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Built around the concept in “Which gas is used for respiration in fish?”, this bilingual General Science item checks whether a learner can connect a scientific term with its exact property, mechanism or function. The verified answer is Oxygen.
Option C, Oxygen, matches the evidence in the stem. Fish use dissolved oxygen. The alternatives Nitrogen, Hydrogen and CO2 are legitimate scientific terms, but each belongs to a different function, property, material or context. This builds reliable recall for SSC, Railway, State exams and other General Science tests while preserving conceptual understanding.
FAQ
Common questions and clear answers for this topic.
Oxygen. Fish use dissolved oxygen.
Use the defining property and mechanism from chemistry.
Nitrogen, Hydrogen, CO2 belong to different functions, properties or contexts.
Connect “Which gas is used for respiration in fish?” with Oxygen and the supporting mechanism.
General Science covers basic concepts in Physics, Chemistry, Biology, and Earth Science. It is an important section in competitive exams like SSC CGL, UPSC Prelims, Railway NTPC, and Defence exams. Questions include scientific laws, inventions, human body systems, chemical reactions, and everyday science phenomena. NCERT Science books from Class 6 to 10 are recommended.
Newton's Three Laws of Motion: 1) First Law (Law of Inertia) - An object remains at rest or in uniform motion unless acted upon by an external force. 2) Second Law - Force equals mass times acceleration (F=ma). 3) Third Law - For every action there is an equal and opposite reaction. These laws are fundamental to Physics and frequently asked in SSC CGL, Railway, and NDA exams.
