Question Text
Question 4 :
Electrolysis is used in the extraction of metals from their ores.
Question 5 :
Assertion: Zinc is used in the galvanization of iron.
Reason: Its coating on iron articles increases their life by protecting them from rusting.
Question 8 :
In a solution of lead acetate, a strip of metal Z was dipped. After some time, lead from the solution was deposited at the metal strip. Which is more reactive?
Question 9 :
Reaction of hydrochloric acid with zinc oxide to form zinc chloride and water is a neutralization reaction.
Question 11 :
Assertion: Ionic bonds are directional in nature whereas covalent bonds are non-directional.
Reason: According to orbital overlap concept, the formation of a covalent bond between two atoms results by pairing of electrons present in the valence shell having same spins.
Question 14 :
Assertion: Ionic bonds are always stronger than covalent bonds.Reason: They break only when bombarded with electrons.
