Smart Study Answers

 Here are all the important questions from Class 7 Science Chapter 5 – Acids, Bases and Salts , categorized by type for better understanding and revision: 🔹 Very Short Answer Questions (1 mark) What is the taste of acids? What is the taste of bases? Name a natural indicator. What is turmeric used for in science experiments? What is the colour of litmus in acid? What is the colour of litmus in base? What type of solution turns blue litmus red? What type of solution turns red litmus blue? 🔹 Short Answer Questions (2–3 marks) What are acids? Give two examples. What are bases? Give two examples. What are indicators? Name any two natural indicators. What is neutralisation? What is the use of neutralisation in daily life? Write two differences between acids and bases. What happens when an acid reacts with a base? Name the products formed when an acid reacts with a base. What is the colour change of China rose indicator in acid a...

Chapter 5 of Class 7 Science is "Acids, Bases and Salts" . Here are some important questions and answers from the chapter: Short Answer Questions 1. What are acids? Acids are substances that taste sour and turn blue litmus red. Examples include lemon juice, vinegar, and hydrochloric acid. 2. What are bases? Bases are substances that taste bitter and turn red litmus blue. Examples include baking soda, lime water, and sodium hydroxide. 3. What is an indicator? An indicator is a substance that changes color in acidic or basic solutions. It helps in identifying whether a substance is acidic or basic. 4. Name two natural indicators. Litmus and turmeric are natural indicators. 5. What is neutralisation? The reaction between an acid and a base to form salt and water is called neutralisation. Fill in the blanks Acids have a ___ taste. → sour Bases turn ___ litmus ___. → red, blue The chemical name of baking soda is ___. → sodium hydrogen carbonate Neutralisation pr...

 Class 7 Science Chapter 5 in the NCERT curriculum is titled "Acids, Bases and Salts." Here's a quick summary along with important points and a few questions and answers to help you understand the chapter. 🔍 Chapter Summary: Acids, Bases and Salts 1. Acids Taste sour . Found in substances like lemon juice (citric acid), vinegar (acetic acid), curd (lactic acid), tamarind (tartaric acid). Turn blue litmus red . 2. Bases Taste bitter and feel soapy . Found in soap (sodium hydroxide), lime water (calcium hydroxide), milk of magnesia (magnesium hydroxide). Turn red litmus blue . 3. Indicators Special substances used to test whether a substance is acidic or basic. Common indicators: Litmus paper , turmeric , china rose , phenolphthalein . Litmus: Blue → Red (acid), Red → Blue (base). Turmeric: Yellow → Red (base). China rose: Light pink in acid, green in base. 4. Neutral Substances Not acidic or basic. Do not change the col...

 Here are important questions from Class 7 Science – Chapter 1: Nutrition in Plants . These questions cover all major concepts, including modes of nutrition, photosynthesis, and nutrient replenishment in soil . 🔹 1 Mark Questions (Very Short Answer) What is the mode of nutrition in plants? Define autotrophs. Name the pigment responsible for photosynthesis. What do you mean by photosynthesis? Write the chemical equation for photosynthesis. Name two organisms that can prepare their own food. What are heterotrophs? Give one example of a parasitic plant. What are nutrients? Name the gas used in photosynthesis. Name one non-green plant that is parasitic. What is chlorophyll? Which part of the plant absorbs sunlight for photosynthesis? Name a saprotrophic plant. What is the role of stomata in leaves? 🔹 2–3 Marks Questions (Short Answer) Explain the process of photosynthesis. How do plants get nitrogen for their growth? What is...

A complete set of important questions and answers from Class 7 Science Chapter 4: Heat , written in easy language for students to understand and revise easily. 📘 Class 7 Science – Chapter 4: Heat 🔥 Important Questions and Answers 🔹 1. Q: What is heat? A: Heat is a form of energy that makes things hot. It flows from a hotter object to a colder one. 🔹 2. Q: What is temperature? A: Temperature is the measure of how hot or cold an object is. 🔹 3. Q: What device is used to measure temperature? A: A thermometer is used to measure temperature. 🔹 4. Q: What is the unit of temperature in the SI system? A: The SI unit of temperature is Kelvin (K) . However, Celsius (°C) is commonly used. 🔹 5. Q: What is a clinical thermometer? A: A clinical thermometer is used to measure the body temperature of humans. 🔹 6. Q: What is the normal human body temperature? A: 37°C or 98.6°F. 🔹 7. Q: What is the temperature range of a clinical thermometer? A: 35°C to 42°C. ...

class 7 science chapter 3 important questions​  and answers from Class 7 Science – Chapter 3: Fibre to Fabric , written in easy and simple language so students can understand and learn easily. 📘 Class 7 Science – Chapter 3: Fibre to Fabric 🧵 Important Questions and Answers (1–50) 1. Q: What are fibres? A: Fibres are thin, thread-like strands used to make cloth. 2. Q: What are the two main types of fibres? A: Natural fibres and synthetic fibres. 3. Q: What are natural fibres? A: Fibres that come from plants or animals, like cotton, wool, silk. 4. Q: Give examples of plant-based natural fibres. A: Cotton and jute. 5. Q: Give examples of animal-based natural fibres. A: Wool and silk. 6. Q: What are synthetic fibres? A: Fibres made by humans using chemicals, like nylon and polyester. 7. Q: From where do we get wool? A: From the fleece (hair) of animals like sheep, goats, camels, and rabbits. 8. Q: From which part of the plant do we get cotton? A: ...