Advertisements
Advertisements
प्रश्न
Define the following term:
Precipitate
Advertisements
उत्तर
Chemical reactions which are characterised by the formation of insoluble solid substances are called precipitates.
APPEARS IN
संबंधित प्रश्न
Define precipitation reaction.
Give reason .
A person suffering from acidity is advised to take an antacid.
FILL IN THE BLANK
In a double decomposition precipitation reaction both the reactants must be ............ soluble.
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)
Oxygen is a ______ in respiration.
Give reason for the following:
Blue solution of copper sulphate changes to green when a piece of iron is added to this solution.
Complete the table given below.
| Flame test for calcium chloride | Acid used for flame test |
Match the chemical reactions in List I with the appropriate answer in List II.
| List I | List II | ||
| 1. | \[\ce{XY⇌[heat]X + Y}\] | A: | Displacement reaction |
| 2. | \[\ce{XY->X + Y}\] | B: | Double decomposition |
| 3. | \[\ce{X+Y- + A+B^-->X+B- + A+Y-}\] | C: | Endothermic reaction |
| 4. | \[\ce{X + YZ->XZ + Y}\] | D: | Thermal dissociation |
| 5. | \[\ce{X + Y->[heat]XY -\Delta}\] | E: | Decomposition reaction |
A student took a solution of copper sulphate in a beaker and put a clean iron nail into it and left it for about an hour.
Are these changes chemical in nature?
Which is used as a catalyst during the process of hydrogenation of oils?
What is thermochemical reactions?
