Question

Substance x reacts with dilute hcl violently, y reacts slowly while z does not react at all. x, y, and z could be respectively a ) cu, al, fe
b ) al, na, cu
c ) na, cu, fe
d ) k, al, cu

Answer 1

Answer:

Correct answer is option D.

Hope this helps

Answer 2

The correct option is d.

• Potassium is an alkali metal. It is a highly reactive metal. It reacts violently with hydrochloric acid. Thus x is K.
• Aluminium is an alkaline earth metal. It is less reactive than K. It reacts slowly with dilute HCl. Thus y is Al.
• Cu is a transition metal. It is very less reactive and doesn't react with dilute hydrochloric acid. Thus z is Cu.
• x, y, z are K, Al and Cu.