Some Basic Concepts Of Chemistry Question 219
Question: If $ 1\frac{1}{2} $ moles of oxygen combine with Al to form $ Al _2O _3 $ the weight of Al used in the reaction is (Al=27) [EAMCET 1980]
Options:
A) 27 g
B) 54 g
C) 49.5 g
D) 31 g
Show Answer
Answer:
Correct Answer: B
Solution:
$ 2Al+\frac{3}{2}O _2\to Al _2O _3 $
According to equation $ \frac{3}{2} $ mole of $ O _2 $ combines with 2 mole Al. 2 mole Al = 54gm
