Which of the following is a property of acid solutions

a. sour taste

b. More than one response is correct.

c. slippery feel

d. change red litmus to blue

Cl2+, Br2-, Cl, Cl+, Cl-, Br

The Correct Answer and Explanation is :

Answer: (b) More than one response is correct.

Explanation:
Acids exhibit several characteristic properties, including:

Sour taste (Option a): Acids like citric acid (in lemons) or acetic acid (in vinegar) have a distinctly sour taste.
Changing blue litmus red, not red to blue (Option d is incorrect).
Slippery feel (Option c is incorrect): This is a property of bases, not acids. Bases feel slippery due to their reaction with skin oils to form soap-like substances.

Since option (a) is correct but not the only correct response, the best choice is (b) More than one response is correct.

Given atoms/ions: Cl²⁺, Br²⁻, Cl, Cl⁺, Cl⁻, Br
Increasing size order:
[
Cl²⁺ < Cl⁺ < Cl < Br < Cl⁻ < Br²⁻
]

Explanation:
The size of an atom or ion is influenced by three main factors:

Nuclear Charge (Z) – More protons pull electrons closer, reducing size.
Electron Repulsions – More electrons or negative charge increases size.
Energy Level (n) – Higher periods (down the periodic table) have larger orbitals.

Cl²⁺ (smallest): A highly positive ion loses two electrons, leading to strong nuclear attraction and a very small radius.
Cl⁺: Losing one electron still reduces repulsion, making it smaller than neutral Cl.
Cl (Neutral): Standard atomic size for chlorine.
Br (Neutral): Bromine is below chlorine on the periodic table (Period 4 vs. Period 3), so it has a larger atomic radius.
Cl⁻: Gaining an electron increases repulsion, expanding the atomic size.
Br²⁻ (largest): Gaining two electrons greatly increases electron-electron repulsion, making it the largest in this set.

Thus, the order is:
[
Cl²⁺ < Cl⁺ < Cl < Br < Cl⁻ < Br²⁻
]

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