Question

a) Which of the following statements is incorrect about acids?
i) acids are sour in taste
ii) acids are soapy to touch
iii) blue litmus turns red in acid
iv) strong acids are harmful for the skin​

Answer 1

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ii) acids are soapy to touch

This statement is incorrect about acids, beacuse bases are soapy to touch, not acids.

iv) Strong acids are harmful to ou skin

Strong acids are not harmful, but weak acids are harmful. Such as Hydrochloric acid.

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Answer 2

The incorrect statement about the acids is ACIDS ARE SOAPY TO TOUCH. (OPTION II)

ACIDS -

• The substances that have the ability to donate protons in water.
• The aqueous solution conducts electricity due to the presence of free electrons in the solution.
• Acids are sour in taste and are harmful to the skin.
• Acids change the color of the acid-base indicators such as it changes blue litmus paper to red.
• Acids react with bases to form salts and water molecules.
• Acids react with the metal to form hydrogen gas.
• For example,   $Zn + H_2SO_4$ → $ZnSO_4 + H_2$↑