Introduction to Alkenes

Q.

What is the general formula of alkenes?

1. C_nH_2n+1

2. C_nH_2n

3. C_nH_n

4. C_nH_2n+2

Q. Question 3
What will be the formula and electron dot structure of cyclopentane?

Q.

The molecules of alkene family are represented by a general formula $C_n{H}_{2n}$. Answer the following:
(a) What do n and 2n signify?
(b) What is the name of alkene when n = 4?
(c) What is the molecular formula of alkene when n = 4?
(d) What is the molecular formula of the alkene if there are ten H atoms in it?
(e) What is the structural formula of the third member of the alkene family?
(f) Write the molecular formula of lower and higher homologous of an alkene which contains four carbon atoms.

Q.

What is the chemical name of the following compound?

1. Proponoic acid

2. Propanone

3. Pentanoic acid

4. Pentanone

Q. Question 30
Drawthe electron dot structure of ethyne and also draw its structural formula

Q.

Which among the following has a cyclic structure made up of carbon skeleton?

1. Ethyne

2. Ethene

3. Benzene

4. Ethane

Q. (a) Define the term isomerism. State two main causes of isomerism.

Q. Explain the following terms with example.

1. Alkane
2. Covalent bond

Q. Question 5 (c)
Draw the electron dot structure for propanone.

Q.

The name the compound in the image:___

Q.
The name of the compound in the above image is ___.

1. Prop-1-ene
2. 1-Propene
3. 1-Propene
4. Prop-2-ene

Q. Each molecule of Buckminsterfullerene contains ______ carbon atoms in it.

1. sixty
2. thirty
3. fifty
4. twenty

Q. 7. Which order of bond angle is correct? 1. OF_2>OCl_2 2. PH_3