Advertisements
Advertisements
Question
What is the difference between an alkali and a base?
Advertisements
Solution
An alkali and a base:
1. Alkalis are soluble in water whereas bases may be or may not be soluble in water.
2. All alkalis are bases but all bases are not alkalis.
RELATED QUESTIONS
Give the names and formulae of two strong bases and two weak bases.
Write the neutralisation reaction between acids and bases in terms of the ions involved.
Give two examples of the following:
hydracids
Give a balanced equation for reaction of nitrogen dioxide with water.
Name an acid used as an eyewash.
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 |
Fill in the cross word given in figure with the help of the clues provided.
Across
(2) The solution which does not change the colour of either red or blue litmus.
(4) Phenolphthalein gives pink colour in this type of solution.
(7) Colour of blue litmus in lemon juice.
Down
(1) It is used to test whether a substance is acidic or basic.
(3) It is a natural indicator and gives pink colour in basic solution.
(5) Nature of ant’s sting.
(6) It is responsible for the increase in temperature during a neutralisation reaction.
______ contain one or more replaceable hydrogen atoms.
Complete the following equation.
CaO + H2SO4 → ______ + H2O
Bring the soil sample of your area, find out if it is acidic, basic or neutral. Discuss with farmers if they treat the soil in any manner.
