12. Name the type of reactions in the following cases:
a. Garbage producing foul smell
b. Burning of natural gas.
c. Carbon dioxide gas passed through lime water
Q.5. Mohan tool pure water for the electrolytic decomposition of water but did not see any bubbles near the electrodes. Explain why?
A substance ‗X displaces ‗Y from its solution in water. It is called displacement reaction.
What other chemical name can be given to such type of reactions? Explain, giving an
example?
Q. 8 A grey coloured metal ‗Z(Atomic weight=65) is used in making dry cell. It reacts with dil.
HCl to liberate a gas. What is the gas evolved? Calculate the minimum amount of ‗Z
required to produce 100l 0f gas?
Can we call a chemical reaction an oxidation reaction in which hydrogen is removed?
Which gas is evolved when acid is added to lime water?
Which of the two is a redox reaction?
a) Displacement
b) Double displacement
What is one important similarity between rusting and burning?
I conduct electric current and get a green coating when exposed to humid atmosphere for long.name it
12
a) Garbage produce foul smell because of decomposition of organic waste material by microorganism produces methane and H2S.It is an example of decomposition reaction.
b) Burning of natural gas is reaction of natural gas in excess of oxygen. It is an example of oxidation reaction.
c) When CO2 gas passed through lime water, it produce a new product called CaCO3.It is an example of combination reaction.
Please ask different questions in different threads.
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