Advertisements
Advertisements
Question
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?
Solution
Yes, the changes are chemical changes because new substances iron sulphate (green) and copper (brown) are formed in the reaction.
APPEARS IN
RELATED QUESTIONS
Write the missing reactants and products and balance the equations.
NaOH + ............... `→` NaCI + ...................
Write true or false :
Hydrogen sulphide has rotten egg smell .
Balancing a chemical equation is based on
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 spoiling of food is a chemical change which is recognized from the generation of certain ______ due to it.
Choose the correct option from the bracket and explain the statement giving reason.
(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition)
The conversion of ferrous sulphate to ferric sulphate is ______ reaction.
Name: Two carbonates do not produce carbon dioxide on heating.
What do you observe when CO2 is passed through lime water first and then a little in excess.
Explain with the help of balanced equations, how precipitation reactions are used for identifying the positive radicals in three different salts, each having a different cation [positive ion].
Limestone contains ______ mainly.
The simplest method of preventing rusting of iron is to coat it with oil, grease, or paint. The reason being ______.
