Addition of 6 m hcl to which substance will not result in gas evolution? explain why. a) alb) znc) k2co3d) nano3

Option D ()

Explanation:

Acids react with metal to form salt and hydrogen gas.

Metals which are more reactive than hydrogen evolve hydrogen gas on reaction with acid.

For example:

Magnesium reacts with hydrogen chloride to form magnesium chloride and hydrogen.

2HCl(aq) + Mg(s) → MgCl2(aq) + H2(g)

Al and Zn are more reactive than hydrogen, therefore, these metals evolve hydrogen gas on reaction with acid.

reacts with HCl to form NaCl and nitric oxide.

reacts with HCl to form potassium chloride, carbon dioxide and water.

As reaction of   does not evolve any gas, therefore, the correct option is D.

aquifers are bounded above and below by impermeable rock. the driving force of groundwater movement in confined aquifers is pressure, rather than gravity.