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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 |
Give Two Examples for Each of the Following: Non-metals
Define a pure substance. How many types of pure substances do you know?
Give two examples of Metalloids.
State the number of atoms of each element, present in \[\ce{HNO3}\].
Also name the compound.
Give one use of the following substance:
Coal
Give reason: Graphite is used to make a lead of the pencils.
Answer the following question:
What do you understand by the statement: ‘metals are ductile and malleable’?
Fill in the blank
_________ refers to the number of atoms in the molecule of an element
Fill in the blank
A liquid non-metal is _______.
Indicate whether the following statement is true or false:
All elements are artificially prepared
Tick (√) the correct alternative from the choice given for the following statement.
All pure substances have
The important physical properties of substances are colour, odour, nature, density & solubility in water.
Name – two coloured gases (with their colours)
Select the correct answer from the choice given below.
An impure substance
Who are my companions?
| Group 'A' | Group 'B' |
| 1. Stainless steel | (a) Non-metal |
| 2. Silver | (b) compound |
| 3. Bhajani mixture for milling | (c) Mixture |
| 4. Salt | (d) Element |
| 5. Coal | (e) Alloy |
| 6. Hydrogen | (f) Metal |
Write the names of elements from the following symbol:
Zn
Write the names of elements from the following symbol:
Xe
Write the names of elements from the following symbol:
Ti
State why brass is considered as a homogenous mixture while a mixture of iron & sulphur – heterogenous.
