Question : In a mixture of 25 litres, the ratio of acid to water is 4 : 1. Another 3 litres of water is added. The ratio of acid to water in the new mixture is:

Option 1: 5 : 2

Option 2: 2 : 5

Option 3: 3 : 5

Option 4: 5 : 3

Question : A vessel is filled with liquid, 3 parts of which are water and 5 parts syrup. How much of the mixture must be drawn off and replaced with water so that the mixture may be half water and half syrup?

Option 1: $\frac{1}{3}$

Option 2: $\frac{1}{4}$

Option 3: $\frac{1}{5}$

Option 4: $\frac{1}{7}$

Question : Vinegar made by fermentation from cane sugar contains:

Option 1: Palmitic acid

Option 2: Lactic acid

Option 3: Citric acid

Option 4: Acetic acid

Question : The acid used in lead storage cells is:

Option 1: Phosphoric acid

Option 2: Hydrochloric acid

Option 3: Nitric acid

Option 4: Sulphuric acid

Question : The ratio of acid and water in the three samples is 2 : 1, 3 : 2, and 5 : 3. A mixture containing equal quantities of all three samples is made. The ratio of acid and water in the mixture is:

Option 1: 120 : 133

Option 2: 227 : 133

Option 3: 227 : 120

Option 4: 133 : 227