Some Basic Concepts Of Chemistry Question 181
Question: 1.520 g of the hydroxide of a metal on ignition gave 0.995 gm of oxide. The equivalent weight of metal is [DPMT 1984]
Options:
A) 1.520
B) 0.995
C) 19.00
D) 9.00
Show Answer
Answer:
Correct Answer: D
Solution:
$ \frac{wt\text{. of metal hydroxide }}{wt\text{. of metal oxide}}=\frac{EM+EO{H^{-}}}{EM+E{O^{-}}} $ $ =\frac{1.520}{0.995}=\frac{x+17}{x+8} $ $ =1.520x+1.520\times 8 $ $ =0.995x+0.995\times 17 $
$ 1.520x+12.160=0.995x+16.915 $
or $ 0.525x=4.755 $
$ x=\frac{4.755}{0.525}=9 $ .
