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प्रश्न
Select the correct answer to the statement given below:
The chemical name for dinitrogen oxide [N20].
पर्याय
Chalk
Oxygen
Silicon
Bromine
Nitrous oxide
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उत्तर
Nitrous oxide
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संबंधित प्रश्न
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 |
Define the term: Element
Give one example for the following types of mixtures :
misicible liquids
Give two examples of Non-metals.
Name: Two substances used to make electric wires
Name A substance used as an insulator.
Give reason: A frying pan is made up of steel but its handle is made up of wood.
Find the atomicity of the Following molecule:
Aluminium Suiphide
Tick (√) the correct alternative from the choice given for the following statement.
All pure substances have
Give the name of the radical - SO4
Write the names of elements from the following symbol:
Br
Write the names of elements from the following symbol:
Cu
Select the correct answer to the statement given below:
A compound containing carbon, oxygen and calcium.
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 diatomic molecule.
Select the correct answer from the choice given below to complete the sentence :
An example of a monoatomic molecule is ___________.
Atoms: Fundamental particle of an element::______ : Fundamental particles of a compound.
Classify the following as metals, non-metals and metalloids.
Sodium, Bismuth, Silver, Nitrogen, Silicon, Carbon, Chlorine, Iron, Copper
Differentiate metals and non-metals.
Assertion: Air is a mixture of elements only.
Reason: Only nitrogen, oxygen and neon gases exist in air.
