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प्रश्न
Fill in the blan
An ________ is a homogeneous mixture of two or more metals.
उत्तर १
An alloy is a homogeneous mixture of two or more metals.
उत्तर २
An alloy is a homogeneous mixture of two or more metals.
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संबंधित प्रश्न
Fill in the blank
Use of a ................. to separate the components of a mixture of solids is based on the difference in the size of the components
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 |
Write the Chemical Name of the Following and Also Give Their Molecular Formulae:
Vinegar
Name: an Inert Gas
Define: Atomicity
Give one use of the following substance:
Iron
Fill in the blank
The most abundant element in the earth’s crust is _______.
Fill in the blank
The most abundant element in the atmosphere is _______.
Indicate whether the following statement is true or false:
Metals reflect light and are good conductors of electricity
Differentiate between the terms –
elements, compounds & mixtures.
Draw a labelled diagram of an atom including its nucleus, orbits & their contents.
Select the correct answer from the choice given below.
An element which is a poor conductor of heat
Write the names of elements from the following symbol:
Cd
Write the names of elements from the following symbol:
Si
Explain the term ‘mixture’.
Give an example of two liquids which form homogenous.
Select the correct answer from the choice given below to complete the sentence :
An example of a monoatomic molecule is ___________.
Name the constituents of water.
Reason out
Elements are called semimetals.
