Chapters
Chapter 2: Work and Energy
Chapter 3: Current Electricity
Chapter 4: Measurement of Matter
Chapter 5: Acids, Bases and Salts
Chapter 6: Classification of Plants
Chapter 7: Energy Flow in an Ecosystem
Chapter 8: Useful and Harmful Microbes
Chapter 9: Environmental Management
Chapter 10: Information Communication Technology (ICT)
Chapter 11: Reflection of Light
Chapter 12: Study of Sound
Chapter 13: Carbon : An important element
Chapter 14: Substances in Common Use
Chapter 15: Life Processes in Living Organisms
Chapter 16: Heredity and Variation
Chapter 17: Introduction to Biotechnology
Chapter 18: Observing Space : Telescopes
Chapter 4: Measurement of Matter
Balbharati solutions for Science and Technology 9th Standard Maharashtra State Board Chapter 4 Measurement of Matter Exercise [Page 57]
Give example.
Positive radicals
Give example.
Basic radicals
Give example.
Composite radicals
Give example.
Metals with variable valency
Give example.
Bivalent acidic radicals
Give example.
Trivalent basic radicals
Write symbols of the following elements and the radicals obtained from them and indicate the charge on the radicals.
Mercury, potassium, nitrogen, copper, sulphur, carbon, chlorine, oxygen
Write the steps in deducing the chemical formulae of the following compounds.
Sodium sulphate, potassium nitrate, ferric phosphate, calcium oxide, aluminium hydroxide
Write answer to the following question and explain your answer.
Explain how the element sodium is monovalent.
Write answer to the following question and explain your answer.
M is a bivalent metal. Write down the steps to find the chemical formulae of its compounds formed with the radicals, sulphate and phosphate
Write answer to the following question and explain your answer.
Explain the need for a reference atom for atomic mass. Give some information about two reference atoms.
Write answer to the following question and explain your answer.
What is meant by Unified Atomic Mass.'
Write answer to the following question and explain your answer.
Explain with examples what is meant by a 'mole' of a substance .
Write the names of the following compounds and deduce their molecular masses.
Na2SO4, K2CO3, CO2, MgCl2, NaOH, AlPO4, NaHCO3
Two samples ‘m’ and ‘n’ of slaked lime were obtained from two different reactions. The details about their composition are as follows:
‘sample m’ mass : 7g
Mass of constituent oxygen : 2g
Mass of constituent calcium : 5g
‘sample n’ mass : 1.4g
Mass of constituent oxygen : 0.4g
Mass of constituent calcium : 1.0g
Which law of chemical combination does this prove? Explain.
If 0.2 mol of the following substances are required how many grams of those substances should be taken?
Sodium chloride, magnesium oxide, calcium carbonate
Chapter 4: Measurement of Matter
Balbharati solutions for Science and Technology 9th Standard Maharashtra State Board chapter 4 - Measurement of Matter
Balbharati solutions for Science and Technology 9th Standard Maharashtra State Board chapter 4 (Measurement of Matter) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the Maharashtra State Board Science and Technology 9th Standard Maharashtra State Board solutions in a manner that help students grasp basic concepts better and faster.
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Concepts covered in Science and Technology 9th Standard Maharashtra State Board chapter 4 Measurement of Matter are Law of Conservation of Matter, Law of Constant Proportions, Chemical Symbols of Elements, Variable Valency, Chemical Formulae of Compound : Recapitulation, Molecules of Elements, Atomic Size, Mass Number (A) or Atomic Mass, Valency and Its Types, Concept of Molecular Mass, Laws of Chemical Combination.
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