A. CaO B. Ca(HCO3)2 C. H2CO3 D. CaCO3 Correct Answer: Option B B. Ca(HCO3)2
A. heavier than air B. insoluble in water C. lighter than air D. soluble in water Correct Answer: Option C…
A. is a supersaturated solution B. cannot dissolve more of the solute at that temperature C. contains any amount of…
A. mass number B. oxidation number C. atomic number D. Avogadro number Correct Answer: Option D D. Avogadro number
A. 2,5 and 2 B. 2,2 and 5 C. 5, 1 and 2 D. 1, 5 and 2 Correct Answer:…
A. 11.2dm³ B. 17.0 dm³ C. 34.0dm³ D. 44.8dm³ Correct Answer: Option A A. 11.2dm³
A. A more electropositive element displaces a less electropositive one B. A less electropositive element displaces a more electropositive one…
A. atoms B. neutrons C. the negative ions D. positively charged nuclei Correct Answer: Option D D. positively charged nuclei
A. a covalent compound, AY is formed B. an ionic compound AY is formed C. an ionic compound, A2Y is…
A. covalent B. dative C. ionic D. metalic Correct Answer: Option B B. dative