Advertisements
Advertisements
प्रश्न
Correct the following statement:
CO and Co both represents cobalt.
Advertisements
उत्तर
CO is a Carbon monoxide and Co is an element named Cobalt.
APPEARS IN
संबंधित प्रश्न
Tick the most appropriate answer
Solutions are
- heterogeneous mixtures.
- compounds
- homogeneous mixtures.
- elements
What is meant by H20 and 3H2O
Give reason: Argon is filled in electric bulbs.
Find the atomicity of the Following molecule:
Dinitrogen Oxide
Fill in the blank
A diatomic gaseous element is _______.
Fill in the blank
A liquid non-metal is _______.
Tick (√) the correct alternative from the choice given for the following statement.
Gold is used to make jewellery because
Tick (√) the correct alternative from the choice given for the following statement.
Sand is a compound of
Tick (√) the correct alternative from the choice given for the following statement
The hardest naturally occurring substance
The important physical properties of substances are colour, odour, nature, density & solubility in water.
Name – a gas with a pungent, choking odour which is lighter than air
Give the name of the radical - NO3
Write the names of elements from the following symbol:
Xe
State four differences between – elements, compounds and mixtures with suitable examples.
Select the correct answer to the statement given below:
A metalloid
The diagram represents fractional distillation for the separation of mixtures. Answer the following :

- Can two immiscible liquids be separated by this process?
- Separation of liquids by this process is based on which physical property?
- If methyl alcohol & water are to be separated, which liquid would remain in flask ‘X’ after condensation.
- Give a reason for the above answer.
- State the purpose of the fractionating column in the apparatus.
Atoms: Fundamental particle of an element::______ : Fundamental particles of a compound.
Water contains _____ and _____ element.
Give an example of each mixture having the following characteristics. Suggest a suitable method to separate the components of this mixture
Two or more coloured constituents are soluble in some solvent.
______ is a mixture of gases.
