Advertisements
Advertisements
Question
What's the solution?
We need to make a sherbet quickly for some guests. But we only have sugar candy in the house.
Solution
We can pound sugar candy into a fine powder. When the powder is fine, it will quickly dissolve in water. Therefore, we can make sherbet quickly.
RELATED QUESTIONS
All kinds of matter
Explain why steel is used to make railway lines.
Define matter. Give four examples of matter.
Fill in the following blanks with suitable words :
An element is made up of only one kind of ........
Classify the following into elements and compounds :
- H2O
- He
- Cl2
- CO
- Co
One of the following substances is neither a good conductor of electricity nor an insulator. This substance is :
Which one of the following is not a metalloid ?
Classify the following into solutions, suspensions and colloids :
Soda-water, Milk, Brine, Blood, Ink, Smoke in air, Chalk water mixture, Milk of Magnesia, Shaving cream, Muddy river water.
When the solid A is added to water, it dissolves with the evolution of a lot of heat and making little explosions to form two products B and C. The properties of products B and C are entirely different from those of solid A as well as water. Moreover, products B and C cannot be reconverted into solid A and water. When another solid D is added to water, it dissolves with the absorption of a little heat to form a product E which cools down. The product E shows the properties of both, solid D as well as water. Moreover, product E can be converted into solid D and water.
(a) What type of change occurs when solid A is dissolved in water ? Why ?
(b) What type of change occurs when solid D is dissolved in water ? Why ?
(c) Name a metal which you think could behave like solid A. Also name the products B and C.
(d) Name the solid D if it is the one which is used in making ordinary dry cells.
(e) Name the process by which D can be recovered from E.
Fill in the following blanks with suitable words :
The separation of liquids by fractional distillation is based on the difference in their .....................