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प्रश्न
Select the correct answer to the statement given below:
A non-metal which exists in the liquid state.
पर्याय
Chalk
Oxygen
Silicon
Bromine
Nitrous oxide
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उत्तर
Bromine
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संबंधित प्रश्न
Classify the following substances into compounds and mixtures:
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
Name the technique that you use if only the solid component of a solution is required.
Tick the most appropriate answer.
How many times is a proton heavier than an electron?
- 1500
- 1800
- 1840
- none of these
Give one example for the following types of mixtures:
liquid-gas homogenous mixture
Name: a Metal Which is brittle
Define a pure substance. How many types of pure substances do you know?
Give two examples of non-metals.
Give two examples of the following.
Metals which are soft
Find the atomicity of the Following molecule:
Dinitrogen Oxide
Fill in the blank
_________ refers to the number of atoms in the molecule of an element
Complete the statement given below by filling in the blank with the correct word.
The basic unit of an element is an __________.
Define the term ‘compound’. In the compound carbon dioxide – the elements carbon & oxygen are combined in a fixed ratio. Explain.
State why brass is considered as a homogenous mixture while a mixture of iron & sulphur – heterogenous.
Select the correct answer from A, B, C, D & E for the statement given below :
A non-metal that is lustrous.
Why are utensils made up of aluminium and brass?
Give two example of elements.
How are elements classified?
