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प्रश्न
Write your observation for the following chemical reaction and name the product formed :
When dilute acetic acid is poured on baking soda.
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उत्तर
Sodium acetate, CO2 and water is formed.
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संबंधित प्रश्न
Methyl orange is used as an indicator. It shows colour change in acid, base and neutral substance. Tabulate your result as follows:
| Indicator | Colour change | Inference |
| Methyl Orange | No change | ...................... |
| .................... | Acid | |
| Yellow | ....................... |
How will you indicate the following effect in a chemical equation?
A solution made in water.
When water is added gradually to a white solid X, a hissing sound is heard and a lot of heat is produced forming a product Y. A suspension of Y in water is applied to the walls of a house during white washing. A clear solution of Y is also used for testing carbon dioxide gas in the laboratory.
- What could be solid X? Write its chemical formula.
- What could be product Y? Write its chemical formula.
- What is the common name of the solution of Y which is used for testing carbon dioxide gas?
- Write chemical equation of the reaction which takes place on adding water to solid X.
- Which characteristic of chemical reactions is illustrated by this example?
Explain the following reaction with one suitable example .
Decomposition reaction
Write the chemical equation for the following word equation and balance them.
Calcium + Nitrogen → Calcium nitride
In certain reaction a change of state is observed i.e. solid to liquid, liquid to gas etc. – State the change of state of the products – to give the respective reactant.
2H2 + O2 → 2H2O
Give one example in the case where supplying energy [given below] is necessary for a chemical reaction.
Pressure
Give one example in the case where supplying energy [given below] is necessary for a chemical reaction.
Catalyst
Balance the following simple equation:
N2 + O2 ⇌ NO
Balance the following simple equation:
K + H2O → KOH + H2
