please give atleast 10 important questions from chemical reaction and equation (no answers like --refer google)please help me out guys
Answers
Answer:
1).What is the colour of ferrous sulphate crystals? How does this colour change after heating?
2)Why are decomposition reactions called the opposite of combination reactions? Write equations for these reactions.
3)What is rancidity? Mention any two ways by which rancidity can be prevented.
4)write balanced chemical equation for the reactions that take place during respiration. Identify the type of combination reaction that takes place during this process and justify the name. Give one more example of this type of reaction.
5)What is redox reaction? Identify the substance oxidised and the substance reduced in the following reactions.
(i)2PbO + C —–> 2Pb + CO2
(ii)MnO2 + 4HCl —–> MnCl2 + 2H20 + Cl2
6)Write the balanced chemical equations for the following reactions and identify the type of reaction in each case.
Thermite reaction, iron (III) oxide reacts with aluminium and gives molten iron and aluminium oxide.
7)State one basic difference between a physical change and a chemical change.
8)What is meant by a chemical reaction?
9)Using a suitable chemical equation, justify that some chemical reactions are determined by:
(i) change in colour, (ii) change in temperature.
10) A white salt on heating decomposes to give brown fumes and a residue is left behind.
(i) Name the salt.
(ii) Write the equation for the decom-position reaction.
Step-by-step explanation:
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