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प्रश्न
Fill in the blan
An ________ is a homogeneous mixture of two or more metals.
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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
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 |
Name the technique that you use if only the solid component of a solution is required.
Name the substance you will add to speed up sedimentation.
What is the difference between a pure substance and a mixture ?
Give Two Examples for Each of the Following: Non-metals
Why is it necessary to separate the constituents of a mixture.
Write the Chemical Name of the Following and Also Give Their Molecular Formulae:
Sand
Name: a Liquid Metal
How is sodium chloride different from its constituent elements, sodium and chlorine in its properties? Justify.
Define: Atom
Indicate whether the following statement is true or false:
Molecules combine to form atoms
The important physical properties of substances are colour, odour, nature, density & solubility in water.
Name - a poisonous gas almost as heavy as air.
Complete the statement with the correct words.
__________ are chemicals formed on reaction of a base with an _____ giving salt and water.
Select the correct answer from the choice given below.
The unreactive non-metallic element
Explain the difference between Metals and non-metals.
‘An atom is the basic unit of an element’. Draw a diagram of an atom – divisible as seen today.
Select the correct answer from A, B, C, D & E for the statement given below :
A non-metal that is lustrous.
Atoms: Fundamental particle of an element::______ : Fundamental particles of a compound.
Higher-Order Thinking questions:
Why is hydrogen considered an element?
Name the element which is used in toothpaste to strengthen our teeth.
