Which of the following is an acidic oxide?
a. ) NO2
b. ) H2O
c. ) K2O
d. ) NaCl
e. ) Ca(OH)2
At least two of these can't possibly be an acidic oxide. Check this site to see which of the remaining three is.
http://en.wikipedia.org/wiki/Acidic_oxide
To determine which of the following is an acidic oxide, we need to understand what an acidic oxide is. An acidic oxide is an oxide that reacts with water to form an acid.
Let's analyze each option:
a. NO2: This is nitrogen dioxide, which is a reddish-brown gas. When it reacts with water, it forms nitric acid (HNO3). Therefore, NO2 is an acidic oxide.
b. H2O: This is water, and it does not react with itself to form an acid. Therefore, it is not an acidic oxide.
c. K2O: This is potassium oxide. When it reacts with water, it forms potassium hydroxide (KOH), which is a base, not an acid. Therefore, K2O is not an acidic oxide.
d. NaCl: This is sodium chloride, commonly known as table salt. It does not react with water to form an acid. Therefore, it is not an acidic oxide.
e. Ca(OH)2: This is calcium hydroxide, which is a base. It does not react with water to form an acid. Therefore, it is not an acidic oxide.
From the options provided, the only oxide that reacts with water to form an acid is NO2 (option a). Therefore, the correct answer is a. NO2.