Which reaction is an example of heterogeneous catalysis? ethene gas reacts with hydrogen gas by using a nickel catalyst. hydrogen peroxide decomposes by using an aqueous iodide ion catalyst. formic acid decomposes by using an acidic catalyst. sulfur dioxide gas is converted to sulfur trioxide gas by using nitrogen chloride gas.

 The reaction  which is an example of heterogenous  catalysis is

Ethene  gas  reacts  with  hydrogen  gas  using  a nickel  catalyst

 Explanation.

 Heterogenous  catalysis-  is the form of catalysis in which the phase  of  catalyst   differ from that of reactant.

 In the reaction of ethene gas + hydrogen  gas  using  a nickel catalyst  is an example  of heterogenous  catalysis since  ethene and  hydrogen are  in different phase with Nickel.

 Ethene  and hydrogen is in gaseous  state while  nickel  is in solid  state.

In heterogeneous catalysis the phase of the catalyst is different from the phase of the reactant.

The correct answer is "Ethene gas reacts with hydrogen gas by using a nickel catalyst." Here the reactant ethene and hydrogen are in gas phase whereas the nickel catalyst is in a solid phase.

Formic acid decomposes by using an acidic catalyst. Here both the reactant and the catalyst are in liquid phase.

Hydrogen peroxide decomposes by using an aqueous iodide ion catalyst. Here both the reactant and the catalyst are in liquid phase.

Sulfur dioxide gas is converted to sulfur trioxide gas by using nitrogen chloride gas. Here both catalyst and reactant are in the same phase that is gas phase.

answer: mercury

explanation:

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.