A silver oxide cell is a non-rechargeable primary cell, whereas the other options are rechargeable batteries.

Coke is a pure form of carbon, obtained by heating coal in the absence of air. It is a byproduct of coal refining and is used as a fuel and in the production of steel.

n-heptane has a low octane rating, making it more susceptible to engine knocking or pinging, which can damage the engine over time.

Tetraethyl lead is a known contaminant. Historically, it was used as an octane booster in gasoline to improve engine performance and fuel efficiency. However, due to its toxicity, its use has been phased out in many countries in favor of safer alternatives.

Laptops require rechargeable batteries. Nickel cadmium cells are rechargeable and were used in older laptops. They have a suitable energy density, making them a viable option.

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Alum is a classic example of a double salt. It is formed by the combination of two different salts, such as potassium sulfate and aluminum sulfate, which crystallize together in a specific stoichiometric ratio to form a single crystalline structure.

In solvent extraction, ether is employed to isolate organic compounds from a mixture. The process involves dissolving the compounds in an immiscible solvent, like ether, and separating the two liquids. In this context, ether is used to separate products of organic synthesis from water, as water is commonly used as the reacting medium in organic chemistry reactions.

Pyrolysis is a chemical reaction that involves the breakdown of larger molecules into smaller ones, often in the presence of heat, resulting in the formation of simpler compounds. This process is commonly used to analyze the composition of complex materials and can be applied in various fields such as chemistry and materials science.

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