File Name: chemical reactions and equations class 10 extra questions .zip
High Order Thinking Skills questions come in exams for Science in Standard 10 and if prepared properly can help you to score more marks. He observed bubbles along with hissing noise. Identify X. What type of reaction is it? A student has mixed the solutions of lead II nitrate and potassium iodide. Can you name the compound? Do you observe anything happening around the zinc granules?
These questions and answers are important for board exam preparations. All these questions and answers are based on the NCERT textbook and are important for the preparations of the upcoming board exam. These extra questions will be helpful to revise the important topics and concepts. You can easily download all the questions and answers in PDF format. Why do we need to balance a chemical equation? Name two salts that are used in black and white photography. What is the product formed on adding quick lime to water?
When magnesium ribbon burns in air, it combines with the oxygen to form magnesium oxide. On what chemical law, balancing of chemical equation is based? Balancing of a chemical equation is based on the law of conservation of mass. Name the gas evolved when zinc reacts with dil. Hydrogen gas is evolved. Name and state the law which is kept in mind while we balance a chemical equation. Law of conservation of mass.
According to new CBSE Exam Pattern, MCQ Questions for Class 10 Science pdf Carries 20 Marks. Topics and Sub Topics Covered in NCERT.
What happens chemically when quick lime is added to water?
Class 10 Science Chapter 1 Important Questions are given below to use online updated for new academic session These sets of questions contains questions with answers of NCERT Books intext questions, back exercises questions and previous year questions. Set of important questions also contains some extra questions which are important for class tests and schools exams. These are also considered as expected questions for board exams. Whenever a chemical change occurs, we can say that a chemical reaction has taken place. Chemical change involves change in state, change in colour, evolution of a gas, change in temperature. The description of a chemical reaction in a shorter form is called chemical equation The simplest way to do this is to write it in the form of a word-equation.
Question 1. Question 2. What is wrong with the following equation? Answer: In this equation, oxygen should be in molecular form O 2.
Question-1 What is the method of balancing chemical equation? Solution: Hit and trial method is used for balancing simple chemical equations. Question-2 Why is it necessary to balance a chemical equation? Solution: We know that, according to the law of conservation of mass, the total mass of all the atoms present in the reactants should be equal to that of all the atoms present in the products. This law will hold good only when the number of atoms of all types of elements on both sides is equal.
Silver do not evolve hydrogen on reacting with dil. Way do diamond and graphite, the two allotropic forms of carbon evolve different amounts of heat on combustion? Diamond and graphite are the two allotropes of carbon but they do not evolve same amount of heat on combustion because they differ in the arrangement of carbon atoms and also their shapes one different. What is the sole of oxidizing agent is a reaction? The oxidizing agent supply the oxygen in a reaction or it removes the hydrogen.
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