Chemical Change - A burning log smoulders into ash. Rust eats away at a door handle. Our bodies change food into energy. Learn more about chemical change and other physical changes in BYJU'S in detail
Class 8CHEMISTRYPHYSICAL AND CHEMICAL CHANGES Topper's Solved these Questions PHYSICAL AND CHEMICAL CHANGESBook:ICSEChapter:PHYSICAL AND CHEMICAL CHANGESExercise:Exercise (Tick the most appropriate answer) Explore5Videos PHYSICAL AND CHEMICAL CHANGESBook:ICSEChapter:PHYSICAL AND CHEMICAL CHANGESExercise:Exercise...
Chemical Reactions Questions and Answers - Practice questions, MCQs, PYQs, NCERT Questions, Question Bank, Class 11 and Class 12 Questions, NCERT Exemplar Questions, and PDF Questions with answers, solutions, explanations, NCERT reference, and difficulty
Give balanced chemical equation for the following reactions : Formaldehyde is treated with ammonia. View Solution Doubtnut is No.1 Study App and Learning App with Instant Video Solutions for NCERT Class 6, Class 7, Class 8, Class 9, Class 10, Class 11 and Class 12, IIT JEE prep, NEET pr...
Mastering Class 12 Chemistry Chapter 3: Chemical Kinetics - Question and Answers 1. For the reaction $\text{R}\to \text{P}$, the concentration of a reactant changes from 0.03 M to 0.02 M in 25 minutes. Calculate the average rate of reaction using units of time both in minutes and sec...
answer. rust formation occurs when the iron is exposed to air and moisture. rust is nothing more than iron oxide, a byproduct of the reaction. the colour of the iron’s surface also changes. as a result, iron rusting is a chemical change. q13. how chemical energy is stored in food?
α-form. at 910°c, it changes to γ-iron, which is much softer in nature. it melts at 1536°c and boils at 2861°c. being a metal is magnetic in nature. why is iron different from other elements? the difference is the number of protons found in the nucleus of the atoms. the ...
Step-by-Step Solution:1. Understanding Chemical Reactions: - A chemical reaction involves the transformation of reactants into products. It is essential for studying the behavior of substances when they inte
Step-by-Step Text SolutionMain Characteristics of Chemical Reactions:1. Evolution of Gas: - In certain chemical reactions, one of the products formed is a gas. This is often observed
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