'X' and 'Y' are two metallic elements. 'Y' is more reactive than 'X'. The reaction of 'Y' with iron oxide is highly exothermic and is used to join railway tracks. Y does not react with hot or cold water but reacts with steam to form its oxide. 'X' reacts with sodium hydroxide to produce a gas 'Z' which burns with pop sound. 'X' is also a constituent of brass. Which of the following statements are not correct for 'X', 'Y' and 'Z'? (i) 'Y' is aluminium and 'X' is copper. (ii) Oxides of 'X' and 'Y' are amphoteric. (iii) 'Y' forms a compound with formula YCl3 with chlorine. (iv) 'X' is used for galvanisation. (v) 'Z' is oxygen.
Answers
Answer:
Options (i) and (v) are not correct
Explanation:
Y is aluminium and X is Zinc because though copper is a constituent of brass but it does not reacts with sodium hydroxide to release hydrogen gas that burns with a pop sound. So other constituent of brass is zinc and it is used for galvanization process too.
In galvanization process, zinc metal is coated over iron articles mainly to protect them from rusting.
Z is not oxygen gas but it is hydrogen gas because this gas burns with a pop sound.
Oxides of aluminium and zinc are amphoteric as they reacts with both acids and alkalies.
An Aluminium atom has three electrons in its outermost shell and it donates these electrons to three chlorine atoms which have one electron in their outermost shell each and form AlCl3 compound.