Introduction to Alkenes

Q. 24 how to find bond order of 1) benzene

Q. 4. The number of moles of CO2 molecule formed during combustion reaction of 2 mol of benzene in sufficient oxygen supply is

Q. Enthalpy of formation of C3H8, CO2, H2O is 104, -394, 286kj/mol. Calculate the enthalpy of combustion of 66g of propane

Q.

Which one of the following statement is not true for octet rule?

1. It does not explain relative stability of molecules.

2. It is useful for understanding structures of most of organic compounds.

3. It accounts for the shape of molecules.

4. It is based upon the chemical inertness of noble gases.

Q. what is the common name of ethyl benzene?

Q.

Which of the following obeys Huckel Rule?

1. 

2. 

3. 

4. 

Q. What is the order of increasing heat of hydrogenation for the following compounds (lowest first)?

1. I, II, III, IV
2. II, IV, I, III
3. I, III, IV, II
4. IV, II, III, I

Q. resonance structure of 1, 1, 2-trimethyl-4-oxo cyclohex-2, 5-diene

Q. 1. Is there any formula to calculate no of resonating structures of benzene compounds say nitrobenzene?

Q.

The compound in which carbon uses only its $s{p}^3$ hybrid orbitals for bond formation is

1. (NH₂)₂CO

2. HCOOH

3. (CH₃)₃COH

4. (CH₃)₃CHO

Q. 21. How many Sigma and pi bonds in ethylene and how many hybrid orbitals is in ethylene?

Q. Which of the following(s) will not show geometrical isomerism?

1. 
2. 
3. 
4. 

Q.

Which of the following isomerism is not shown by alkenes?

1. Geometrical

2. Position

3. Tautomerism

4. None of these

Q. geometrical isomerism in benzene

Q. Q 11/15 Number of sigma bond in Ethene is

Q. Considering the following alkenes:
$\underset{\left(i\right)}{\text{But-1-ene}}\underset{\left(ii\right)}{2,3-Dimethylbut-2-ene}\underset{\left(iii\right)}{\text{2-Methylbut-2-ene}}\underset{\left(iv\right)}{\text{2-Methylpropene}}$
The order of stability is

1. I > II > III > IV
2. II > III > IV > I
3. IV > III > II > I
4. III > IV > I >

Q. The total number of benzene derivatives having the molecular formula C_7H_7Cl is:

Q.

(CH3)2CHCH2CH(C2H5 )CH(CH3)CH3

Q.

A mixture of methane and ethylene (ethene) in the volume ratio x : y has a total volume of 30ml.On complete combustion it gave 40ml of CO₂.If the ratio had been y : x , instead of x : y what volume of CO2 could have been obtained??