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Atoms and Molecules
General Studies
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Atoms and Molecules

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Q1Which of the following statements regarding Dalton’s Atomic Theory is/are correct? 1. Atoms of the same element are identical in all respects. 2. Atoms cannot be created or destroyed in a chemical reaction. 3. Atoms of different elements combine in a fixed, simple ratio to form compounds.MediumSolve →Q2Which of the following represents the correct SI unit for amount of substance?MediumSolve →Q3The term ‘Atomic Mass Unit (amu)’ is defined based on which isotope?MediumSolve →Q4Consider the following statements: 1. Avogadro’s hypothesis explains the relationship between volume and number of molecules. 2. One mole of any gas occupies 22.4 litres at STP. Which is/are correct?MediumSolve →Q5A sample contains 6.022 x 10²³ molecules of CO₂. Its mass is:MediumSolve →Q6Who experimentally determined the charge of an electron?MediumSolve →Q7Which statement correctly describes isotopes?MediumSolve →Q8Statement: Gram molecular weight and molar mass are numerically the same but differ in units. Is this correct?MediumSolve →Q9Which of the following has the highest number of atoms?MediumSolve →Q10A compound X contains 40% C, 6.7% H, and 53.3% O. Its empirical formula is:MediumSolve →

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