Name two metals which will displace hydrogen from dilute acids, and two metals which will not.

The element that does not displace hydrogen from dilute acids is

Metals displaces hydrogen gas from dilute acids. This is an example for

Name one non-metal which is quite hard.

The metal that cannot displace hydrogen from dilute hydrochloric acid is

Name the non-metal which is liquid.

How do metal displaces hydrogen from acids? Explain with an activity.

Assertion (A) : The element zinc has displaced hydrogen from hydrochloric acid. Reason (R) : Generally metals which are less active than hydrogen displaces it from an acid.

Name two metals which corrode easily and two metals which do not corrode readily.