Very Short Question and Answers - Understanding Acids and Bases

Acids are sour in taste and change the color of blue litmus paper to red.

Red litmus paper turns blue when dipped in a basic solution.

The reaction between an acid and a metal produces a salt and hydrogen gas.

Phenolphthalein turns pink in a basic solution.

Sodium chloride, water, and carbon dioxide are produced when sodium carbonate reacts with hydrochloric acid.

The litmus solution remains purple in a neutral solution.

Turmeric turns reddish-brown in acidic solutions.

Diluting an acid generally increases its pH, making it less acidic.

The reaction generally produces a salt and water, demonstrating that non-metallic oxides are acidic.

The reaction produces NaCl (salt) and water.

An olfactory indicator is a substance that changes its smell in acidic or basic media.

Hydrogen gas can be tested by holding a burning candle near the gas; if it ignites with a 'pop' sound, hydrogen is present.

The solution becomes blue-green due to the formation of copper(II) chloride.

Litmus, turmeric, phenolphthalein, and methyl orange are indicators used to test the nature of substances.

Carbon dioxide is usually evolved when an acid reacts with a carbonate.

A non-metallic oxide reacts with a base to form a salt and water.

Carbon dioxide can be tested by passing it through lime water, which turns milky.

Clove oil's odor changes when it reacts with an acidic solution, indicating acidity.

The pink color disappears when an acid is added to phenolphthalein.

Curd and sour substances react with metals, which can be harmful and alter the taste.