Advertisements
Advertisements
प्रश्न
Give a balanced equation for the preparation of two different insoluble lead salts from their salt solutions by double decomposition precipitation.
Advertisements
उत्तर
(i) \[\ce{\underset{\text{lead nitrate sol.}}{Pb[NO3]} + \underset{\text{sodium sulphate sol.}}{Na2SO4}->\underset{\text{soluble salt sod. nitrate}}{2NaNO3} + \underset{\text{ppt. lead sulphate}}{PbSO4 v}}\]
(ii) \[\ce{Pb[NO3]2 + \underset{\text{sodium chloride sol.}}{2NaCl}->\underset{\text{sodium nitrate (soluble)}}{2NaNO3} + \underset{\text{lead (II) chloride ppt.}}{PbCl2 v}}\]
APPEARS IN
संबंधित प्रश्न
Complete the following statement.
In the type of reaction called_______________, two compounds exchange their positive and negative radicals.
(a) What is synthesis?
(b) What kind of chemical reaction is synthesis? Support your answer by an example.
What is a double displacement reaction?
On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.
A coloured substance which decomposes violently leaving a coloured residue and evolving two neutral gases one of which is unreactive or inert in nature.
State which of the substance given below evolve oxygen gas on thermal decomposition.
Zinc carbonate
Define a thermal dissociation reaction with a suitable example.
Give a reason why zinc displaces hydrogen from dilute sulphuric acid but copper does not.
Give a balanced equation for the following type of reaction:
A soluble salt of lead formed from an insoluble base by double decomposition – neutralization.
Differentiate between the following:
Decomposition reaction and a double decomposition reaction.
Match the chemical reactions in List I with the appropriate answer in List II.
| List I | List II |
| 1. \[\ce{AB⇌[heat]A + B}\] | A: Double decomposition |
| 2. \[\ce{AB->A + B}\] | B: Thermal dissociation |
|
3. \[\ce{X+Y- + AB+B- ->X+B- + A+Y-}\] |
C: Endothermic reaction |
| 4. \[\ce{X + YZ->XZ + Y}\] | D: Displacement reaction |
| 5. \[\ce{X + Y->[heat]XY - \Delta}\] | E: Decomposition reaction |
