UPSSSC PET 2025 (6 Sept Shift 2)
Why is burning of natural gas classified as an exothermic reaction ?
Answer (Detailed Solution Below)View answer ▾Hide ▴
Answer: Option B — Because heat is produced in this reaction
Detailed Solution
Burning natural gas (methane) releases heat: + heat. Reactions that give out heat are exothermic.
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Chemical Reactions & Bonding — UPSSSC PET Preparation
This question tests your understanding of Chemical Reactions & Bonding, a key topic in the UPSSSC PET General Knowledge section. The detailed solution above uses a step-by-step approach to show the reasoning, and where available, a shortcut that helps you solve similar questions in under 90 seconds during the actual exam.
This topic covers chemical bonding (ionic, covalent and metallic bonds), types of chemical reactions (combination, decomposition, displacement, double displacement, oxidation and reduction, and redox), catalysts, the rate of reactions, and everyday examples such as corrosion and rancidity. Exams ask which type of reaction an example shows, what a catalyst does (it changes the rate of a reaction without being used up), and how corrosion and rancidity can be prevented. Remember that oxidation is the gain of oxygen or loss of electrons, reduction is the opposite, and a redox reaction involves both at the same time. Practise the chemical reactions and bonding questions below, written in the style of the general awareness sections of exams such as SSC, banking, railways, CUET GAT, MAH CET and CLAT. Each question comes with a detailed explanation that adds related facts, so every question helps you revise more than one point.