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Standard IX
Chemistry
Chains, Rings and Branches
1) Why Alkane...
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1) Why Alkanes are called Saturated ? 2) Why Alkenes and Alkyne are called Unsaturated ?
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Q.
Why are certain compounds called hydrocarbons? Write the general formula for homologous series of alkanes, alkenes and alkynes and also draw the structure of the first member of each series. Write the name of the reaction that converts alkenes into alkanes and also write a chemical equation to show the necessary conditions for the reaction to occur.
Q.
Which one has grater bond length alkanes. alkenes or alkynes and why?
Q.
Which is more polar.... alkane alkene or alkyne and why??
Q.
Rewrite the following choosing the correct word from each pair given in brackets:
The hydrocarbons containing at least one carbon to carbon _______________ (double/triple) bond are called __________ (alkenes/alkynes). They have the general formula
C
n
H
2
n
. These were previously called ______________ (olefins/paraffins). When this compound is treated with ____________ (bromine/lime) water, decolourisation occurs because it is ____________ (saturated/unsaturated).
Q.
Alkenes and alkynes are unsaturated compounds.
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