Advertisements
Advertisements
प्रश्न
What is the action of water on sodium? Write the equation of the chemical reaction involved.
Advertisements
उत्तर
Sodium reacts vigorously with cold water, forming sodium hydroxide and hydrogen gas.
\[\ce{\underset{Sodium}{2Na_{(s)}} + \underset{(Cold)}{\underset{Water}{2H2O_{(l)}}} -> \underset{Sodium hydroxide}{2NaOH_{(aq)}} + \underset{Hydrogen}{H2_{(g)}} + Heat}\]
APPEARS IN
संबंधित प्रश्न
Samples of four metals A, B, C and D were taken and added to the following solution one by one. The results obtained have been tabulated as follows.
| Metal | Iron (II) sulphate | Cooper (II) sulphate | Zinc sulphate | Silver nitrate |
| A | No reaction | Displacement | ||
| B | Displacement | No reaction | ||
| C | No reaction | No reaction | No reaction | Displacement |
| D | No reaction | No reaction | No reaction | No reaction |
Use the Table above to answer the following questions about metals A, B, C and D.
- Which is the most reactive metal?
- What would you observe if B is added to a solution of copper (II) sulphate?
- Arrange the metals A, B, C and D in the order of decreasing reactivity.
Food cans are coated with tin and not with zinc because ______.
Give reasons why copper is used to make hot water tanks and not steel (an alloy of iron).
A copper coin is kept immersed in a solution of silver nitrate for some time. What will happen to the coin and the colour of the solution?
How would you show that silver is chemically less reactive than copper?
With the help of examples, describe how metal oxides differ from non-metal oxides.
What happens when calcium reacts with chlorine? Write an equation for the reaction which takes place.
Arrange the following metals in order of their chemical reactivity, placing the most reactive metal first:
Magnesium, Copper, Iron, Sodium, Zinc, Lead, Calcium
Can we keep sodium immersed under water? Why?
Write the equation for the reaction of:
Magnesium with dilute hydrochloric acid.
Name the products formed in the given case. Also indicate the physical states of all the substances involved.
What is meant by the reactivity series of metals?
An element X reacts with hydrogen, when heated, to form a covalent hydride H2X. If H2X has a smell of rotten eggs, the element X is likely to be ______.
Out of the following oxides, the amphoteric oxide is:
An element X forms two oxides XO and XO2. The oxide XO is neutral but XO2 is acidic in nature. The element X is most likely to be ______.
State and explain the reaction of the following metal with a solution of copper sulphate:
Gold
What is the cause of chemical bonding (or chemical combination) of atoms of elements?
Choose the correct alternative and rewrite the following:
Reaction of iron nails whith copper sulphate solution is an example of _____________________
Calcium floats over water during the reaction with water. Give reason.
Generally, metals are solid in nature. Which one of the following metals is found in liquid state at room temperature?
Metals are generally solid. Which of the following metals is in the liquid state at room temperature?
