What do acids have in common Selina

What is a common characteristic of all acids as mentioned in the text?

• They all are corrosive.

• They all contain oxygen.

• They all contain hydrogen.

• They all are strong acids.

Which of the following acids is considered strong and can cause burns even when diluted?

• Acetic acid

• Citric acid

• Hydrochloric acid

• None of the above

According to the pH scale, what does a lower pH value indicate about an acid?

• The acid is weaker.

• The acid is stronger.

• The acid is less corrosive.

• The acid is more diluted.

What does the "corrosive" hazard sign in the image indicate?

• The substance is safe to handle.

• The substance is an irritant.

• The substance can cause severe damage to materials and skin.

• The substance is flammable.

What is the primary difference between sulfuric acid (H2SO4) and hydrochloric acid (HCl) based on their chemical formulas?

• Sulfuric acid contains sulfur, hydrochloric does not.

• Hydrochloric acid contains oxygen, sulfuric does not.

• Sulfuric acid contains chlorine, hydrochloric does not.

• Hydrochloric acid contains sulfur, sulfuric does not.

What is the chemical formula for nitric acid?

• H2SO4

• HCl

• HNO3

• CH4

Which elements are found in nitric acid?

• Hydrogen, Nitrogen, Oxygen

• Hydrogen, Sulfur, Chlorine

• Carbon, Hydrogen, Oxygen

• Nitrogen, Oxygen, Chlorine

If a substance contains oxygen, sulfur, and hydrogen, is it necessarily an acid? Explain your reasoning.

• Yes, because all acids contain hydrogen

• No, because not all substances with these elements are acids

• Yes, because sulfur indicates acidity

• No, because it must also contain chlorine to be an acid