7.when you combine a base gases two hydrogen atoms and one di-atomic oxygen what will be the outcome


A. it will be still be in gaseous state
B. it will form in liquid state
C. it will be in solid state
D. all of the above



8. what will happen to a blue litmus paper when put in acid substance?

A. it will turn into red
B. it will turn into blue
C. it will torn into purple
D. nothing will happen


9. an ion present in acidic substance.

A. hydroxide ion
B. hydrogen ion
C. sodium ion
D. potassium ion
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