Advertisements
Advertisements
Question
Fill in the blank
Chalk powder dissolved in water is an example of a Chalk powder dissolved in water is an example of a _________.
Advertisements
Solution
Chalk powder dissolved in water is an example of a Chalk powder dissolved in water is an example of a suspension.
APPEARS IN
RELATED QUESTIONS
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 |
Name the substance you will add to speed up sedimentation.
Differentiate between:
Homogenous and heterogenous substances
State four differences between compounds and mixtures.
Indicate whether the following statement is true or false:
A compound is made up of just one kind of atom
Indicate whether the following statement is true or false:
All elements are artificially prepared
Complete the statement with the correct words.
_______ are chemicals which are hydroxide (or oxides) of ______ eg. sodium hydroxide.
Complete the statement given below by filling in the blank with the correct word.
An element is a pure substance which cannot be broken down by physical or _________ methods.
Select the correct answer from the choice given below.
The negatively charged particles in an atom
Select the correct answer from the choice given below.
The element which is malleable
Select the correct answer from the choice in the bracket.
The least reactive metal.
With reference to elements – define the term ‘molecule’. Give two examples each of a monoatomic, diatomic & polyatomic molecule.
Select the correct answer from A, B, C, D & E for the statement given below :
A metalloid.
Select the correct answer from the choice given below to complete the sentence :
Compounds are ____________ in nature.
Non-metal conducting electricity :______ :: Metal conducting electricity : Copper
Higher Order Thinking Skills.
In the diagram given below, the circle, square and triangle represent the atoms of different elements.

Identify all combinations that represent
- molecule of a compound
- molecule of an element consisting of two atoms
- molecule of an element consisting of three atoms
Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.
Name a non-metal which is required for combustion.
Classify the substances given in Fig. 2.2 into elements and compounds

