1. Which of the following represents
combination of two compounds forming
another compound?
Option A 2502 + 02 - 2502
Option B CaCO3
Cao + CO2
Option C H2O + S02 - H2SO3
Option D 2Na + 2H20 - 2NaOH
+H2
Answers
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Answer:
option D 2Na + 2H2O - 2NaOH + H2
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