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प्रश्न
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.
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उत्तर
The spoiling of food is a chemical change which is recognized from the generation of certain smell due to it.
संबंधित प्रश्न
Changes in which new substances are formed are called ______ changes.
How do the following help in bringing about a chemical change?
catalyst .
FILL IN THE BLANK
In a double decomposition precipitation reaction both the reactants must be ............ soluble.
State what you would observe when the following substance is heated in a glass test tube red lead.
Explain the term reactant and product giving examples.
Give a chemical test to distinguish between the following gases.
NH3 and HCl
Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.
Lead nitrate.
Chemical change is a temporary change.
Match the following:
| Column I | Column II | ||
| 1. | Burning of coal | a. | Rusting |
| 2. | Painting of a surface | b. | Evaporation |
| 3. | Dipping iron in the water | c. | Chemical change |
| 4. | Salt from seawater | d. | Prevention of rusting |
What is the difference between reactants and products?
