Some Basic Concepts of Chemistry — Practice Quiz
Maharashtra Board · Class 11 · Chemistry
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Quick Quiz: Some Basic Concepts of Chemistry
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Which of the following is a pure substance?
According to the Law of Conservation of Mass, what happens during a chemical reaction?
What is the SI base unit for amount of substance?
Calculate the molecular mass of water (H₂O). (Given: H = 1u, O = 16u)
Sample Questions
Which of the following are characteristics of metals? (Select all correct answers)
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Have lustre, Good conductors of heat and electricity, Malleable and ductile
Metals typically have lustre (shiny appearance), conduct heat and electricity well, and can be hammered into sheets (malleable) or drawn into wires (ductile). They are not brittle.
Which of the following statements about Avogadro's law are correct? (Select all correct answers)
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Equal volumes of gases at same T and P contain equal molecules, It helps explain Gay-Lussac's law
Avogadro's law states equal volumes of gases at same temperature and pressure contain equal number of molecules. It applies to all gases and helps explain volume relationships in reactions.
What is Avogadro's constant?
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6.022 × 10²³ mol⁻¹
Avogadro's constant (Nₐ) is 6.022 × 10²³ mol⁻¹, representing the number of particles in one mole of any substance.
Which scale is used as the standard for atomic mass?
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Carbon-12
Carbon-12 is the standard for atomic mass. One atomic mass unit (u) is defined as 1/12 of the mass of one carbon-12 atom.
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