Neutralization Reaction – Class 7 Science

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A neutralization reaction is a chemical reaction in which an acid reacts with a base to form salt and water. During this reaction, the acidic and basic properties cancel each other, making the solution neutral.
General Equation:
Acid + Base → Salt + Water
Example:
Hydrochloric Acid (HCl) + Sodium Hydroxide (NaOH) → Sodium Chloride (NaCl) + Water (H₂O)
Everyday Uses of Neutralization:
Indigestion: Antacids neutralize excess acid in the stomach.
Ant Sting: Baking soda can be applied to neutralize the acid injected by ants.
Soil Treatment: Farmers add lime to acidic soil to improve crop growth.
Factory Waste: Neutralization helps treat acidic or basic industrial waste before disposal.

Créé par

Meenakshi Sharma

India

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Neutralization Reaction – Class 7 Science


Neutralization Reaction – Class 7 ScienceVersion en ligne A neutralization reaction is a chemical reaction in which an acid reacts with a base to form salt and water. During this reaction, the acidic and basic properties cancel each other, making the solution neutral. General Equation: Acid + Base → Salt + Water Example: Hydrochloric Acid (HCl) + Sodium Hydroxide (NaOH) → Sodium Chloride (NaCl) + Water (H₂O) Everyday Uses of Neutralization: Indigestion: Antacids neutralize excess acid in the stomach. Ant Sting: Baking soda can be applied to neutralize the acid injected by ants. Soil Treatment: Farmers add lime to acidic soil to improve crop growth. Factory Waste: Neutralization helps treat acidic or basic industrial waste before disposal. par Meenakshi Sharma 1 Aarav was stung by a bee. His friend applied a baking soda paste on the sting. Why did this help? a Baking soda is acidic b Baking soda neutralizes the acid in the bee sting c Baking soda increases the pain d Baking soda changes colour 2 A farmer found soil became acidic from nearby factory waste. Which of these should be added to the soil to make it less acidic? a Vinegar b Lemon juice c Lime (calcium carbonate) d Salt water 3 A student tested a liquid with blue litmus paper. The paper turned red. What does this tell you about the liquid? a The liquid is basic b The liquid is acidic c The liquid is neutral d The liquid is salty 4 Red litmus paper turns blue when dipped into a soap solution. What conclusion is best? a Soap solution is acidic b Soap solution is basic c Soap solution is neutral d Soap solution is salty 5 A student used litmus paper but saw no colour change. Which is the most complete explanation for why this might happen? a The substance may be neutral b The substance is acidic c The substance is basic d Its is showing the effect of all 6 Why can frequent consumption of soft drinks damage tooth enamel? a They contain proteins b They are acidic c They are basic d They contain vitamins 7 Aloe vera is commonly applied on sunburn because it: a Increases skin temperature b Soothes and cools the skin c Makes skin darker d Removes all skin cells 8 Read the observation: Observation with Red Litmus Turns blue Substance:Soap solution What conclusion can be drawn? a Soap solution is acidic b Soap solution is basic c Soap solution is neutral d Soap solution is salty 9 Which pair of substances will most likely neutralize each other when mixed? a Vinegar and baking soda b Vinegar and lemon juice c Baking soda and soap d Lemon juice and orange juice 10 A student rinses their mouth with water after drinking soda. How does this help protect tooth enamel? a Water adds more acid to the mouth b Water raises the pH toward neutral and reduces acid contact with enamel c Water permanently removes enamel so acid cannot damage it d Water converts acid into sugar

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Neutralization Reaction – Class 7 Science

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À propos de cette activité

Créé par

Téléchargez la version pour jouer sur papier

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Neutralization Reaction – Class 7 ScienceVersion en ligne

par Meenakshi Sharma

Aarav was stung by a bee. His friend applied a baking soda paste on the sting. Why did this help?

A farmer found soil became acidic from nearby factory waste. Which of these should be added to the soil to make it less acidic?

A student tested a liquid with blue litmus paper. The paper turned red. What does this tell you about the liquid?

Red litmus paper turns blue when dipped into a soap solution. What conclusion is best?

A student used litmus paper but saw no colour change. Which is the most complete explanation for why this might happen?

Why can frequent consumption of soft drinks damage tooth enamel?

Aloe vera is commonly applied on sunburn because it:

Read the observation: Observation with Red Litmus Turns blue Substance:Soap solution What conclusion can be drawn?

Which pair of substances will most likely neutralize each other when mixed?

A student rinses their mouth with water after drinking soda. How does this help protect tooth enamel?