Preparation of Alkanes

Q. What are the products when ethane reacts with chlorine in the presence of sunlight?

Q. Mehak wanted to prepare an alkane, she added soda lime to sodium ethanoate. The reaction that took place would be: ${\mathrm{CH}}_3\mathrm{COONa}+\mathrm{NaOH}+\mathrm{CaO}\stackrel{\Delta }{\to }{\mathrm{Na}}_2{\mathrm{CO}}_3+$

1. ${\mathrm{CH}}_4$
2. ${\mathrm{CH}}_3-{\mathrm{CH}}_3$
3. ${\mathrm{CH}}_3-\mathrm{COOH}$
4. ${\mathrm{CH}}_2={\mathrm{CH}}_2$

Q.

Name the compound prepared from :
(a) sodium propionate, (b) methyl iodide and
(c) ethyl bromide.
Write a balanced equation for the same.

Q.

How is : (a) methane and (b) ethane prepared in the laboratory?

Q.

Write the equations for the following lab. preparations:
(a) Ethane from sodium propionate,
(b) Ethene from Iodoethane,
(c) Ethyne from calcium carbide,
(d) Methanol from Iodomethane.

Q.

(a) Write an equation for the laboratory preparation of
(i) an unsaturated hydrocarbon from calcium carbide. (ii) an alcohol from ethyl bromide.
(b) What would you see, when ethyne is bubbled through a solution of bromine in carbon tetrachloride ?
(c) Name the addition product formed between ethene and water.

Q.

By the reduction of alkyl halides, we get alkanes. The best alkyl halide contains which halogen?

1. Iodide

2. Bromide

3. Fluoride

4. Chloride

Q. Which of the following does not belong to the same homologous series ?

1. $C{H}_4$
2. $C_2{H}_6$
3. $C_4{H}_8$
4. $C_3{H}_8$

Q.

Name the compound in the image given below:

1. 1, 1-Dichloro-3-methylhexane
2. 6, 6-Dichloro-4-methylhexane
3. 1, 2-Dichloro-3-methylhexane
4. 1-chloro-1-chloro-3-methylhexane

Q.

1)Why does the size of atoms of halogen family decreases down the group??

2)reactivity of the atoms of halogen family decreases down the group , why ??

3)why does the atom of halogen family do not react with water and acids??

Q. Mehak wanted to prepare an alkane, she added soda lime to sodium ethanoate. The reaction that took place would be: ${\mathrm{CH}}_3\mathrm{COONa}+\mathrm{NaOH}+\mathrm{CaO}\stackrel{\Delta }{\to }{\mathrm{Na}}_2{\mathrm{CO}}_3+$

1. ${\mathrm{CH}}_4$
2. ${\mathrm{CH}}_3-{\mathrm{CH}}_3$
3. ${\mathrm{CH}}_3-\mathrm{COOH}$
4. ${\mathrm{CH}}_2={\mathrm{CH}}_2$

Q. An organic compound $A$ of molecular formula $C_2{H}_{6}O$ on oxidation with dilute alkaline $KMn{O}_4$ solution gives an acid $B$ with same number of carbon atoms. Compound $A$ is often used for sterilisation of skin by doctors. Choose the incorrect statement among the following.

1. Compound $A$ is ethanol
2. Compound $B$ is ethanoic acid
3. Compound $A$ is acetone
4. Compound $B$ is a prime component of vinegar

Q. Reaction of alkenes with halogens is explosive in case of :

1. $F_2$
2. ${Br}_2$
3. ${Cl}_2$
4. $I_2$

Q.

Name the compound in the image given below:

1. 1, 1- Dichloro- 3- methylhexane

2. 1, 2- Dichloro- 3- methylhexane

3. 6, 6- Dichloro- 4- methylhexane

4. 1- Chloro- 1- chloro- 3- methylhexane

Q.

By the reduction of alkyl halides, we get alkanes. The best alkyl halide contains which halogen?

1. Fluoride

2. Bromide

3. Chloride

4. Iodide

Q. (a) Define a homologous series. Give the name and structural formula of one homologue of the following:
CH₃OH
(b) Write the molecular formula of the third member of the homologous series of carbon compounds with general formula C_nHO_2n+1OH.
(c) Name any two fossil fuels.