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प्रश्न
Elements : Combine to form compounds :: Compounds : ______.
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उत्तर
Elements: Combine to form compounds:: Compounds: can be split into elements
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संबंधित प्रश्न
Define mixture.
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: the Hardest Naturally Occurring Substance
Fill in the blank
The most abundant element in the earth’s crust is _______.
State what are radicals. Give the names of the radicals –
(a) NO3
(b) OH
(c) SO4
(d) CO3
Complete the statement given below by filling in the blanks with the correct words.
Atom contains ________ , with positively charged _____.
Select the correct answer from A, B, C, D & E for the statement given below :
A mixture consisting of elements & a compound.
Atoms: Fundamental particle of an element::______ : Fundamental particles of a compound.
Classify the substances given in Fig. 2.2 into elements and compounds
