General Science Questions and Answers – Page 9

The concept tested here leads specifically to Hygrometer. A hygrometer is used to measure humidity of air. The property stated in the stem should be connected to the correct material, process, instrument or scientific principle. In “Which instrument is used to measure humidity of air?”, the decisive clue should be interpreted through the underlying mechanism, not through a familiar-sounding word. The alternatives Lactometer, Barometer and Ammeter are legitimate scientific terms, but each belongs to a different function, property, material or context. For revision, connect the stem with Hygrometer and with the explanatory fact above.

Option A, Alveoli, matches the evidence in the stem. Gas exchange occurs across the thin walls of alveoli in the lungs. Similar organs and biomolecules may participate in the same body system but do not perform identical functions. In “Which part of the respiratory system is the site of exchange of gases in humans?”, the decisive clue should be interpreted through the underlying mechanism, not through a familiar-sounding word. The alternatives Larynx, Bronchi and Trachea are legitimate scientific terms, but each belongs to a different function, property, material or context. A useful verification is to state the definition in one sentence and ask whether the selected option satisfies every part of it. For revision, connect the stem with Alveoli and with the explanatory fact above.

The defining scientific property identifies Hydrogen. Hydrogen is only slightly soluble in water, so it can be collected over water. In “Which gas is collected over water because it is only slightly soluble in water?”, the decisive clue should be interpreted through the underlying mechanism, not through a familiar-sounding word. The alternatives Hydrogen chloride, Sulfur dioxide and Ammonia are legitimate scientific terms, but each belongs to a different function, property, material or context. For revision, connect the stem with Hydrogen and with the explanatory fact above.

Carbohydrates is the scientifically supported answer. Carbohydrates are the primary source of energy in the human diet. Biological questions are best solved by connecting a structure or nutrient with its physiological role, location and consequence of deficiency or malfunction. In “Which nutrient is the chief source of energy in the human diet?”, the decisive clue should be interpreted through the underlying mechanism, not through a familiar-sounding word. The alternatives Proteins, Vitamins and Minerals are legitimate scientific terms, but each belongs to a different function, property, material or context. If the topic involves the human body, check organ and function; in chemistry, check composition and reaction; in physics, check quantity and unit; and in environmental science, check layer and process. For revision, connect the stem with Carbohydrates and with the explanatory fact above.

The concept tested here leads specifically to Newton's third law. Newton's third law states that every action has an equal and opposite reaction. Chemical identity depends on composition, characteristic properties and reaction behaviour. In “Which law explains that every action has an equal and opposite reaction?”, the decisive clue should be interpreted through the underlying mechanism, not through a familiar-sounding word. The alternatives Law of gravitation, Newton's first law and Newton's second law are legitimate scientific terms, but each belongs to a different function, property, material or context. A useful verification is to state the definition in one sentence and ask whether the selected option satisfies every part of it. If the topic involves the human body, check organ and function; in chemistry, check composition and reaction; in physics, check quantity and unit; and in environmental science, check layer and process. For revision, connect the stem with Newton's third law and with the explanatory fact above. This builds reliable recall for SSC, Railway, State exams and other General Science tests while preserving conceptual understanding.

Option C, Neuron, matches the evidence in the stem. Neuron is the structural and functional unit of the nervous system. Physics requires attention to the measured quantity, governing principle and unit. In “The functional unit of the nervous system is:”, the decisive clue should be interpreted through the underlying mechanism, not through a familiar-sounding word. The alternatives Alveolus, Axon and Nephron are legitimate scientific terms, but each belongs to a different function, property, material or context. If the topic involves the human body, check organ and function; in chemistry, check composition and reaction; in physics, check quantity and unit; and in environmental science, check layer and process. For revision, connect the stem with Neuron and with the explanatory fact above.

The defining scientific property identifies Zinc. Galvanization is the process of coating iron with zinc to prevent rusting. In “Which metal is used for galvanizing iron to protect it from rusting?”, the decisive clue should be interpreted through the underlying mechanism, not through a familiar-sounding word. The alternatives Tin, Lead and Copper are legitimate scientific terms, but each belongs to a different function, property, material or context. For revision, connect the stem with Zinc and with the explanatory fact above. This builds reliable recall for SSC, Railway, State exams and other General Science tests while preserving conceptual understanding.

Transpiration is the scientifically supported answer. Transpiration is the loss of water vapour from aerial parts of plants, mainly through stomata. In “Which process in plants is responsible for the loss of water in the form of vapour?”, the decisive clue should be interpreted through the underlying mechanism, not through a familiar-sounding word. The alternatives Respiration, Photosynthesis and Absorption are legitimate scientific terms, but each belongs to a different function, property, material or context. If the topic involves the human body, check organ and function; in chemistry, check composition and reaction; in physics, check quantity and unit; and in environmental science, check layer and process. For revision, connect the stem with Transpiration and with the explanatory fact above. This builds reliable recall for SSC, Railway, State exams and other General Science tests while preserving conceptual understanding.

The concept tested here leads specifically to Cochlea. The cochlea contains the organ of Corti, the receptor for hearing. In “Which part of the ear contains the organ of hearing?”, the decisive clue should be interpreted through the underlying mechanism, not through a familiar-sounding word. The alternatives Pinna, Semicircular canals and Eardrum are legitimate scientific terms, but each belongs to a different function, property, material or context. A useful verification is to state the definition in one sentence and ask whether the selected option satisfies every part of it. If the topic involves the human body, check organ and function; in chemistry, check composition and reaction; in physics, check quantity and unit; and in environmental science, check layer and process. For revision, connect the stem with Cochlea and with the explanatory fact above.

Option D, Chlorofluorocarbons, matches the evidence in the stem. CFCs release chlorine radicals that destroy ozone molecules in the stratosphere. In “Which gas is mainly responsible for depletion of the ozone layer?”, the decisive clue should be interpreted through the underlying mechanism, not through a familiar-sounding word. The alternatives Hydrogen, Nitrogen and Methane are legitimate scientific terms, but each belongs to a different function, property, material or context. If the topic involves the human body, check organ and function; in chemistry, check composition and reaction; in physics, check quantity and unit; and in environmental science, check layer and process. For revision, connect the stem with Chlorofluorocarbons and with the explanatory fact above. This builds reliable recall for SSC, Railway, State exams and other General Science tests while preserving conceptual understanding.