Acids, Bases An...

In the table given below, match the bases in the first column with their applications mentioned in the second column.

A few drops of a colourless indicator are added to test tubes labelled as 'A' and 'B', each containing some colourless solution. The colour of the solution in the test tube 'A' turns pink on addition of the indicator, but no colour change is observed in the test tube 'B'. Which of the following is the correct combination of indicator and the solutions in the test tubes 'A' and 'B', respectively?

The solution of a strong acid is mixed with an equal amount of a solution of a strong base. The resultant mixture is then tested with a neutral litmus paper. What will be the colour change observed in the litmus paper?

Consider the following acids and choose the ones that are organic and can be used as flavouring agents:

1. Acetic acid
2. Sulphuric acid
3. Hydrochloric acid
4. Citric acid
5. Boric acid
6. Nitric acid

Observe the given reaction carefully and identify the name(s) of the product(s) formed in the reaction:

Why is effervescence observed when a drop of lemon juice or vinegar is added in a Petri dish containing baking soda?

Which of the following acids will form acid salts on reacting with equal moles of NaOH?

(i) HCl
(ii) HNO₃
(iii) H₂SO₄
(iv) H₃PO₄

Which of the following is TRUE for basic salts?

(i) Formed by partial replacement of hydroxyl groups
(ii) Formed by complete replacement of hydroxyl groups
(iii) Formed by incomplete neutralisation of a base
(iv) Formed by complete neutralisation of a base

If pH of a solution is 1.5, then what is the nature of the solution?

In which of the following solutions will a strip of cloth, soaked in onion juice, lose its odour when added to it?

What will be the products obtained when you put an iron nail into a test tube containing dilute sulphuric acid?

What is the effect of concentration of H⁺ ions on the nature of a solution?

Although salts are formed as a product of neutralisation reactions between an acid and a base, yet every salt solution is not neutral. In light of the given information, predict the correct option regarding the colour change shown by an aqueous solution of Fe₂(SO₄)₃ with different indicators.

Which of the following oxides, when dissolved in water, gives a solution which turns blue litmus red?

Which of the following statements are correct about an aqueous solution of an acid or a base having equal concentrations?

(i) Higher the pH, stronger the acid. (For pH < 7)
(ii) Higher the pH, weaker the acid. (For pH < 7)
(iii) Lower the pH, stronger the base. (For pH > 7)
(iv) Lower the pH, weaker the base. (For pH > 7)