Advertisements
Advertisements
प्रश्न
Classify the following reaction into –
- Direct combination
- Decomposition
- Displacement
- Double decomposition
The reaction is – Zinc hydroxide on heating gives zinc oxide and water.
Advertisements
उत्तर
Zinc hydroxide a single compound decomposes into two simpler components zinc oxide and water, hence it is a decomposition reaction.
APPEARS IN
संबंधित प्रश्न
Why are decomposition reactions called the opposite of combination reactions? Write equations for these reactions.
What type of chemical reaction takes place when silver bromide is exposed to sunlight?
What type of chemical reaction takes place when electricity is passed through water?
What type of chemical reaction is represented by the following equation?
\[\ce{X -> Y + Z}\]
State the change in colour observed in the following case, mentioning the reason:
Silver chloride is exposed to sunlight.
Two metals X and Y form the salts XSO4 and Y2SO4, respectively. The solution of salt XSO4 is blue in colour whereas that of Y2SO4 is colourless. When barium chloride solution is added to XSO4 solution, then a white precipitate Z is formed along with a salt which turns the solution green. And when barium chloride solution is added to Y2SO4 solution, then the same white precipitate Z is formed along with colourless common salt solution.
- What could the metals X and Y be?
- Write the name and formula of salt XSO4.
- Write the name and formula of salt Y2SO4.
- What is the name and formula of white precipitate Z?
- Write the name and formula of the salt which turns the solution green in the first case.
Explain the following type of chemical reaction, giving two examples for it:
Decomposition reaction
Give a balanced equation for –
A double decomposition neutralization reaction involving an acid and a base
Explain the reaction given in the figure.
The reaction of calcium carbonate, with freshly prepared lime water, is shown below:
Answer the questions with the help of a diagram:
- What type of reaction does calcium carbonate undergoes?
- What change in colour is observed in lime?
- Write the chemical equation.
