Are there options for answers
Answer:
Advantages
<u>Readily available at the moment </u>
<u>Relatively easy to produce energy from them</u>
Disadvantages
<u>Non-renewable source will eventually run out</u>
<u>Increasing fuel costs</u>
<u>Release carbon dioxide (CO 2 ) when burnt - greenhouse gas</u>
<u></u>
"The ability of a base to react with a soluble metal salt" demonstrates characteristic of a base.
<u>Answer:</u> Option D
<u>Explanation:</u>
As the sodium hydroxide react with only with some metals. It is a very strong basic compound with a intense solubility in water and hygroscopic in nature. The ability of base is reflected from its potential to react with metals. In the given reaction:

is an acidic property showing salt which is added with sodium hydroxide and this reaction result into a pale blue precipitate of basic copper hydroxide & sodium sulphate which is neutral salt. The reaction is a double displacement and precipitation reaction.