Advertisements
Advertisements
प्रश्न
Distinguish by heating the following in dry test tubs.
Zinc carbonate, Copper carbonate and lead carbonate.
Advertisements
उत्तर
| Zinc carbonate | Copper carbonate | Lead carbonate | |
| Residue left | Zinc oxide(ZnO) | Copper oxide(CuO) | Lead Oxide (PbO) |
| Colour of residue | Yellow when hot and white when cold | Colour is Black solid. | Colour is yellow. |
| Gas produced | Carbon dioxide gas is produced. | Carbon dioxide gas is produced. | Carbon dioxide gas is produced. |
APPEARS IN
संबंधित प्रश्न
Complete and balance the following chemical equations:
Zn + `"H"_2"SO"_4` `→`
(dil)
FILL IN THE BLANK
A .............. change is a temporary change.
What are chemical reactions?
Fill in the blank:
During a chemical reaction transfer of ________ takes place.
Complete the statement by filling the gap using an 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)
An ______ is drawn in between the reactants and products while writing the equation for a chemical reaction.
Distinguish by dilute sulphuric acid.
Sodium sulphide and sodium sulphite?
Select the correct answer for the following options:
The gas which reacts with oxygen to give a neutral liquid.
Give balanced equation for the following conversion affected by heat alone on the substance:
Zinc nitrate to nitrogen dioxide
Classify the following as physical or chemical properties
Zinc dissolves in hydrochloric acid with the evolution of hydrogen gas.
Rusting of iron is ______.
