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प्रश्न
Write your observation for the following chemical reaction and name the product formed:
When sugar is heated.
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उत्तर
When sugar is heated, a black solid mass (charcoal) is formed along with water vapours.
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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 | ....................... |
Translate the following statement into a chemical equation and then balance it.
Potassium metal reacts with water to give potassium hydroxide and hydrogen gas.
Balance the following chemical equation:
\[\ce{NH3 -> N2 + H2}\]
Name the type of chemical reaction shown by the following equation:
2Mg+ O2 → 2MgO
Write down what you understood from the following chemical reaction.
AgNO3(aq) + NaCI(aq) → AgCI ↓ + NaNO3(aq)
What is a chemical equation? Why it is necessary to balance it?
Write the chemical equation for the following word equation and balance them.
Carbon + Oxygen → Carbon dioxide
(a) Give only one suitable chemical test to identify the following gases.
- Ammonia
- Sulphur dioxide
- Hydrogen Chloride
- Chlorine
- Carbon Dioxide
- Oxygen
- Hydrogen
(b) Select a basic gas mentioned in Q.1 (a). How is the basic nature suspected?
(c)Select acidic gases from the gases mentioned in Q.1 (a). How is the acidic nature suspected?
(d) State the gas responsible for bleaching action.
(e)Which gas turn blue cobalt chloride paper light pink?
Write the name and molecular formula of a carbon compound having its name suffixed with "-ol" and having two carbon atoms in its molecule. With the help of a chemical equation indicate what happens when this compound is heated with excess conc. H2SO4.
Give one example in the case where supplying energy [given below] is necessary for a chemical reaction.
Electrical energy
