Which of these is a property of acids?

a-they turn litmus paper blue.

b- they typically contain an -oh group.

c -they taste sour.

d -they feel slippery.

C = They taste sour

Explanation:

The option C is correct. Acids are sour in taste.

All other options are incorrect because,

A = they turn litmus paper blue.

It is the property of base.

B = they typically contain an -OH group.

It is the property of base. Bases give hydroxyl ion.

C = They are sour in taste.

It is the property of acid.

Acids gives H⁺ ions.

D = They feel slippery

It is the property of base. Strong bases are slippery and feel slimy.

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms

the answer is barium and copper bromide