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Chemistry questions and answers

Browse questions about Chemistry, with answers and explanations.

423 questions

Acids, Bases and Salts54 questionsChemical Bonding10 questionsChemical Kinetics4 questionsChemical Reactions2 questionsChemical Reactions and Equations16 questionsChemistry in Everyday Life24 questionsCombustion and Flame12 questionsCoordination Compounds2 questionsElectrochemistry5 questionsEnvironmental Chemistry7 questionsMetallurgy13 questionsMetals and Non-metals3 questionsMetals, Non-metals and Alloys22 questionsOrganic Chemistry94 questionsPeriodic Table58 questionsPolymers3 questionsSolutions15 questionsSome Basic Concepts of Chemistry7 questionsStates of Matter22 questionsStructure of Atom48 questionsSurface Chemistry2 questions

Questions

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Assertion (A): The space-filling model emphasizes the relative size of each atom based on its van der Waals radius. Reason (R): The van der…

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Consider the following statements: 1. The Gold Foil Model was developed by J.J. Thomson in 1898. 2. The Plum Pudding Model describes electrons embedded…

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Consider the following statements. 1. One mole contains exactly 6.02214076×10²³ specified elementary entities. 2. Planck’s constant relates the energy of a photon to its…

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Assertion (A): A neutral sodium atom in its ground state has the shell configuration 2,8,1. Reason (R): A neutral sodium atom has 11 electrons,…

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Which set of quantum numbers is allowed for an electron in a 4f orbital?

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Identify the correct statement about first ionisation enthalpy. Statement A: It is the molar energy required to remove the most loosely bound electron from…

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Consider the following statements: 1. London dispersion forces are a type of Van der Waals force found in halogens, noble gases, and other non-polar…

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Consider the following statements: 1. An electron has a negative charge, a proton has a positive charge, and a neutron is electrically neutral. 2.…

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Which of the following statements are included in Dalton’s atomic theory? I. Matter consists of extremely small particles known as atoms that take part…

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Using the rounded atomic masses H = 1 and O = 16, what is the mass ratio of hydrogen to oxygen in water (H₂O)?

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Rutherford’s atomic model failed mainly because it could not account for:

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In the Bohr model of a hydrogen-like atom, how does the energy gap between consecutive levels change as the principal quantum number n increases?

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According to Bohr's model, what is the significance of an electron transition from a higher energy orbit to a lower energy orbit?

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