Chemistry Class 9 Chapter 7 Important Questions Answers 2023 Chemistry Class 9th Chapter 7 Electrochemistry Important Q/A’s QUESTION .1 What is meant by oxidation and reduction? ANSWER Oxidation The loss of electrons, gain of oxygen or the loss of hydrogen is termed as oxidation. Reduction The gain of electrons, loss of oxygen and gain of …
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Chemistry Class 9 Chapter 6 Important Questions Answers 2023 Chemistry Class 9 Chapter 6 ( Solutions ) Important Question/Answers QUESTION.1 Define the terms: A. Solution B. Aqueous solution C. Solute D. Solvent Answer Solution A homogenous mixture of two or more components with particles smaller than one nm is referred to as a solution. Solutions …
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Chemistry Class 9 Chapter 5 Important Questions Answers 2023 9th Chemistry QUESTION 1 What are the typical properties of gases? ANSWER GASES A form of matter known as gas lacks both a set shape and a fixed volume. Compared to other states of matter, such as solids and liquids, gases have a lower density. Particles …
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Chemistry Class 9 Chapter 4 Important Question Answers 2023 9th Chemistry Chapter 4 Structure of Molecules Q.1 Why do atoms react? Answer Atoms react with each other to attain stability. All the atoms except those of noble gases are unstable because their valence shell is incomplete. So, atoms react with each other by loss, gain, …
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Chemistry Class 9 Chapter 3 Important Question Answers 9th Class Chemistry Periodic Table and Periodicity of Properties Q: How do you find the Group number of the periodic table elements? Trick to find Periodic Table Elements Group number Group Number = Number of valence electron Q: What is the electron arrangement of an element with …
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Class 9 Chemistry 1st Chapter Important Short Questions What do moles mean in chemistry? In chemistry, a mole, sometimes spelled mol, is a standard scientific unit for measuring huge amounts of very small entities like atoms, molecules, and other defined particles. or A mole is the mass of a substance that contains 6.023 x 1023 particles …
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Chemistry Class 9 Chapter 2 Structure of Atoms Important Question SLO Based Federal Board Chemistry slo fbise Class 9 Important Question/Answers Q. What were the observations of Rutherford’s experiment? Answer: Rutherford atomic model Diagram Rutherford’s Gold Foil Experiment Rutherford scattering experiment conclusion Q. What does Rutherford’s model explain? Ans. It explains that an atom is …
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Periodicity of Properties According to the fundamental law regulating the contemporary periodic table, an element’s properties are periodic functions of its atomic number. These characteristics repeat frequently or follow a specific pattern frequently. The periodicity of properties is the name given to this phenomenon. EXPLANATION Due to the repetition of comparable electronic configurations with the …
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Representative Elements and Transition elements Representative elements The periodic table’s groups 1 and 2, as well as groups 13 to 18, contain the representative elements.In other words, the terms “representative elements” refer to both s-block and p-block elements collectively. The term “representative elements” refers to elements with complete inner shells but incomplete outer shells, i.e., …
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