Class 7 science chapter 5 Exercise Queastion answer#trending #class #ncert #sciencesolutions #viral
In this Vedio solved Complete EXERCISE with Explanation hindi& English language CHAPTER VEDIO LINK - • || CLASS - 7 || SCIENCE II CHAPTER - 5 II ... **----------------**--------------*-------------** ✍️Welcome to my YouTube🙏 Channel - @ncertsamradclasses Link - / @samradclasses *------------------*--------------------*--------- 🎤इस चैनल के माध्यम से हम आपको कक्षा 6 से 12th तक की Ncert (Science) विज्ञान Book हिन्दी और इंग्लिश दोनो माध्यम मे पढ़ाएंगे ! हमे Spport करने के लिए 🙏धन्यवाद ________________________ Class 7 Science chapter 5 Class 7 Science 5 physical and chemical changes class 7 science chapter 5keywords science class 7 Chapter 5Questionanswer. science class 7 chapter 5keywords science class 7 chapter 5exercise chapter 5class 7 science chapter 5class 7 science keywords chapter 5class 7 science exercise chapter 5 class 7 science notes chapter 5class 7 science explanation ncert class 7 science chapter 5 physical and chemical changes class 7 what is physical changes what is chemical changes what is physical and chemical changes class 7 Class 7 science chapter 5 exercise class 7 science chapter 5 Class 7Science chapter 5exercise solution class 7science chapter 5 exercise Question ncert class as science class 7 Acids,bases and Salts class 7 science class 7 science chapter 5 science class 7 science class 7 chapter 5 science class 7 chapter 5 physical and chemical changes class 10 class 7 ncert class 7 class 7 chemistry exercise question answer class 7 science chapter 5 acid bases and salts question answer chapter 5science exercise question answer ncert chapter 5 science exercise question class 7 science chapter 5 science class 7 chapter 5 question answer acids,bases and salts exercise question answer acids, bases and salts question answer class7 ncert class 7 science chapter 5 question answer ncert book class 7 science chapter 5 question answer 1. Classify the changes involved in the following processes as physical or chemical changes: (a) Photosynthesis (b) Dissolving sugar in water (c) Burning of coal (d) Melting of wax (e) Beating aluminium to make aluminium foil (f) Digestion of food 2. State whether the following statements are true or false. In case a statement is false, write the corrected statement in your notebook. (a) Cutting a log of wood into pieces is a chemical change. (True/False) (b) Formation of manure from leaves is a physical change. (True/False) (c) Iron pipes coated with zinc do not get rusted easily. (True/False) (d) Iron and rust are the same substances. (True/False) (e) Condensation of steam is not a chemical change. (True/False) 3. Fill in the blanks in the following statements: (a) When carbon dioxide is passed through lime water, it turns milky due to the formation of ______. (b) The chemical name of baking soda is _____. (c) Two methods by which rusting of iron can be prevented are ______ and _____. (d) Changes in which only _____ properties of a substance change are called physical changes. (e) Changes in which new substances are formed are called ____ changes. 4When baking soda is mixed with lemon juice, bubbles are formed with the evolution of a gas. What type of change is it? Explain. 5When a candle burns, both physical and chemical changes take place. Identify these changes. Give another example of a familiar process in which both the chemical and physical changes take place. 6How would you show that setting of curd is a chemical change? 7Explain why burning of wood and cutting it into small pieces are considered as two different types of changes. 8Describe how crystals of copper sulphate are prepared. 9. Explain how painting of an iron gate prevents it from rusting. 10. Explain why rusting of iron objects is faster in coastal areas than in deserts. 11The gas we use in the kitchen is called liquified petroleum gas (LPG). In the cylinder it exist as a liquid. When it comes out from the cylinder it becomes a gas (Change – A) then it burns (Change – B). The following statements pertain to these changes. Choose the correct one. (i) Process – A is a chemical change. (ii) Process – B is a chemical change. (iii) Both processes A and B are chemical changes (iv) None of these processes is a chemical change. 12Anaerobic bacteria digest animal waste and produce biogas (Change – A) The biogas is then burnt as fuel (Change – B). The following statements pertain to these changes. Choose the correct one. (i) Process – A is a chemical change. (ii) Process – B is a chemical change. Both processes A and B are chemical changes. (iv) None of these processes is a chemical change. Keywords Chemical change Chemical reaction Crystallisation Galvanisation Physical change Rusting #class7 #class7science #class7sciencequestionandanswer #ncertscience #ncertsciencesolution#uvlearn #viralvideo #physicalandchemicalchanges #exercisesolution #ncertsamradclasses