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
How do the following help in bringing about a chemical change?
pressure.
How do the following help in bringing about a chemical change?
heat.
Complete and balance the following chemical equations
NaCI + `AgNO_3` `→`
Write true or false :
When potassium iodide solution is added to lead acetate solution a red precipitate is formed.
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)
A colourless solution of calcium hydroxide in a test tube turns ______ on blowing in it through a blow tube for some time.
Complete and balance the following reaction:
\[\ce{NH3 + O2 ->[\Delta]}\]
Give a word equation for the following reaction.
An exothermic reaction where both the reactants are gases, one of which is oxygen.
State the following reaction represent oxidation or reduction.
\[\ce{Al->Al+++}\]
Explain the term chemical reaction with special reference to reactants and products.
Silver articles turning black: ______:: Boiling of H2O: physical change ______.
