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| what is a chemical reaction? |
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Definition
| Any chemical change in matter which involves transformation into one or more substances with entirely different properties called a chemical properties is a chemical reaction |
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Term
| what happens during a chemical reaction? |
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Definition
| a chemical reaction involves breaking of chemical bonds between the atoms or group of atoms of reacting substances and rearrangement of atoms making new bonds to form new substances with absorption or release of energy |
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Definition
| a chemical bond is the attractive force that holds the atoms of a molecule together in a compound |
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| how are chemical reactions represented? |
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Definition
| chemical reactions are represented by chemical equations.the substance taking part in a reaction are called reactants and the new substances formed are called products |
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Term
sodium hydroxide reacts with dilute hydrochloric acid to form ?
also represent it |
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Definition
| sodium hydroxide reacts with dilute hydrochloric acid to form salt and water .[image] |
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Term
| what are the characteristics of a chemical reaction? |
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Definition
| The characteristics of a chemical reaction are: Evolution of gas, Formation of a precipitate, Change in colour, Change in temperature, Change in state |
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Definition
| Effervescence is the formation of gas bubbles in a liquid by a chemical reaction. An example of effervescence is the release of carbon dioxide which bubbles as a gas from the liquid when limestone chips, which are composed of calcium carbonate, are added to dilute hydrochloric acid. |
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Term
| what happens when zinc reacts with dilute sulphuric acid? |
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Definition
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Term
| what happens when potassium chlorate is heated strongly ? |
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Definition
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Term
| what happens when sodium sulphite is treated with dilute hydrochloric acid? |
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Definition
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Definition
| change in colour examples |
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Term
| what will happen if we put a few pieces of iron are dipped into a blue coloured copper sulphate solution? |
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Definition
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Term
| what will happen when blue coloured copper sulphate reacts with hydrogen sulphide gas? |
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Definition
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Term
| what happens if solid lead nitrate is heated ? |
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Definition
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Definition
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Definition
| change in precipitate examples |
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Term
| what will happen if a solution of silver nitrate is added to solution or sodium chloride ? |
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Definition
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Term
| what happens when ferrous sulphate solution is added to sodium hydroxide solution ? |
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| what will happen if we add a few drop of dilute sulphuric acid is added to barium chloride solution? |
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