MDCAT Preparation MCQs
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Answer: A neutron is a neutral subatomic particle found in the nucleus with no electric charge.
Answer: NaCl is formed by the transfer of an electron from Na to Cl, creating an ionic bond.
Answer: The law of conservation of mass states that total mass remains constant during a chemical reaction.
Answer: Al2O3 reacts with both acids and bases, which is the defining property of an amphoteric oxide.
Answer: Starch is a polysaccharide composed of long chains of glucose units linked by glycosidic bonds.
Answer: Fluorine is the most electronegative element on the Pauling scale with a value of 3.98.
Answer: Avogadro\'s number is 6.022 x 10^23, representing the number of particles in one mole.
Answer: Litmus paper turns red in acidic solutions due to the presence of excess H+ ions.
Answer: Mitochondria produce ATP through cellular respiration, the cell\'s main energy currency.
Answer: Aldehydes contain the -CHO (formyl) functional group bonded to at least one hydrogen.
Answer: Glucose is a hexose sugar with the molecular formula C6H12O6.
Answer: The hypothalamus acts as the body\'s thermostat, regulating temperature and homeostasis.
Answer: Aluminium is extracted from molten alumina by electrolysis in the Hall-Heroult process.
Answer: Commensalism is a symbiotic relationship where one organism benefits and the other is unaffected.
Answer: Carbon in methane forms four equivalent sigma bonds using sp3 hybridization.
Answer: During anaerobic respiration, pyruvate is converted to lactic acid in muscle cells.
Answer: Zinc displaces hydrogen from HCl, producing zinc chloride and hydrogen gas.
Answer: Dividing all subscripts in C6H12O6 by the greatest common divisor 6 gives CH2O.
Answer: Carbon has atomic number 6, meaning it has 6 protons in its nucleus.
Answer: Dissolving ammonium nitrate in water absorbs heat from surroundings, making it endothermic.