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प्रश्न
What is the difference between : An alkali and a metal hydroxide?
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उत्तर
| An alkali | Metal hydroxide |
| An alkali is a basic hydroxide which when dissolved in water produces hydroxyl (OH-) ions as the only negatively charged ions. | Metal hydrooxide are generally bases which have a metal atom bonded to a hydroxide ion (OH-) |
| Example : NaOH, KOH | Examples: Mg(OH)2 |
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संबंधित प्रश्न
Name an indicator which is pink in alkaline solution but turns colourless in acidic solution.
What happens during a wasp sting? What is its remedy?
Write any two important uses of bases.
What is the difference between an alkali and a base?
Classify the following solutions as acids, bases or salts.
Ammonium hydroxide, barium chloride, sodium chloride, sodium hydroxide, H2SO4 and HNO3
Give the name and formula of two : Non-volatile acids
Solution A is strong acid B weak acid C strong alkali.
Which solution contains solute molecules in addition to water molecules?
Complete the following table and write one equation for each to justify the statement:
|
Reactants |
Products |
Method |
|
Soluble base + Acid (dil) |
Salt + water |
Neutralisation Titration |
|
Metal + Non-metal |
Salt (soluble/insoluble) |
______ |
|
Insoluble base + ______ |
Salt (soluble) + water |
______ |
|
Active metal + Acid (dil) |
______ + ______ |
______ |
|
Soluble salt solution (A) + Soluble salt solution (B) |
Precipitated salt + Soluble salt |
______ |
|
Carbonate/bicarbonate + Acid (dil) |
Salt + ______ + ______ |
Decomposition of carbonate |
|
Chlorides/nitrates + Acid (conc.) |
______ + ______ |
Decomposition of chlorides and nitrates |
Match the chemical substances given in Column (A) with their appropriate application given in Column (B)
| Column (A) |
Column (B) |
| (A) Bleaching powder | (i) Preparation of glass |
| (B) Baking soda | (ii) Production of H2 and Cl2 |
| (C) Washing Soda | (iii) Decolourisation |
| (D) Sodium chloride | (iv) Antacid |
Which of the following is an acid-base indicator?
