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प्रश्न
Differentiate between in Chemical reaction and chemical equation.
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उत्तर
| Chemical reaction | Chemical Equation |
| Any chemical change in matter which involves its transformation into one or more new substances is called a chemical reaction. | A chemical equation is the symbolic representation of a chemical reaction using the symbols and the formula of the substances involved in the reaction. |
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संबंधित प्रश्न
The chemical name of baking soda is ______.
The gas we use in the kitchen is called liquefied petroleum gas (LPG). In the cylinder, it exists 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.
Fill in the blank
A catalyst either ................or ............... the rate of a chemical change but itself remains ............... at the end of the reaction.
Write the missing reactants and products and balance the equations.
\[\ce{KClO3 ->[heat]}\] ___________+ ____________
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Reduction is a chemical reaction in which there is
- removal of hydrogen
- removal of oxygen
- addition of oxygen
- none of these
FILL IN THE BLANK
Negatively charged ions are called ..........
FILL IN THE BLANK
In a ............ change, new substances are formed.
TRUE \ FALSE
Electrolytic refining is a method in which a thin coating of a metal is done over another metal.
Explain by writing a word equation.
Limestone powder disappears on adding to dilute hydrochloric acids.
What is a chemical reaction?
Give an example of a reaction where the following are involved
Heat
What is observed in performing the following :
| Hydrogen | Oxygen | Carbon dioxide | Chlorine | |
| Litmus test | ||||
| Apply a burning splint to the gas | ||||
| Colour of gas | colourless | colourless | colourless | greenish-yellow |
| Odour of gas |
Distinguish by heating the following in dry test tubs.
Copper Sulphate and copper carbonate
A chemical reaction is often accompanied by external indications or characteristics.
Give a balanced equation for a reaction involving the evolution of gas on the addition of dilute acid to sodium sulphite.
Select the correct answer from the options given below:
State the gaseous product formed, when
An active metal reacts with dilute sulphuric acid.
What happens when cane sugar is strongly heated? Mention any two changes in it.
What is the role of a catalyst in a chemical reaction?
Classify the following as physical or chemical properties
Zinc dissolves in hydrochloric acid with the evolution of hydrogen gas.
What is thermochemical reactions?
