Chemical Properties of Alkanes

Q.

Write the balanced chemical equation for Preparation of Ethanol from Ethyl chloride.

Q. Combustion of alkanes in limited supply of oxygen leads to the formation of and water.

1. carbon dioxide (${\mathrm{CO}}_2$)
2. carbon monoxide (CO)
3. formaldehyde (HCHO)
4. methanol (${\mathrm{CH}}_3\mathrm{OH}$)

Q.

A student added acetic acid to test tubes I, II, III and IV containing the labeled substance and then brought a burning splinter near the mouth of each test tube.

The splinter would be extinguished when brought near the mouth of test tube:

1. III

2. I

3. IV

4. II

Q. Write balanced chemical equations for the following :​

(v) Ethanol reacts with sodium at room temperature​

Q.

(a) Write balanced equations

(i) when butane is burnt in oxygen
(ii) preparation of ethylene from ethyl alcohol.

(b)

(i)Convert ethane to acetic acid
(ii)Convert acetylene to ethane
(iii)Convert acetic acid to ethyl alcohol
(iv)Convert acetic acid to ethyl acetate.

Q.

Hydrocarbons, when burnt in an oxygen deficient environment, gives a blue flame.

1. True

2. False

Q.

The organic compound which undergoes substitution reaction is:

1. ${\mathrm{C}}_2{\mathrm{H}}_2$

2. ${\mathrm{C}}_2{\mathrm{H}}_4$

3. ${\mathrm{C}}_{10}{\mathrm{H}}_{18}$

4. ${\mathrm{C}}_2{\mathrm{H}}_6$

Q.

Cracking of Ethane gives a mixture of

1. H2 and methane

2. Only CH4

3. Ethene and H₂

4. Ethene, Methane and H₂

Q. Combustion of alkanes in the presence of an excess of oxygen gives along with water.

1. carbon monoxide
2. caron dioxide
3. coke

Q. Write balanced chemical equations for the following:​

(iii) Ethanol under high pressure and low temperature are treated with acidified potassium dichromate.​

Q. Name the organic compound prepared by each of the following reactions :​
$\left(ii\right)C{H}_{3}l+2H\to$

Q. Write the general equation for combustion of ammonia

1. NH₃ (g) + O₂ (g) → N₂O (g) + H₂O (g)

2. NH₃ (g)+O₂ (g)→ NO₂ (g)+H₂O (g)

3. NH₃ (g) +O₂ (g) → N₂ (g) + H₂O (g)

4. NH₃ (g) + O₂ (g) → NO (g) + H₂O (g)

Q. $\underset{–}{2KCl{O}_3}⟶2KCl+3O_2$
The equivalent weight of the underlined species (by taking its molecular weight as $M$) is :

1. $E=\frac{M}{6}$
2. none of these
3. $E=\frac{M}{4}$
4. $E=\frac{M}{3}$

Q. Is the difference between valency, valence and oxidation State. Do all three terms mean the same or are all the terms different? give me definition of valency, valence and oxidation State which cover all points

Q. What happens when (write chemical equation in each case)
(1) ethanol is burnt in air?
(2) ethanol is heated with excess $conc.H_{2}S{O}_4$ at $443K$?
(3) a piece of sodium is dropped into ethanol?

Q. Question 2
A mixture of oxygen and ethyne is burnt for welding. Can you tell why a mixture of ethyne and air is not used?

Q. Which of the following carbides on treatment with water give methane?

1. $A{l}_4{C}_3$
2. $M{g}_2{C}_4$
3. $Ca{C}_2$
4. $B{e}_{2}C$

Q. Mg metal burns in air to give a white ash. When this ash is treated with water, sometimes the odour of ammonia can be detected, because of:

1. $MgO$ formation
2. $M{g}_3{N}_2$ formation
3. $Mg(OH{)}_2$ formation
4. $M{g}_2{N}_3$ formation

Q. Chlorine replaces hydrogen from the hydrocarbons to produce various products. This type of reaction is called ______ reaction.

1. substitution
2. addition
3. hydrogenation
4. combination

Q. The equivalent mass of $KI{O}_3$ in the reaction,
$2cr(OH{)}_3+O{H}^{-}+KI{O}_3\to 2Cr{O}_4^{2-}+KI+5H_{2}O$ is :

1. molecular mass
2. molecular mass/3
3. molecular mass/6
4. molecular massl2

Q. Chlorine replaces hydrogen from the hydrocarbons to produce various products. This type of reaction is called ______ reaction.

1. substitution
2. addition
3. hydrogenation
4. combination

Q. Identify (C) in the following reaction series:

1. $C_2{H}_{5}O{C}_2{H}_5$
2. $C{H}_{3}C{H}_{2}OS{O}_{3}H$
3. $C{H}_{3}C{H}_{2}OH$
4. $C{H}_2=C{H}_2$

Q. Give balanced chemical equations for the following conversations: Ethanoic acid to ethly ethanoate.