How do we distinguish between acids and bases using an olfactory indicator?
Important Questions on Acids, Bases and Salts
You have been given three test tubes. One of them has distilled water and of the remaining two, one has acid and the second has a basic solution. If you only have red litmus paper then how will you identify the nature of solutions in each of the test tubes?
During an experiment, Neelam and Manish added concentrated sulphuric acid to dry (anhydrous) sodium chloride. A gas evolved during the reaction. When Manish placed a dry blue litmus paper near the mouth of the test tube nothing happened but when he placed a moist blue litmus paper, it became red. Explain why.
Some substances and their values are given in the table. Analyse the data in the table and answer the following question:
| Substance | value |
| A solution of baking soda | |
| Lemon juice | |
| Vinegar | |
| Sodium hydroxide solution | |
| water |
Which of the substances are basic in nature?
Some substances and their pH values are given in the table. Analyse the data in the table and answer the following question:
| Substance | value |
| A solution of baking soda | |
| Lemon juice | |
| Vinegar | |
| Sodium hydroxide solution | |
| water |
Which of the substances are acidic in nature?
Some substances and their pH values are given in the table. Analyse the data in the table and answer the following question:
| Substance | pH value |
| A solution of baking soda | |
| Lemon juice | |
| Vinegar | |
| Sodium hydroxide solution | |
| water |
Which of the substances are neutral?
Acids "A" and "B" were taken in two beakers. Acid "A" ionises partially in water while acid "B" ionises completely. On this basis, tell:
Which among "A" and "B" is strong acid and which is weak?
Acids "A" and "B" were taken in two beakers. Acid "A" ionises partially in water while acid "B" ionises completely. On this basis, tell:
What is a weak acid?
