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Substitution reaction is a characteristic of..…
a) alkane                                               

b) alkene
c) alkyne                                              

d) none of these

a

Which one is the least reactive ……………
a) ethene

b) ethane              

c) ethyne

d) propane

b

The order of reactivity of hydrogen halides with alkene is …………
a) HI >HCl>HBr 

b) HI >HBr<HCl
c) HCl>HBr> HI 

d) HI >HBr>HCl

d

Ethene is a …………hormone.
a) plant                                  

b) animal
c) both a & b                                       

d) none of these

a

Ethene is a plant hormone that triggers………ripening.
a) leaves 

b) stem                  

c) fruit

d) root

c

………small size allows it to travel as a gas.

a) ethane                                              

b) ethene
c) propane                                            
d) octane

b