Oxidation of Alkenes

Q. Which of the following is the information conveyed by a balanced chemical equation?

1. Mechanism of the reaction
2. Temperature and pressure
3. Relative amount of reactants and products
4. Whether a particular reaction is feasible or not.

Q. The products obtained when 2-Methylpropene is oxidised with hot conc. acidic $KMn{O}_4$ are

1. $({\mathrm{CH}}_3{)}_{2}C=O,\mathrm{HCHO}$
2. $({\mathrm{CH}}_3{)}_{2}C=O,{\mathrm{CO}}_2\&H_{2}O$
3. ${\mathrm{CH}}_3\mathrm{COOH},\mathrm{HCHO}$

Q. In a chemical reaction,
$K_{2}C{r}_2{O}_7+x{H}_{2}S{O}_4+yS{O}_2\to K_{2}S{O}_4+C{r}_2(S{O}_4{)}_3+z{H}_{2}O$
The value of $x,y,z$ are respectively:

1. $2,1,2$
2. $3,2,3$
3. $4,1,4$
4. $1,3,1$

Q. Give balanced equations when:
(a) ethene is burnt in excess of oxygen.
(b) ethene reacts with chlorine.
(c) ethene combines with hydrogen chloride.
(d) a mixture of ethene and hydrogen is passed over nickel at ${200}^{\circ }$C.

[4 MARKS]

Q. Name the products formed and give appropriate chemical equations for the following :​

(b) Ethanol oxidized by acidified potassium dichromate.​

Q. The products obtained when 2-methylpropene is oxidised with hot conc. acidic $KMn{O}_4$ are .

1. $({\mathrm{CH}}_3{)}_{2}C=O,\mathrm{HCHO}$
2. $({\mathrm{CH}}_3{)}_{2}C=O,{\mathrm{CO}}_2,H_{2}O$
3. ${\mathrm{CH}}_3\mathrm{COOH},\mathrm{HCHO}$

Q. How can we distinguish between alcohol and carboxylic acid by alkaline $KMn{O}_4$ test?

Q.

Give balanced equations when :
(a) ethene is burnt in excess of oxygen.
(b) ethene reacts with chlorine.
(c) ethene combines with hydrogen chloride.
(d) a mixture of ethene and hydrogen is passed over nickel at ${200}^{\circ }C$.

Q.

What happens when ethene burns in the air if the supply of air is in excess?

1. Carbon dioxide is produced

2. Hydrogen gas is produced

3. Oxygen gas is produced

4. Carbon monoxide is produced

Q. $C{H}_2=C{H}_2+PdC{l}_2+H_{2}O\stackrel{CuC{l}_2+H^{+}}{\to }C{H}_3-CHO+Pd+2HCl$

1. Wackers method
2. Rosenmund reaction
3. Clemmensen's reaction
4. Tischenko reaction

Q.

Unsaturation in the organic compound can be tested by the help of :

1. Baeyer's test

2. Dehydration reaction

3. Fehling's solution

4. Chlorine water

Q. $2\mathrm{Mg}\left(s\right)+O_2\left(g\right)\to 2\mathrm{MgO}\left(s\right)$
In the given equation, magnesium (Mg) is a

1. reactant
2. product
3. condition
4. catalyst

Q. Match the reactants with the respective products formed.

1. ${\mathrm{CH}}_3\mathrm{CH}={\mathrm{CH}}_2+\left(O\right]$
2. ${\mathrm{CH}}_2={\mathrm{CH}}_2+\left(O\right]$
3. ${\mathrm{CH}}_3\mathrm{CH}={\mathrm{CHCH}}_3+\left(O\right]$
4. 1, 2-Epoxypropane
5. Oxirane
6. 2, 3-Epoxybutane

Q. $448$ mL of a hydrocarbon (A) having C ($87.80$%), H ($12.19$%) weigh $1.64$ g at NTP. On hydrogenation it gives 2 methyl pentane. Treatment of (A) with acidic $HgS{O}_4$ gives a new compound (B) of molecular weight $C_6{H}_{12}O$. Compound (A) does not react with ammoniacal $AgN{O}_3$. What is the structure of (A)?

Q. Which of the following reagents can convert propionic acid into 1-propanol ?

1. $NaB{H}_4$
2. $LiAI{H}_4$
3. $Na$ and $C_2{H}_{5}OH$
4. $H_2/Ni$

Q.

What happens when ethene burns in the air if the supply of air is in excess?

1. Carbon monoxide is produced

2. Oxygen gas is produced

3. Carbon dioxide is produced

4. Hydrogen gas is produced

Q. $2\mathrm{Mg}\left(s\right)+O_2\left(g\right)\to 2\mathrm{MgO}\left(s\right)$
In the given equation, magnesium (Mg) is a .

1. reactant
2. product
3. catalyst

Q. The products obtained when 2-methylpropene is oxidised with hot conc. acidic $KMn{O}_4$ are .

1. $({\mathrm{CH}}_3{)}_{2}C=O,\mathrm{HCHO}$
2. $({\mathrm{CH}}_3{)}_{2}C=O,{\mathrm{CO}}_2,H_{2}O$
3. ${\mathrm{CH}}_3\mathrm{COOH},\mathrm{HCHO}$

Q. Match the reactants with the respective products formed.

1. ${\mathrm{CH}}_3\mathrm{CH}={\mathrm{CH}}_2+\left(O\right]$
2. ${\mathrm{CH}}_2={\mathrm{CH}}_2+\left(O\right]$
3. ${\mathrm{CH}}_3\mathrm{CH}={\mathrm{CHCH}}_3+\left(O\right]$
4. 1, 2-Epoxypropane
5. Oxirane
6. 2, 3-Epoxybutane

Q. The products obtained when 2-Methylpropene is oxidised with hot conc. acidic $KMn{O}_4$ are

1. $({\mathrm{CH}}_3{)}_{2}C=O,\mathrm{HCHO}$
2. $({\mathrm{CH}}_3{)}_{2}C=O,{\mathrm{CO}}_2\&H_{2}O$
3. ${\mathrm{CH}}_3\mathrm{COOH},\mathrm{HCHO}$

Q. Which of the following hydrocarbon would give red ppt on reacting with ammoniacal cuprous chloride solution?

1. butyne
2. 2-butene
3. 2-butyne
4. butane