Advertisements
Advertisements
प्रश्न
Give one use of the following substance:
Iron
Advertisements
उत्तर
Iron : To make machines tools and building material.
APPEARS IN
संबंधित प्रश्न
Tick the most appropriate answer.
The constituents of a mixture are present in
- a fixed ratio
- a variable ratio,
- the ratio of 2: 1
- none of these
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 |
Differentiate between the following.
Filter Paper and Alum
Mention three gaseous elements and write their molecular formulae
Answer the following question:
What do you understand by the statement: ‘metals are ductile and malleable’?
Indicate whether the following statement is true or false:
A compound is made up of just one kind of atom
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 unreactive non-metallic element
Give a reason for the following statement :
Brass & bronze are examples of mixtures, while copper sulphate & lead nitrate are examples of compounds.
Differentiate metals and non-metals.
