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प्रश्न
Give two examples for the following case:
Chemical changes
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उत्तर
- Burning of paper
- Curdling of milk
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संबंधित प्रश्न
The gas we use in the kitchen is called liquefied petroleum gas (LPG). In the cylinder, it exists as a liquid. When it comes out from the cylinder it becomes a gas (Change − A), then it burns (Change − B). The following statements pertain to these changes. Choose the correct one.
Write the missing reactants and products and balance the equations.
\[\ce{KClO3 ->[heat]}\] ___________+ ____________
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 white particles of baking soda disappear when put in lemon juice. This means that it is a ______ change.
Write the chemical reaction where the following changes are observed.
Gas is evolved
Explain,giving one example of the following chemical changes:
Reversible reaction
Silver metal can displace hydrogen gas from nitric acid.
Chemists identify gypsum as a natural indicator.
The chemical name of baking soda is sodium bicarbonate.
Write the equation for the process of formation of rust.
When milk is mixed with coffee decoction, the colour of milk and decoction changes due to ______.
