Question : If 4 litres of water is evaporated on boiling from 12 litres of salt solution containing 7 percent salt, the percentage of salt in the remaining solution is:

Option 1: 10.5%

Option 2: 11.5%

Option 3: 12%

Option 4: 13%

Question : Which of the following options are homogeneous mixtures?

Option 1: Solution, colloid, suspension, milk, toothpaste, salt water and brass

Option 2: The solution, salt water and Brass

Option 3: Solution, Colloid, Milk, Toothpaste, Saltwater, and Brass

Option 4: Colloid, suspension, milk and toothpaste

Question : Which one of the following can be categorised as a solution?

Option 1: Salt

Option 2: Diamond

Option 3: Sea Water

Option 4: Coal

Question : A place where there is constant intermingling of salt water and fresh water is ____

Option 1: Estuary 

Option 2: Delta

Option 3: Gulf

Option 4: Bay

Question : 8 litres of water is added to 32 litres of a solution containing 20% alcohol in water. What is the approximate concentration of alcohol in the solution now?

Option 1: 24%

Option 2: 16%

Option 3: 8%

Option 4: 12%