Advertisements
Advertisements
प्रश्न
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.
What changes do you expect?
Advertisements
उत्तर
Copper sulphate solution is blue in colour. When an iron nail is left in it for some time the blue colour of copper sulphate solution changes to green and the surface of iron nail gets a brown coloured deposit.
APPEARS IN
संबंधित प्रश्न
Define a photochemical reaction.
State the original colour of the following substance and colour of residue obtained after heating.
Lead nitrate
Distinguish by dilute sulphuric acid.
Sodium sulphide and sodium sulphite?
Select the correct answer for the following options:
The pale blue precipitated obtained when copper [II] sulphate reacts with sodium hydroxide.
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 white solid which evolves two colourless gases which on cooling combine and condense on the cooler parts of the test tube.
Give balanced equation for the following conversion affected by heat alone on the substance:
Zinc carbonate to zinc oxide
The chemical change is ______.
Classify the following as physical or chemical properties
Zinc dissolves in hydrochloric acid with the evolution of hydrogen gas.
Rusting of iron is ______.
How can we prevent rusting?
