Multiple Choice Questions 10×1=10
1
Which other metal can be used to reduce alkyl halides?
2
Why does a mixture of zinc and hydrochloric acid acts as a reducing agent?
A
Because zinc acts as a reducing agent
B
Because atomic hydrogen is produced with Zn/HCl which acts as a reducing agent
C
Because molecular hydrogen is produced with Zn/HCl which acts as a reducing agent
D
Because chloride ions are produced with Zn/HCl which act as a reducing agent
3
Which alkane will evolve the most amount of heat when it is burnt with oxygen?
Hint: Larger alkanes produce more heat energy upon complete combustion.
A
Ethane
B
Propane
C
n-Butane
D
Iso-Butane
4
Which type of hydrocarbon has the highest boiling point?
A
Alkane
B
Alkene
C
Alkyne
D
Aromatic
5
Alkane molecules are:
A
Polar
B
Non-polar
C
Both A and B
D
None of these
6
The formula of pentane is:
C5H12
A
C6H12
B
C6H10
C
C6H8
D
C6H14
7
Saturated hydrocarbons are also called:
A
Olefins
B
Paraffins
C
Alkane
D
Alkyne
8
The reduction of alkyl halides takes place in the presence of:
A
Zn/HCl
B
Na/HCl
C
Mg/HCl
D
Cu/HCl
9
The breakdown of naphtha produces:
A
Alkane
B
Alkenes
C
Both A and B
D
Aromatic
10
Which of the following will react with one mole of H2 to form saturated hydrocarbons?
Alkene + H2 → Alkane
A
Alkanes
B
Alkene
C
Alkyne
D
Benzene
Short Answer Questions 15×2=30
I
Write down the names of five such organic compounds which exist naturally?
III
What is abbreviation of CNG and LPG?
IV
What is meant by Alkanes?
V
Why Alkanes are called paraffins?
VI
What is the general formula of alkanes?
CnH2n+2
VII
Write down the dot and cross formula of butane.
VIII
What is the difference between normal butane and iso-butane?
Hint: Consider their structural arrangement and branching.
IX
What is alkyl radicals? Give general formula.
X
How alkyl radicals are formed?
xii
What do you means by hydrogenation of alkenes?
xiii
What is reduction of alkyl halides?
xiv
How do you compare the melting and boiling points of inorganic and organic compounds? Constructed Response
xv
What do you understand by the structural formula of an organic compound? Exercise