Question

27) Which of the following process is a physical change?
(A) Iron is magnetized
(B) Iron rusts.
(C) Red hot iron is put in steam.
(D) All of these

28) The element capable of gaining as well as losing an electron is

(A) Hg
(B) Ca
(c) Ag
(d) H​

Answer 1

Answer:

$\Large \underline{ \sf \red{Answer࿐}}$

When iron is magnetised then no new substance is formed. Therefore, it is a physical change.Also, When Iron rusts then it forms a new substance which make the iron red. Now

• When H gains
• Li + H = LiH

Therefore

• Option A
• Option D