Question

Metal + Acid > Metal Salt + Gas Which of following options are correct with the above reaction? (1) The gas produced turns lime water milky (ii) The gas produced burns with a pop sound The gas produced gets oxidised to water if the acid is nitric acid (iv) The gas produced supports combustion A.() and (ii) B.(ii) and (iii) C. (ii) and (iv) D) and (iv​

Answer 1

Some of the metals react with dilute acid, forming metal salt and hydrogen, while a few do not react with dilute acids.

Hydrogen gas is not evolved when a metal reacts with nitric acid. It is because HHNO3 is a strong oxidizing agent. It oxidises the HH2 produced to water and itself gets reduced to any of the nitrogen oxides (N2O, NO, NO2 ).