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WHAT IS CATALYST? A substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change is known as catalyst. like: nickle,paladium chlorine is also act as a catalyst promoting the breaking of ozone.
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WHAT IS CATALYST? A substance that increases the rate of a chemical re...
Catalysts are those elements that has powers to increase the rate of a chemical reaction. Yes , your all about Catalyst are true.
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Read the given passage and answer the question :A sample of water which gives lather with soap with difficulty is known as hard water, while a sample of water which gives lather with soap easily is known as soft water. Hardness of water is due to the presence of bicarbonates, sulphates and chlorides of calcium and magnesium. Hardness of water is of two types, temporary and permanent hardness. When hardness of water is due to the presence of bicarbonates of magnesium and calcium, it is called temporary hardness. When hardness of water is due to the presence of sulphates and chlorides of magnesium and calcium, it is called permanent hardness.The amount of hardness causing substances in a certain volume of water measures the extent of hardness or degree of hardness. Hardness of water is always calculated in terms of calcium carbonate although it is never responsible for causing hardness of water because of its insoluble nature. The reason for choosing calcium carbonate as the standard for calculating hardness of water is the ease in calculation as its molecular weight is exactly 100. Degree of hardness is usually expressed as parts per million (ppm).Q. Why do soaps not form lather (foam) with hard water?

Read the given passage and answer the questions:Metallic Character: The ability of an atom to donate electrons and form positive ions (cation) is known as electro-positivity or metallic character. Down the group, metallic character increases due to increase in atomic size and across the period, from left to right electropositivity decreases due to decrease in atomic size. Non-Metallic Character: The ability of an atom to accept electrons to form a negative ion (anion) is called non-metallic character or electronegativity. The elements having high electro-negativity have a higher tendency to gain electrons and form anion. Down the group, electronegativity decreases due to increase in atomic size and across the period, from left to right electro -negativity increases due to decrease in atomic size.Identify the reason for the gradual change in electronegativity in halogens down the group.

Read the given passage and answer the questions:Metallic Character: The ability of an atom to donate electrons and form positive ions (cation) is known as electro-positivity or metallic character. Down the group, metallic character increases due to increase in atomic size and across the period, from left to right electropositivity decreases due to decrease in atomic size.Non-Metallic Character: The ability of an atom to accept electrons to form a negative ion (anion) is called non-metallic character or electronegativity. The elements having high electro-negativity have a higher tendency to gain electrons and form anion. Down the group, electronegativity decreases due to increase in atomic size and across the period, from left to right electro -negativity increases due to decrease in atomic size.Which of the following reasons correctly justifies that “Fluorine (72pm) has a smaller atomic radius than Lithium (152pm)”?

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WHAT IS CATALYST? A substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change is known as catalyst. like: nickle,paladium chlorine is also act as a catalyst promoting the breaking of ozone.
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WHAT IS CATALYST? A substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change is known as catalyst. like: nickle,paladium chlorine is also act as a catalyst promoting the breaking of ozone. for Class 10 2024 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about WHAT IS CATALYST? A substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change is known as catalyst. like: nickle,paladium chlorine is also act as a catalyst promoting the breaking of ozone. covers all topics & solutions for Class 10 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for WHAT IS CATALYST? A substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change is known as catalyst. like: nickle,paladium chlorine is also act as a catalyst promoting the breaking of ozone..
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