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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
What are (i) positive catalysts and (ii) negative catalysts? Support your answer with one example for each of them.
TRUE \ FALSE
Copper can displace iron from iron sulphate.
Define electrolysis.
Fill in the blank.
Melting of ice is a _______ change.
Fill in the blank
A new substance is formed in a _______ change.
State what you would observe when the following substance is heated in a glass test tube red lead.
Complete the statement by filling the gap using an 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)
An ______ is drawn in between the reactants and products while writing the equation for a chemical reaction.
Write the chemical reaction where the following changes are observed.
Colour change is noticed
Distinguish by dilute sulphuric acid.
Sodium Sulphite and sodium carbonate?
Select the correct answer for the following options:
The basic gas obtained when two gases react in presence of a catalyst and the reaction is exothermic.
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- 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.
State whether the following reaction is oxidation or reduction.
\[\ce{Na->Na+}\]
Select the correct answer from the options given below:
State the gaseous product formed, when
An ammonium salt reacts with an alkali.
NPK are the primary nutrients for plants.
The chemical change is ______.
Which of the following are chemical changes?
(i) Decaying of wood
(ii) Burning of wood
(iii) Sawing of wood
(iv) Hammering of a nail into a piece of wood
If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
Can you change rust back into iron by some simple method?
Galvanization is a process in which ______ is coated as a layer of iron.
Magnesium + oxygen → magnesium oxide.
2Mg + O2 → 2Mg O
When carbon dioxide is passed through lime water ______.
