Please select a subject first
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Write true or false
A heterogeneous mixture has a uniform composition throughout the mixture
Concept: undefined >> undefined
Match the columns.
| column A | column B |
|
1. to separate grain from chaff |
a. filtration |
| 2. to saparate sawdust from water | b. sedimentation and deeantation |
| 3. to separate iodine from sodium chloride | c. winnowing |
| 4. to separate iron fillings from sand | d.sublimation |
|
5. it is used to separate sand and water |
e maganetic separation |
|
|
f .handpicking |
Concept: undefined >> undefined
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Differentiate between the following.
Filter Paper and Alum
Concept: undefined >> undefined
Is food that we eat a mixture ?
Concept: undefined >> undefined
Name the technique that you use if only the solid component of a solution is required.
Concept: undefined >> undefined
Name the substance you will add to speed up sedimentation.
Concept: undefined >> undefined
What is the difference between a pure substance and a mixture ?
Concept: undefined >> undefined
What are the different types of mixtures ?
Concept: undefined >> undefined
Tick the most appropriate answer.
How many times is a proton heavier than an electron?
- 1500
- 1800
- 1840
- none of these
Concept: undefined >> undefined
Fill in the blank
In the type of reaction called ....................................., ions two compounds exchange their positive and negative radicals ions respectively.
Concept: undefined >> undefined
Explain the following type of chemical reaction, giving two examples for it:
Double displacement reaction
Concept: undefined >> undefined
Give one example for the following types of mixtures :
solid-liquid heterogenous mixture.
Concept: undefined >> undefined
Define: Compounds
Concept: undefined >> undefined
Give one example for the following types of mixtures :
misicible liquids
Concept: undefined >> undefined
Give one example for the following types of mixtures:
liquid-gas homogenous mixture
Concept: undefined >> undefined
Give Two Examples for Each of the Following: Non-metals
Concept: undefined >> undefined
Give Two Examples for Each of the Following: Metalloids
Concept: undefined >> undefined
Give Two Examples for Each of the Following: Inert Gases
Concept: undefined >> undefined
Differentiate between:
Homogenous and heterogenous substances
Concept: undefined >> undefined
Why is it necessary to separate the constituents of a mixture.
Concept: undefined >> undefined
