Behaviour of Different Substances in Water

Q. A water sample contains 9.5% MgCl2 and 11.7% NaCl by weight . Assume 80% ionization of each salt . B oiling point is point .52

Q. Ramu wants to separate things based on their solubility in water. Identify the pair of substances containing one soluble and one insoluble substance.

1. Soap and Pepper
2. Salt and Lemon juice
3. Sugar and Salt
4. Chalk powder and sand

Q.

What happens when you mix sugar in water?

1. Sugar settles at the top of jar

2. Sugar settles in the middle of jar

3. Sugar dissolves in water

4. Sugar settles at the bottom of jar

Q.

3. When milk or glycerine is added to water they disappear? What does this mean?

Q. In the treatment of water, solid impurities are allowed to settle to the bottom. This particular stage in the entire purification is called________.

1. chlorination
2. sublimation
3. sedimentation
4. distillation

Q. Salt disappears into air when we mix it into water.

1. True
2. False

Q. Arrange the steps involved in preparation of pickles.
(First one on top)

1. Add salt and oil
2. Store in dry jar
3. Mix them well
4. Cut raw mango

Q.

Only soluble substances can form a solution

1. True
2. False

Q. What happens to the taste of the salt crystals if salt is mixed with sand?

1. Turns spicy
2. Turns sweet
3. Doesn't change
4. Turns sour

Q. Which among the following forms a solution, when mixed with water?

1. Kerosene
2. Chalk powder
3. Sugar
4. Tea leaves

Q. How would you infer that a chocolate is spoiled?

1. Chocolate hardens
2. Slimy layer
3. White film
4. Green film

Q. 35. What is frictional cristilisation which type of mixture can be separated by this method

Q. Does that mean that the water does not have salt? If it has, then where is the salt?

Q. Which jar is suitable for filling pickles?

1. Jar without moisture
   
   
2. Jar with moisture
   
   

Q. When salt is dissolved in water, it forms a

1. solvent
2. solute
3. solution

Q. Common salt is insoluble in water.

1. False
2. True

Q.

___ means to get completely mixed into a liquid to form a solution.

1. Stay still

2. Double in size

3. Dissolve

4. Turn water sweet

Q. What will be the residue left on the watch glass on heating blue ink in it ?

Q. Arrange the steps involved in preparation of pickles.
(First one on top)

1. Add salt and oil
2. Store in dry jar
3. Mix them well
4. Cut raw mango

Q.

Salt particles ____ when added in water and mixed.

1. dissolve

2. stay still

3. turn the water sweet

4. double in size

Q. when we add 10 parts of corn flour in 1 part of water it becomes a solution.But if we hit the solution very hard it does not splash out why ?