the following two solutions will produce a precipitate? Select one: a. NaNO3 (aq) and BaSO4 (a

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Q15. Mixtures of which of the following two solutions willproduce a precipitate?
Select one: a. NaNO3 (aq) and BaSO4 (aq) b. KCl (aq) and NH4NO3(aq) c. AgNO3 (aq) and NaCl (aq) d. NH4Cl (aq) and KOH (aq) e.LiNO3 (aq) and Na2CO3 (aq)
Q10. Which one of the following atoms/ions has the largestradius?
Select one:
a.
Al3+
b.
Na
c.
Al
d.
Mg2+
e.
Na+
Q13.
Two isotopes of Chlorine have mass numbers of 35 and 37respectively. Which of the following statementsare true regarding these isotopes?
Select one:
a.
The number of electons and neutrons is the same in both isotopesbut the number of protons is different.
b.
Each isotope has a different atomic number.
c.
The number of protons and electrons is the same in both isotopesbut the number of neutrons is different.
d.
Both isotopes contain the same number of protons, neutrons andelectrons.
e.
The number of protons and neutrons is the same in both isotopesbut the number of electrons is different.