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प्रश्न
Define the following term:
Chemical change
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उत्तर
A chemical change is a permanent change in which the chemical composition of a substance is changed and one or more new substances with different chemical compositions and different properties are formed.
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संबंधित प्रश्न
Complete and balance the following chemical equations:
Zn + `"H"_2"SO"_4` `→`
(dil)
Differentiate between in Chemical reaction and chemical equation.
Complete the statement by filling the gaps using appropriate term from the terms given in the bracket.
(slow, coloured, arrow, fast, smell, milky, physical, product, chemical, reactant, covalent, ionic, octet, duplet, exchange, sharing, equality sign)
The spoiling of food is a chemical change which is recognized from the generation of certain ______ due to it.
When hydrogen burns in oxygen, water is formed; when electricity is passed through water, hydrogen and oxygen are given out. Name the type of chemical change involved in the two cases.
State the original colour of the following substance and colour of residue obtained after heating.
Copper carbonate
State the following reaction represent oxidation or reduction.
\[\ce{Ag->Ag+}\]
State whether the following reaction is oxidation or reduction.
\[\ce{Na->Na+}\]
Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.
Zinc carbonate.
Burning of paper is the best example of ______ change.
The chemical name of baking soda is sodium bicarbonate.
