Which is a characteristic property of acids? a. they turn blue litmus paper red. b. they turn red litmus paper blue. c. they taste bitter. d. they do not react with metals.

The correct answer is Option a.

Explanation:

Acid is defined as the chemical species which donates hydrogen ions in the solution.

Properties shown by acid:

Base is defined as the chemical species which donates hydroxide ions in the solution.

Properties shown by base:

Hence, the correct answer is Option a.

fe 55.85 g/mol and h2o 18.02 g/mol.

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.