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प्रश्न
Give a balanced equation for the conversion of a soluble lead salt to an insoluble lead salt – formed as a white precipitate.
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उत्तर
Lead nitrate when reacts with sodium chloride insoluble white ppt. of lead chloride is formed
\[\ce{\underset{\text{colourless}}{Pb[NO3]2} + 2NaCl->\underset{\text{white ppt.}}{PbCl2 v} + 2NaNO3}\]
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संबंधित प्रश्न
Changes in which new substances are formed are called ______ changes.
TRUE \ FALSE
The evolution of a gas during a chemical reaction is shown by an arrow pointing downwards. True or false ?
| Reactants | Products | Type of chemical reaction |
| BaCl2(aq) + ZnSO4(aq) | H2CO3(aq) | Displacement |
| 2AgCl(s) | FeSO4(aq) + Cu(s) | Combination |
| CuSO4(aq) + Fe(s) | BaSO4↓ + ZnCl2(aq) | Decomposition |
| H2O(l) + CO2(g) | 2Ag(s) + Cl2(g) | Double displacement |
Complete the statement by filling the gaps using appropriate term from the terms given in the bracket.
(slow, coloured, arrow, fast, smell, milky, physical, product, chemical, reactant, covalent, ionic, octet, duplet, exchange, sharing, equality sign)
The white particles of baking soda disappear when put in lemon juice. This means that it is a ______ change.
State the original colour of the following substance and colour of residue obtained after heating.
Lead nitrate
Write your observation and a balanced equation in the case of the following substances being heated.
Copper carbonate.
Complete the table given below.
| Addition of dil. H2SO4 to zinc | Test for gas evolved |
State the following reaction represent oxidation or reduction.
\[\ce{Ag->Ag+}\]
______ gas causes tears in our eyes while cutting onions.
Analogy:
H2O: Water:: NaCl: ______.
