Advertisements
Advertisements
प्रश्न
When a metal X is treated with cold water, it gives a basic salt Y with molecular formula XOH (Molecular mass = 40) and liberates a gas Z which easily catches fire. Identify X, Y and Z and also write the reaction involved.
उत्तर
When sodium metal is treated with cold water, it gives a base sodium hydroxide and hydrogen gas is liberated which undergo explosive combustion reaction in an atmosphere of oxygen gas with a pop sound.
Hence, metal X is sodium, base Y is sodium hydroxide and gas Z is hydrogen gas.
`2"Na"("s") + 2"H"_2"O"("l") -> 2"NaOH"("aq") + "H"_2("g")`
APPEARS IN
संबंधित प्रश्न
Name two metals which will displace hydrogen from dilute acids, and two metals which will not.
Give reason:
Sodium, potassium and lithium are stored under oil.
Diamond : electric insulator : : _______ : electric conductor
Which of the following oxide(s) of iron would be obtained on the prolonged reaction of iron with steam?
Which one of the following metals does not react with cold as well as hot water?
Generally, metals react with acids to give salt and hydrogen gas. Which of the following acids does not give hydrogen gas on reacting with metals (except Mn and Mg)?
Which of the following reacts with cold water vigorously?
Out of three metals, sodium, calcium and aluminium, which metal reacts most with water? Give the equation of reaction with all three metals.
Answer the questions based on the figure below:
- Which experiment setup is demonstrated in the figure?
- What do you conclude after the reactions? Name reaction.
Answer the questions based on the figure below:
- Which reaction is shown in the figure?
- Which gas is evolved in the reaction?
- Give an example of reactants that rapidly show this reaction. Give equations.
- Give an example of reactants that do not react rapidly.
- In what condition will reactants of (c) part react? Give equation.
