Question

a reaction of direct combination i.e. synthesis in which two gases combine to give another gas which turns limewater milky​

Answer 1

Answer:

Ca(OH)2(aq) + SO2(g) = CaSO3(s) + H2O(l)

Explanation:

Carbon dioxide (CO2) turns lime water milky due to the formation of insoluble calcium carbonate, CaCO3.

Answer 2

Answer:

2CO+O2 -----> 2CO2

Explanation:

According to question reactants should be gases and CO and O2 are gases and Product turns lime water milky and even carbon-di-oxide does the same.