S Block Elements Question 207
Question: Potassium is kept in
[CPMT 1976]
Options:
A) Alcohol
B) Water
C) Kerosene
D) Liquid ammonia
Show Answer
Answer:
Correct Answer: C
Solution:
Alkali metals are highly reactive metals. They react with Alcohol - $ 2C_2H_5OH+2K\to 2C_2H_5OK+H_2 $ Water - $ 2K+2H_2O\to 2KOH+H_2 $ Ammonia - $ K+(x+y)NH_3\to \underset{\text{Ammoniated }cation}{\mathop{{{[ K{{(NH_3)} _{x}} ]}^{+}}}}+ $
$ \underset{Ammoniatedelectron}{\mathop{{{[e{{(NH_3)} _{y}}]}^{-}}}} $ But they do not react with kerosene.
BETA
