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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
Write the missing reactants and products and balance the equations.
NaOH + ............... `→` NaCI + ...................
What are biocatalysts ?
Write true or false :
Hydrogen sulphide has rotten egg smell .
State what you would observe when the following substance is heated in a glass test tube red lead.
Give an example of the following chemical change.
Two gases combine to form white solid
Distinguish by heating the following in dry test tubs.
Zinc carbonate, Copper carbonate and lead carbonate.
Arrange the following statements in correct sequence:
- One side is water-loving and other water-hating molecules.
- When you agitate the cloth, the dirt is surrounded by many molecules and taken away from the cloth.
- The dirt surrounded by the detergent molecules floats in the water making it dirty.
- Finally, the cloth is clean.
- The detergent molecules have two sides.
- Water hating goes and joins with dirt and oil in the cloth while the water-loving joins with the water molecules.
Classify the following processes into physical or chemical changes:
- Beating of aluminium metal to make aluminium foil.
- Digestion of food.
- Cutting of a log of wood into pieces.
- Burning of crackers.
Explain how the painting of an iron gate prevents it from rusting.
______ is the chemical name of slaked lime.
