A silvery-white metal X taken in the form of ribbon when ignited, burr’ n air with a dazzling white flame to form a white powder Y. When water is added to powdei; Y, it dissolves partially to form another substance Z.
A. What could metal X be ?
B. What is powder Y ?
C. With which substance metal X combines to form powder Y ?
D. What is substance Z ? Name one domestic use of substance Z. [3]
Answer:A
A silvery-white metal X taken in the form of ribbon when ignited, burr’ n air with a dazzling white flame to form a white powder Y. When water is added to powdei; Y, it dissolves partially to form another substance Z.
A. What could metal X be ? B. What is powder Y ? C. With which substance metal X combines to form powder Y ? D. What is substance Z ? Name one domestic use of substance Z. [3]