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



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