Introduction to Alkenes

Q. The total number of geometrical isomers possible in following compound is

1. 2
2. 1
3. 8
4. 6

Q.

Draw the structure for ${\mathrm{BeCl}}_2$ in

(a) Vapour form

(b) Solid state

Q. The standard enthalpy of formation of CH4(g), CO2(g) and H2O(g) are -76.2, -394.8 and -241.6 kJ/mol respectively. Calculate the heat of combustion of methane.

Q. Which of the following can show geometrical isomerism?

1. 
2. 
3. All of the above.
4. 

Q. Which of the following compounds cannot show geometrical isomerism ?

1. 
2. 
3. 
4. 

Q. How do you convert the following :
(i) Prop-1-ene to 1-fluoropropane
(ii) Chlorobenzene to 2-chlorotoluene
(iii) Ethanol to propanenitrile

Q. Bond angle in $P{H}_4^{+}$ is higher than that in $P{H}_3$. Why?

Q. Identify the number of compounds that can show geometrical isomerism.

Q. Which of the following alkene is most stable?

1. 
2. 
3. 
4. 
   

Q.

Give Reason: Phenol is more acidic than ethanol.

Q. Geometrical isomerism is not possible in

1. Propene
2. But-2-ene
3. Butenedioic acid
4. Cyclic compound

Q.

The structure of ${\mathrm{H}}_2{\mathrm{O}}_2$ is:

1. Planar

2. Non-Planar

3. Spherical

4. Linear

Q.

Which is stronger Hyperconjuction or Inductive effect?

Q.

The enthalpy change for the combustion of ethanol at 298 K and 1 atm is given below

CH₃-CH₂OH(l) + 3O₂(g)------------à 2CO₂ (g)+ 3H₂O(l) ∆H=-1363Kj.Calculate the internal energy change for the above reaction?

Q.

A molecule of ammonia $\left({\mathrm{NH}}_3\right)$ has

1. Only single bonds

2. Only double bonds

3. Only triple bonds

4. Two double bonds and one single bond

Q. Which of the following exhibits geometrical isomerism?

1. 
2. 
3. 
4. 

Q. The compound having both sp and $s{p}^2$ hybridised carbon atom is

1. Propene
2. None of these
3. Propyne
4. Propadiene

Q.

What is 'A' in the following reaction?

Q.

Why phenols are not useful for preparation of haloarenes

Q. What is the minimum number of carbons required to show geometrical isomerism?

1. 0
2. 1
3. 2
4. 3

Q. Which of the following compounds will undergo tautomerism?

1. 
2. 
3. 
4. All of the above

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. Which of the following statements are correct about stability of chelates– (A) As the number of rings in complex increases, stability of chelate also increases (B) A chelate having five membered ring is more stable if it contains double bonds. (C) A chelate having six membered ring is more stable than if it does not contain double bonds. (D) Chelating ligands are at least bidentate ligands.

Q.

What is the valency of Carbon in Acetylene if its valency is two in $\mathrm{CO}$ and four in ${\mathrm{CO}}_2$ and ${\mathrm{CH}}_4$?

Q.

Electrophilic addition on a carbon-carbon double bond involves the intermediate formation of a more stable carbocation. This statement is called

1. None of these
2. Markownikoff's rule
3. Saytzeff's rule

4. Baeyer's effect

Q.

How is structure of Alkynes are different from that of Alkenes?

Q. No. of geometrical isomers for the molecules if R is same?

1. 2
2. 3
3. 5
4. 6

Q.

In which of the following geometrical isomerism is not possible?

1. 

2. 

3. 

4. None of these

Q.

What is markovnikovs rule explain with an example?

Q.

Which of the following chemical compound is planar?

1. ${\mathrm{XeF}}_2$

2. ${\mathrm{XeO}}_3\mathrm{F}$

3. ${\mathrm{XeO}}_2{\mathrm{F}}_2$

4. ${\mathrm{XeF}}_4$