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प्रश्न
Complete the statement by filling the gap using an 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)
An ______ is drawn in between the reactants and products while writing the equation for a chemical reaction.
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उत्तर
An arrow is drawn in between the reactants and products while writing the equation for a chemical reaction.
संबंधित प्रश्न
The chemical name of baking soda is ______.
Give reason .
A person suffering from acidity is advised to take an antacid.
FILL IN THE BLANK
In a double decomposition precipitation reaction both the reactants must be ............ soluble.
True or false
New substances are formed in a chemical change.
Complete the table given below.
| Heat on copper carbonate | Test for gas evolved |
Complete the table given below.
| Flame test for calcium chloride | Acid used for flame test |
Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.
Zinc carbonate.
Classify each of the following, as a physical or a chemical change. Give reasons.
(a) Drying of a shirt in the sun.
(b) Rising of hot air over a radiator.
(c) Burning of kerosene in a lantern.
(d) Change the colour of black tea by adding lemon juice to it.
(e) Churning of milk cream to get butter.
Give an example where heat, light, and sound are produced during a chemical change.
______ is the chemical name of rust.
