Baking powder is a mixture of sodium bicarbonate (baking soda) and a mild edible acid, usually tartaric acid. When moistened and heated, they react to release CO₂, causing dough to rise. Baking soda alone requires an external acidic ingredient. The acid ensures complete reaction and avoids a bitter taste.
Explanation:
An electrolyte is a substance that produces ions when dissolved in water or melted, allowing the solution to conduct electricity. Aqueous NaCl dissociates into Na⁺ and Cl⁻ ions. Distilled water, sugar, and ethanol do not form ions in solution and are therefore non-electrolytes.
Explanation:
Methane (CH₄) is the primary component of both natural gas (about 70-90%) and biogas (about 50-75%). It is the simplest alkane and a clean-burning fossil fuel. Ethane, propane, and butane are present in smaller amounts in natural gas but are not the main constituent.
Explanation:
Use Charles' law: V₁/T₁ = V₂/T₂. T in Kelvin: T₁ = 27+273 = 300 K, T₂ = 327+273 = 600 K. V₂/V₁ = T₂/T₁ = 600/300 = 2. Volume doubles. The ratio is 2:1. Note that 27 to 327 is a 300°C increase, but absolute temperature doubles.
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