When a drain cleaner is mixed with water and the solution becomes warm is that a chemical reaction or no chemical reaction

Afamily is one another name for a group on the table of elements.

Δu of , in kj/kg, as it isto k, (a)as a of , (b) at , (c) at .

Which one of the following is an oxidation-reduction reaction? naoh + hno3 --> h2o + kno3 naoh + hno3 --> h2o + kno3 so3 + h2o --> h2so4 cacl2 + na2co3 --> caco3 + 2 nacl ch4 + 2 o2 --> co2 + 2 h2o al2(so4)3 + 6 koh --> 2 al(oh)3 + 3 k2so4