9 public questions tagged with this topic.
Density increases with molecular weight for similar structures. CH₃CH₂CH₂I (1-iodopropane) has the highest molecular weight.
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Physical Properties - Boiling Point Dipole Moment Solubility
Density increases with molecular weight for similar structures. CH₃I (iodomethane) has the highest density among CH₃X compounds.
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Physical Properties - Boiling Point Dipole Moment Solubility
Density generally increases down group 1 due to increasing atomic mass, with Cs having the highest density among Li, Na, K, and Cs.
Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Genesis of Periodic Classification - Dobereiner Newlands Mendeleev
Moles of HNO₃ = 9.75/63 ≈ 0.1548 mol. Volume = 0.25 L. Molarity = 0.1548/0.25 ≈ 0.619 M.
Ref: NCERT Class 11 Chemistry > Chapter 1: Some Basic Concepts of Chemistry > Topic: Stoichiometry and Stoichiometric Calculations and Limiting Reagent
Moles of NaCl = 4.8/58.5 ≈ 0.0821 mol. Volume = 0.25 L. Molarity = 0.0821/0.25 ≈ 0.328 M.
Ref: NCERT Class 11 Chemistry > Chapter 1: Some Basic Concepts of Chemistry > Topic: Reactions in Solutions and Mass Percentage and Numericals
Moles of urea = 6/60 = 0.1 mol. Volume = 0.3 L. Molarity = 0.1/0.3 ≈ 0.333 M.
Ref: NCERT Class 11 Chemistry > Chapter 1: Some Basic Concepts of Chemistry > Topic: Laws of Chemical Combination - Conservation Mass Definite Multiple
Mass of 1 L solution = 1000 × 1.02 = 1020 g. Mass of H₂SO₄ = 0.5 × 98 = 49 g. Mass of water = 1020 − 49 = 971 g = 0.971 kg. Molality = 0.5 / 0.971 ≈ 0.515 m.
Ref: NCERT Class 11 Chemistry > Chapter 1: Some Basic Concepts of Chemistry > Topic: Laws of Chemical Combination - Conservation Mass Definite Multiple
Mass of 1 L solution = 1000 × 1.25 = 1250 g. Mass of NaCl = 3 × 58.5 = 175.5 g. Mass of water = 1250 − 175.5 = 1074.5 g = 1.0745 kg. Molality = 3 / 1.0745 ≈ 2.79 m.
Ref: NCERT Class 11 Chemistry > Chapter 1: Some Basic Concepts of Chemistry > Topic: Laws of Chemical Combination - Conservation Mass Definite Multiple
55.5M accurately defines or describes the concept asked in this question. Within Water and Mole Concept, precise definitions and terminology are essential for clear scientific communication. The other options (18M, 10M, and 100M) either describe related but distinct concepts, use incorrect terminology, or confuse similar-sounding terms that have different scientific meanings. A thorough understanding of exact definitions helps distinguish between closely related biological concepts and is crucial for competitive examinations.
Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 2
