Measurement of Matter — Important Questions
Maharashtra Board · Class 9 · Science
42 important questions from Measurement of Matter for Maharashtra Board Class 9 Science, with answers. Includes multiple choice and multiple correct.
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Important Questions from Measurement of Matter
Which of the following are basic radicals?
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Na⁺, Ca²⁺, NH₄⁺
Basic radicals are positively charged ions (cations). Na⁺, Ca²⁺, and NH₄⁺ are all positively charged, while Cl⁻, SO₄²⁻, and OH⁻ are negatively charged acidic radicals.
Which scientist is known as the father of modern chemistry?
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Antoine Lavoisier
Antoine Lavoisier is known as the father of modern chemistry. He discovered the law of conservation of mass and made significant contributions to chemical nomenclature.
Which of the following represent compounds?
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H₂O, NaCl, CO₂
Compounds are formed by chemical combination of different elements. H₂O, NaCl, and CO₂ contain different elements, while O₂ and N₂ are molecules of the same element.
How many grams make one mole of carbon dioxide (CO₂)? (Given: C = 12u, O = 16u)
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44 g
Molecular mass of CO₂ = 12 + (2 × 16) = 12 + 32 = 44 u. One mole of any substance has mass in grams equal to its molecular mass in u.
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