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प्रश्न
Select the correct answer from the choice in the bracket.
The positively charged particle of an atom.
पर्याय
electron
proton
neturon
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उत्तर
proton
APPEARS IN
संबंधित प्रश्न
Define: Elements
Fill in the blan
An ________ is a homogeneous mixture of two or more metals.
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 |
Why is it necessary to separate the constituents of a mixture.
What are the advantages of chromatography?
Name: a Liquid Non-metal
Give two examples of the following.
Metals which are soft
Give reason: A frying pan is made up of steel but its handle is made up of wood.
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 metal which is a liquid at room temperature is _______.
Indicate whether the following statement is true or false:
Noble gases are high reactive
Tick (√) the correct alternative from the choice given for the following statement.
Sulphur and carbon are
Tick (√) the correct alternative from the choice given for the following statement
A gaseous non-metal.
Write the names of elements from the following symbol:
Zn
Represent with the help of a simple chart how matter is classified into pure or impure substances & further into elements, compounds & mixtures, with elements further segmented.
State why brass is considered as a homogenous mixture while a mixture of iron & sulphur – heterogenous.
Select the correct answer from the choice given below to complete the sentence :
Dust in air is an example of _________ mixture.
The first letter of an element is always written in ______ letter.
Matter is its simplest form is called ______.
