Predicting the Products of Chemical Reactions

Which of the following is a possible product of a reaction between Hydrogen (H) and Oxygen (O)?

Which of the following is a possible product of a reaction between Carbon (C) and Oxygen (O)?

Which of the following is a possible product of a reaction between Iron(Fe) and Oxygen (O)?

Which of the following is a possible product of a reaction between Hydrogen (H) & Florine (F)?

Which of the following are possible products for a reaction that contains the reactants listed here? Select all that apply: $$2HCl\ +F_2$$  

Which of the following are NOT possible products for a reaction that contains the reactants listed here? Select all that apply: $$2HCl\ +F_2$$  

Which of the following are possible products for a reaction between the reactants listed here? Select all that apply. $$2HCl\ +CaCO_3$$  

Which of the following are NOT possible products for a reaction between the reactants listed here? Select all that apply. $$2HCl\ +CaCO_3$$  

True or False: This chemical equation is written correctly $$Na\ +\ Cl_2\ \rightarrow\ NaCl$$  

True or False: This chemical equation is written correctly $$2Na\ +\ Cl_2\ \rightarrow\ 2NaCl$$