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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
TRUE \ FALSE
Copper can displace iron from iron sulphate.
How is precipitate formation in a chemical reaction indicated?
Define chemical reaction.
Fill in the blank:
The substances formed as a result of a chemical reaction are called _______
Fill in the blank:
During a chemical reaction transfer of ________ takes place.
Complete the statement by filling the gaps using appropriate term from the terms given in the bracket.
(slow, coloured, arrow, fast, smell, milky, physical, product, chemical, reactant, covalent, ionic, octet, duplet, exchange, sharing, equality sign)
A colourless solution of calcium hydroxide in a test tube turns ______ on blowing in it through a blow tube for some time.
Explain by writing a word equation.
Limestone powder disappears on adding to dilute hydrochloric acids.
Choose the correct option from the bracket and explain the statement giving a reason.
(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition)
Addition of an aqueous solution of ZnSO4 to an aqueous solution of BaCl2 is an example of ______ reaction.
What do you observe when Cl2 is passed through potassium iodide (KI) solution.
Give a chemical test to distinguish between the following gases.
SO2 and Cl2
Name the following:
The type of change physical or chemical involved – ‘during respiration in human beings’.
A chemical reaction is often accompanied by external indications or characteristics which include –
- Colour change
- Effervescence or gas evolved
- Evolution or absorption of heat
- Formation of a precipitate.
With reference to each of the above indications, state the external indication seen during – Addition of dilute acid to an active metal.
Give a balanced equation for a reaction involving the evolution of gas on the addition of dilute acid to sodium sulphite.
Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.
Zinc carbonate.
The changes in which new substance with new chemical properties are formed are ______.
Write the equation for the process of formation of rust.
How can we prevent rusting?
What is thermochemical reactions?
Write the effects of chemical reactions.
Collect information about the types of fuels used for cooking in your area. Discuss with your teachers/parents/others which fuels are less polluting and why.
