14. Which set of substances are noble gases?
A. Helium and Neon
B. Hydrogen and Helium
C. Nitrogen and Silicon
D. Silver and Gold
15. Which is a compound used at home in cleaning
household wares?
A. baking soda
B. brown sugar
C. ethyl alcohol
D. soy sauce
A. Helium and Neon
B. Hydrogen and Helium
C. Nitrogen and Silicon
D. Silver and Gold
15. Which is a compound used at home in cleaning
household wares?
A. baking soda
B. brown sugar
C. ethyl alcohol
D. soy sauce
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Answer:
1.A because the class of chemical elements are the same
and A for a common reason baking soda has lots of cleaning properties