Podcast
Questions and Answers
A student mistakenly stores curd in a brass vessel. What chemical process is most likely to occur, and why is this undesirable?
A student mistakenly stores curd in a brass vessel. What chemical process is most likely to occur, and why is this undesirable?
- Redox reaction, where the curd's components oxidize the brass, enhancing the curd's nutritional value.
- Displacement reaction, as the acid in the curd reacts with the metal, forming toxic compounds. (correct)
- Esterification, leading to the formation of pleasant-smelling esters that improve curd flavor.
- Neutralization, because the brass neutralizes the acid in the curd, making it taste better.
Which of the following is the most accurate description of the role and application of bleaching powder?
Which of the following is the most accurate description of the role and application of bleaching powder?
- It's used as a disinfectant due to its oxidizing properties, commonly applied in water treatment. (correct)
- It's composed of sodium hydroxide, and its primary use is in the production of soap.
- Its chemical formula is $NaHCO_3$, and its main use is as an antacid.
- It is primarily used to maintain pH levels in swimming pools due to its acidic nature.
Which statement best describes the difference between ionic and covalent compounds, considering their electron behavior and properties?
Which statement best describes the difference between ionic and covalent compounds, considering their electron behavior and properties?
- Ionic compounds exist as gases at room temperature and covalent compounds exist as solids.
- Ionic compounds share electrons and have low melting points, while covalent compounds transfer electrons and have high melting points.
- Ionic compounds are formed by the transfer of electrons and conduct electricity in solution, while covalent compounds share electrons and generally do not conduct electricity. (correct)
- Ionic compounds are always organic, containing carbon, while covalent compounds are always inorganic and lack carbon.
Consider a scenario where ethanol undergoes oxidation. Which product would indicate complete oxidation, and what are the common applications of the original ethanol?
Consider a scenario where ethanol undergoes oxidation. Which product would indicate complete oxidation, and what are the common applications of the original ethanol?
If a person is diagnosed with myopia, how does this condition affect their vision, and what type of lens is used to correct it?
If a person is diagnosed with myopia, how does this condition affect their vision, and what type of lens is used to correct it?
Which of the following best explains the reason for the reddish appearance of the sky during sunrise and sunset?
Which of the following best explains the reason for the reddish appearance of the sky during sunrise and sunset?
Consider a scenario where multiple electrical appliances are connected to a single socket, leading to an overload. Which safety measure is designed to prevent damage in such situations?
Consider a scenario where multiple electrical appliances are connected to a single socket, leading to an overload. Which safety measure is designed to prevent damage in such situations?
What would be the most effective strategy for managing electronic waste to minimize its impact on the environment?
What would be the most effective strategy for managing electronic waste to minimize its impact on the environment?
When examining a food chain, what role do decomposers play, and what process related to their function is particularly significant for nutrient availability?
When examining a food chain, what role do decomposers play, and what process related to their function is particularly significant for nutrient availability?
Which of the following options best describes the process and significance of biomagnification in an ecosystem?
Which of the following options best describes the process and significance of biomagnification in an ecosystem?
Flashcards
Esterification Reaction
Esterification Reaction
Reaction where alcohol reacts with a carboxylic acid to form an ester and water.
Addition Reaction
Addition Reaction
A reaction in which atoms add to a multiple bond, such as C=C or C≡C, increasing the saturation of the molecule, usually requiring a catalyst.
Human Excretory System
Human Excretory System
System which removes waste from the body, including the kidneys, ureters, bladder, and urethra.
Human Respiratory System
Human Respiratory System
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Human Digestive System
Human Digestive System
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Lymph
Lymph
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Myopia
Myopia
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Hypermetropia
Hypermetropia
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Diffraction of Light
Diffraction of Light
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Electric Fuse
Electric Fuse
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Study Notes
Overview
- The session is focused on important science questions for 10th-grade students preparing for the 2025 board exams.
- The question list originates from a previous session in Gujarati.
- Accuracy is based on a 7-year track record.
- The goal is achieving high scores, aiming for "99 पार" (99+ marks).
- The session provides guidance on section-wise questions (D, C, B, A).
- A session on math questions will be unlocked upon reaching 3000 likes on the video.
- There will be Viva জুড়, which is a revision session, the night before the exams at 9:30 PM.
Section D: 4-Mark Questions
- Section D has a total of 20 marks.
- From eight questions, students must answer five.
- Questions come from chapters 2, 4, 5, 10, 12, and 13, with chapters 2 and 5 potentially having two questions each.
Chapter 2: Acid Base and Salts
- Questions 47 and 48 are from this chapter.
- Prepare questions related to:
- Diagram and description of the experiment involving zinc granules reacting with diluted sulfuric acid.
- Importance of pH in treating honey bee stings and preventing tooth decay.
- Reasons for avoiding storing curd in brass and copper vessels, and description of basic oxides with examples.
- Importance of pH in the digestive system, the formula and uses of bleaching powder.
- Composition, properties, and uses of Plaster of Paris.
- Composition of washing soda and baking soda, and the differences between them.
Chapter 4: Carbon and Its Compound
- Chapter 4 is covered in question 49.
- Prepare questions on:
- Esterification reaction, including writing the equation.
- Addition reaction, explained with examples.
- The cleaning action of soap, explained with a diagram.
- Functional groups, naming any four, with two examples each.
- Ethanol oxidation, physical properties, and uses.
- Molecular formula and electron dot structure of cyclopentane, and differences between ionic and covalent compounds.
- Structural isomers, drawing the isomers of pentane.
Chapter 5: Life Processes
- Chapter 5 is included in questions 50 and 51.
- Key topics:
- Excretion, including a diagram of the human excretory system and its structure.
- The human respiratory system, with a diagram.
- The human digestive system, with a diagram.
- Lymph: its production, transport, and functions.
- Nutrition in amoeba, with a diagram.
- Urine formation in nephrons, using a diagram.
Chapter 10: Human Eye and Colourful World
- Chapter 10 is in question 52.
- Questions to prepare:
- Causes and avoidance of myopia, using diagrams.
- Causes and avoidance of hypermetropia, using a diagram.
- Diffraction of light by a prism.
- Reasons for early sunrise and late sunset.
- Diagram of the human eye, naming four parts and stating the functions of two.
- Why stars twinkle and the sky appears blue.
Chapter 12: Magnetic Effect of Electric Current
- Chapter 12 is in question 53.
- Questions to prepare:
- Precautions when using electricity, and three causes of overloading in domestic circuits.
- Electric short circuits, function of earthing wire, and why earthing metal equipment is necessary.
- Electric fuses, and how they work.
- Solenoids and their magnetic field characteristics.
- Magnetic field lines: drawing them around a magnet and listing their properties.
- Oersted's experiment, proving electric current produces a magnetic field.
Chapter 13: Our Environment
- Prepare questions on:
- Necessity of controlling pesticide use and managing electronic waste.
- Types of waste, ozone depletion, and chemicals responsible.
- Trophic levels, explaining different levels with a diagram.
- Ecosystems, their components, and ozone formation.
- Decomposers and their role in the ecosystem, and biomagnification.
Section C: 3-Mark Questions
- Section C is worth 18 marks, with questions 38-46 being worth three marks each; six of the nine questions need to be answered.
- Chapters 1, 3, 6, 7, 9, and 11 are included.
- Two questions can be asked from Chapters 3, 7, and 9.
Chapter 1: Chemical Reactions and Equation
- Redox reactions with examples.
- Combination reactions with examples.
- Exothermic and endothermic processes with examples, and respiration as a warming process.
- Malnutrition and its prevention.
- Types of decomposition processes with examples.
Chapter 3: Metals and Nonmetals
- Six differences between metallic and non-metallic elements.
- Alloys: advantages, and examples.
- Formation of magnesium chloride by electron exchange.
- Steps for corrosion prevention.
- The thermic process with an equation.
- Electrolysis for refining metals using a diagram.
Chapter 6: Control and Coordination
- Endocrine glands secreting fight or flight hormones and their effects.
- Defects caused by endocrine imbalances in humans.
- Reflex arcs and reflex actions of the spinal cord.
- Structure and functions of a neuron, with a diagram.
- Plant hormones and their functions.
Chapter 7: How Do Organisms Reproduce
- Puberty and sexual changes during puberty.
- The female reproductive system, with a diagram and explanation.
- Asexual reproduction: budding and spore formation with diagrams.
- Embryo formation in women and stages leading to birth.
- Functions of the human testis, seminal vesicle, and prostate gland.
- Scientific methods of preventing pregnancy.
- Vegetative reproduction, and its advantages.
Chapter 9: Light Reflection and Refraction
- Power of a lens with detailed explanation.
- Ray diagram of image formation in a concave mirror when the object is at the center of curvature.
- Refraction of light and its laws.
- Image position and magnification formed by convex lenses when the object is at 2f and between f and 2f.
- Refraction through a rectangular glass slab, with a diagram.
- Mirrors used in car headlights, side mirrors, and solar furnaces with reasons.
- Numerical -- Examples - 9.1, 9.2,9.3 and 9.4
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- Exercise- 10,11,14,15 and 17
Chapter 11: Electricity
- Thermal effect of electric current and why Nichrome alloy is used in toasters and electric irons instead of pure metal.
- Derivation of the formula for equivalent resistance in a series connection.
- Derivation of the formula for equivalent resistance in a parallel connection.
- Practical applications of the heating effect of electric current with examples.
- Numerical
- Examples = 11.5, 11.7, 11.8, 11.9, 11.10 and 11.13,
- Exercises= 7, 12, 13, 15, 16 and 18
Section B: 2-Mark Questions
- This section is worth 18 marks, with questions 25-37 each worth 2 marks, and has a total of 9 questions.
- Chapters from which questions will be taken are 1, 3, 5, 7, 10, 11 and 12.
- Chapters 5, 7, 11, and 13 may have two questions.
Section A: 1-Mark Questions
- All 24 questions are compulsory.
- The chapter-wise split:
- 1-6 (MCQ): Chapters 2, 4, 5, 11, 10, 10
- 7-12 (Fill in the Blanks): Chapters 4, 12, 5, 8, 9, 3
- 13-16 (True or False): Chapters 3, 7, 10, 2
- 17-20 (One-word Answer): Chapters 6, 8, 10, 11
- 21-24 (Match the Following): Chapters 6, 13, 13
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