Structure of Alkanes

Q.

Why is benzene nonpolar?

Q. Give two chemical tests to distinguish between ethane and ethyne.

Q. State what do you observe when ethene is bubbled through a solution of bromine in tetrachloromethane (carbon tetrachloride).

Q. (i) Write the equation for the laboratory preparation of ethyne (acetylene) from calcium carbide.
(ii) What is the special feature of the structure of ethyne?
(iii) What would you see when ethyne is bubbled through a solution of bromine in carbon tetrachloride?
(iv) Name the addition product formed between ethene and water.

Q. The compound used to distinguish between alkenes and alkynes

Q.

Name the hydrocarbon which :
(a)is a tetrahedral molecule,
(b)is a planar molecule,
(c)is a linear molecule,
(d)forms a red precipitate with ammoniacal solution of copper (I) chloride,
(e) is known as paraffin,
(f) is known as olefin.
(g) a compound which will give acetylene (ethyne) gas when treated with water.

Q.

Alkanes are acyclic saturated hydrocarbons.

1. True

2. False

Q. Write the equation for the following laboratory preparations:
(i) Ethane from sodium propionate.
(ii) Ethene from iodoethane.
(iii) Ethyne from calcium carbide.

Q. (i) Write the equation for the preparation of carbon tetrachloride from methane.
(ii) Draw the structural formula of ethyne.
(iii) How is the structure of alkynes different from that of alkenes?

Q.

Ethane, with the molecular formula $C_2{H}_6$ has

1. 

2. 

3. 

4. 

Q. One of the following organic compounds cannot decolourise the red-brown colour bromine water. This compound is:

(a) C₁₄H₂₈
(b) C₁₄H₂₈
(c) C₁₄H₂₈
(d) C₁₄H₂₈

Q.

Ethane, with the molecular formula $C_2{H}_6$ has

1. 6 covalent bonds

2. 3 covalent bonds

3. 5 covalent bonds

4. 7 covalent bonds

Q.

Alkanes are acyclic saturated hydrocarbons.

1. True

2. False

Q.

Ethane, with the molecular formula $C_2{H}_6$ has

1. 

2. 

3. 

4. 

Q. The word root for a hydrocarbon with six carbon atoms is:

1. Pent
2. Hex
3. Dec
4. But