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प्रश्न
Answer the following:
What is corrosion? Do gold ornaments corrode? Justify.
उत्तर
- The slow process of decay or destruction of a metal due to the effect of air, moisture and acids on it is known as corrosion.
- No, gold ornaments do not corrode bacause gold is a noble metal (inert) and thus, it does not react with acids, moisture and air.
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संबंधित प्रश्न
After you have dinner tonight, wash your own plates with soap/detergent.
- What colour change is observed when soap/detergent is applied?
- Name the type of reaction and explain it.
Describe the process of neutralization with the help of an example.
Fill in the blank.
The reaction between an acid and a base is called ..................
Define neutralization.
What do you observe when an acid is added to a basic solution.
FILL IN THE BLANK
In a .............reaction, an acid reacts with a base to form salt and water as the only products.
Which substances are produced by the neutralization process?
Classify the following substances into Acidic, Basic, and Neutral groups.
HCl, NaCl, MgO, KCl, CaO, H2SO4, HNO3, H2O, Na2CO3
Answer the following question:
Grills of doors and windows are always painted before they are used? Give reason.
Explain the neutralization reactions in our daily life.
Products of a neutralisation reaction are always
A neutralisation reaction is a
Look at the given reaction.
Hydrochloric acid + Sodium hydroxide (base) → Sodium chloride (salt) + Water
Sodium chloride formed in this reaction remains in
solution form. Can we get solid sodium chloride from this solution? Suggest a method (if any).
Form a sentence using the following words – baking soda, ant bite, moist, effect, neutralised, rubbing.
Assertion: To neutralize the excess acid formed in the stomach, milk of magnesia is taken.
Reason: Milk of magnesia contains a base called magnesium hydroxide.
Write a note on:
Wasp bite
