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प्रश्न
Give the names and formulae of two strong bases.
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उत्तर
- Sodium hydroxide (NaOH)
- Potassium hydroxide (KOH)
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संबंधित प्रश्न
Nitric acid turns red litmus blue.
Give the names and formulae of two strong acids.
Name one natural source of the following acid:
Oxalic acid
How will you test for the presence of this gas?
Why do HCl, H2SO4, HNO3, etc., show acidic character in aqueous solutions while solutions of compounds like C6H12O6 (glucose) and C2H5OH (alcohol) do not show acidic character?
Which acid is produced in our stomach? What happens if there is an excess of acid in the stomach? How can its effect be cured?
What happens when bases react with non-metal oxides? Explain with the help of an example. What does this reaction tell us about the nature of non-metal oxides?
Name an acid used in a drink.
Name an acid used as an eyewash.
What is the difference between an alkali and a base?
Give one example in the following case:
A hydrogen containing compound which is not an acid.
Choosing the correct words given in brackets, complete the sentence given below:
An acid is a compound which, when dissolved in water gives ______ ( hydronium / hydroxide) ions as the only ______ (positive/negative) ions.
Solution A is strong acid B weak acid C strong alkali.
Which solution contains solute molecules in addition to water molecules?
HCl, HNO3, C2H5OH, C6H12O6 all contain H atoms but only HCl and HNO3 show acidic character. Why?
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 |
State whether the following statement is true or false. Correct the false statement.
All substances are either acidic or basic.
Match the substances in Column I with those in Column II.
| Column 1 | Column II | ||
| (a) | Tartaric acid | (i) | soap |
| (b) | Calcium hydroxide | (ii) | curd |
| (c) | Formic acid | (iii) | unripe mangoes |
| (d) | Sodium hydroxide | (iv) | ant’s sting |
| (e) | Lactic acid | (v) | lime water |
Explain the following:
\[\ce{H3PO3}\] is not a tribasic acid.
Select an oxide which dissolves in water forming an acid.
