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Class 09 Atoms and Molecules Numerical Problem based on Law of chemical Combination(Solved)

Class 09 Atoms and Molecules Numerical Problem based on Law of chemical Combination Law of conservation of mass Law of constant proportion Empirical formula 1. If 10 grams of CaCO 3 on heating gave 4.4g of CO 2 and 5.6g of CaO, show that these observations are in agreement with the law of conservation of mass.(Based on Law of conservation of mass) Solution:  Mass of the reactants = 10g ;  Mass of the products = 4.4 + 6.6g = 10g Since the mass of the reactants is equal to the mass of the products, the observations are in agreement with the law of conservation of mass. 2. 1.375 g of cupric oxide was reduced by heating and the weight of copper that remained was 1.098g.  In another experiment 1.179 g of copper was dissolved in nitric acid and the resulting copper nitrate was converted into cupric oxide by ignition . The weight of cupric oxide formed was 1.476 g. which law of chemical combinations does this data state? Solution: in first experiment: Copper oxide = 1.375g ;   Coppe

Class 08 Science chapter Crop production and management video Lecture

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Class 07 Chapter Fibre to febric Video Lesson by Jsunil sir

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Class 07 Nutrition In Animals Video lesson by Jsunil SirI Jsunil Tutorial

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Class 07 Chapter Nutrition in Plants video Lesson by Jsunil Sir

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Life Process class 10 Video Lesson by Jsunil Sir Jsunil Tutorial

Biology Class 10 Chapter Life Process class 10   Like and subscribe channel  Watch Video Life process Part 01  Life process Part 02  Life process Part 03  Life process Part 04  Life process Part 05  Life process Part 06  Life process Part 07  Life process Part 08  Life process Part 09  Life process Part 10 

Life Process class 10 Trend setter solved CBSE Test paper

CBSE TEST PAPER-01  SCIENCE & TECHNOLOGY  (Class-10) Chapter 6 : Life Process 1 . What are the raw materials for photosynthesis? (1 mark) Answer: The raw materials and other necessary items required for photosynthesis are Sunlight, Water, CO 2 and Chlorophyll. 2. What is the role of bile juice in digestion? (1 mark) Answer: Bile is alkaline in nature and it is temporarily stored in gallbladder  and helps in digestion of fats,   it also helps in absorption fats. 3. Write the equation for respiration? (1 mark) Answer: C 6 H 12 O 6   --- > C 3 H4O 3   ----->   6CO2 +  6H2O +  38ATP 4. Name three types of blood vessels used in the transport of blood. (1 mark) Answer: Arteries, vein and capillaries Note: There are three major types of blood vessels: the arteries, which carry the blood away from the heart; the capillaries, which enable the actual exchange of water and chemicals between the blood and the tissues; and the veins, which carry blood from the