Consider the following statements: 1. Biofuels are renewable energy sources. 2. Biodiesel is produced by the transesterification of vegetable oils. Which is/are correct? MCQ with Answer and Explanation

Explanation:
Biofuels like ethanol (from sugarcane), biodiesel (from plant oils), and biogas (from organic waste) are renewable as they can be replenished within a human lifespan. Coal, petroleum, and natural gas are fossil fuels, formed over millions of years, and are non-renewable. Using renewable fuels helps reduce greenhouse gas emissions. Another renewable fuel is hydrogen produced from water electrolysis using solar power.

Explanation:
Antoine Lavoisier is known as the father of modern chemistry and formulated the law of conservation of mass—mass is neither created nor destroyed in a chemical reaction. Dalton's atomic theory supported this law. Thomson discovered electron. Rutherford discovered nucleus. Lavoisier also named oxygen and hydrogen and established the role of oxygen in combustion.

Explanation:
Boyle's law: P₁V₁ = P₂V₂. So P₂ = P₁(V₁/V₂) = P₁(10/20) = P₁/2. Pressure is halved. If volume doubles, pressure halves, assuming constant temperature and amount. This is an inverse relationship.