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प्रश्न
Give three reasons why – carbon dioxide is considered a compound, while carbon – an element.
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उत्तर
Carbon dioxide (C02) has a formula and properties of C02 to extinguish fire etc. are quite different from the properties it constituents carbon and oxygen. Oxygen (O) and carbon (C) are elements as these are made up of one kind of atoms. Also, carbon is combustible and oxygen is a supporter of combustion
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संबंधित प्रश्न
Define: Elements-
Give the names and symbols of five familiar substances which you think are elements.
State what a chemical formula denotes.
Match the symbols of – radicals – with their correct combining power or capacity, (valency).
(a) OH
(b) So4
(c) No3
(d) Co3
Combining power or capacity – A : 3; B : 2; C : 1. (negative valencies)
State the type of element for the following:
Calcium
Give the formula of the following gas:
Ammonia
State the valency of the following metallic element and write symbol with the valency
Potassium
State whether the following ion or radical given below of a non-metallic element exhibits valency: 1–, 2– or 3–. (write the ion or radical with the correct valency).
Permanganate
Fill in the blank with the correct word from the options given below:
A symbol represents a short form of a / an ________.
Define Alchemy.
