Which of the following is used as the electrolyte in a lead-acid storage battery?
A. Phosphoric acid
B. Sulphuric acid
C. Nitric acid
D. Hydrochloric acid
Answer: Option B
Solution (By JKSSB Mock Tests)
A lead-acid battery, commonly used in automobiles, consists of lead anodes and lead dioxide cathodes. The electrolyte used is an aqueous solution of sulfuric acid (H2SO4). During discharge, the acid is consumed to form lead sulfate and water, decreasing the density of the electrolyte.
Explanation:
Electron affinity is the energy change when an electron is added to a neutral gaseous atom. It represents the tendency to gain electrons. Ionization energy is the energy to remove an electron. Electropositivity and metallic character relate to the tendency to lose electrons and form positive ions.
Explanation:
The diagonal relationship occurs when elements in the second period resemble elements in the third period of the next group due to similar ionic sizes and charge-to-radius ratios (polarizing power). Li-Mg, Be-Al, and B-Si are all classic examples of this phenomenon.
Explanation:
Glass is an amorphous (non-crystalline) solid; it lacks a long-range ordered structure. It is sometimes called a supercooled liquid. It softens over a temperature range rather than having a sharp melting point. Quartz (SiOâ‚‚) is crystalline.
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