Oxidation of Alkanes

Q.

What is the Wacker process? Explain with examples.

Q. Find out the product 'P' :
$2C{H}_4+O_2\underset{100atm}{\overset{Cu/523K}{\to }}P$

1. $HCHO$
2. $C{H}_{3}OH$
3. $H_{2}O$
4. $C{H}_{3}CHO$

Q.

Oxidation of toluene with $Cr{O}_3$ to benzaldehyde is carried out in the presence of acetic anhydride. Explain why.

Q. Aldehydes that do not undergo aldol condensation are
1. propanal
2. trichloroethanal
3. 2-phenylethanal
4. ethanal
5. benzaldehyde

1. 3 and 4 only
2. 2 and 5 only
3. 1, 2 and 5 only
4. 2, 3 and 5 only

Q.

Which of the following reactions is of Deacon’s process?

1. 

2. 

3. 

4. 

Q. Controlled oxidation of ethane in the presence of manganese acetate produces :

1. Ethanoic acid
2. Ethene
3. Ethanoate
4. Methane

Q. Some oxidation reactions of methane are given below. Which of them is/are controlled oxidation reactions?

1. $C{H}_4\left(g\right)+2O_2\left(g\right)\to C{O}_2\left(g\right)+2H_{2}O\left(l\right)$
2. $C{H}_4\left(g\right)+O_2\left(g\right)\to C\left(s\right)+2H_{2}O\left(l\right)$
3. $C{H}_4\left(g\right)+O_2\left(g\right)\stackrel{M{o}_2{O}_3}{⟶}HCHO+H_{2}O$
4. $2C{H}_4\left(g\right)+O_2\left(g\right)\stackrel{Cu/523/100atm}{⟶}2C{H}_{3}OH$

Q.

1. H₂O / H ⁺

2. BH₃ . THF / H₂O₂ -OH^-

3. Hg(OCOCH₃)₂. THF / NaBH₄. NaOH

4. All are possible

Q. The correct order of heat of combustion for following alkadienes is :

1. (C) < (B) < (A)
2. (B) < (C) < (A)
3. (A) < (B) < (C)
4. (A) < (C) < (B)

Q.

Which compounds give carbylamine reaction?

Q. Complete oxidation of ethane yields -

1. Ethanol and water
2. Ethanoic acid and heat energy
3. Water and carbon dioxide and heat energy
4. Ethanal and heat energy

Q.
The alkene formed as a major product in the above elimination reaction is
[2006]

1. 
2. 
3. 
4. $C{H}_2=C{H}_2$

Q. Which of the following is/are the suitable product(s) of pyrolysis of hexane?

1. $C_4{H}_8,C_2{H}_4$
2. $C_3{H}_6,C_2{H}_4,C{H}_4$
3. $C_2{H}_4,C_6{H}_{12}$
4. $C_7{H}_{16},C{H}_4$

Q. Find out the product 'P' :
$2C_2{H}_6+3O_2\underset{△}{\overset{(C{H}_{3}COO{)}_{2}Mn}{\to }}P+2H_{2}O$

1. $C{H}_{3}OH$
2. $H_{2}O$
3. $HCHO$
4. $C{H}_{3}COOH$

Q.

Write chemical equations for combustion reaction of the following hydrocarbons:

(i) Butane (ii) Pentene (iii) Hexyne (iv) Toluene

Q. When a mixture of methane and oxygen is heated in the presence of molybdenum oxide, the main product formed will be :

1. Methanoic acid
2. Methanal
3. Methanol
4. Ethanal

Q. Identify structure of reactant (X) :

1. 
2. 
3. 
4. 

Q. Toluene can be oxidised to benzoic acid by

1. H₂SO₄
2. KMNO₄
3. K₂Cr₂O₇
4. Botha) andb)

Q. Find the product 'X' in the given reaction :
$C{H}_4+H_{2}O\underset{△\left(1273K\right)}{\overset{Ni}{\to }}X+3H_2$

1. $CO$
2. $C{H}_{3}OH$
3. $C{H}_{3}CHO$
4. $HCHO$

Q. Which process is used to prepare oil gas from kerosene oil and petrol gas from petrol?

1. Pyrolysis
2. Controlled oxidation
3. Isomerisation
4. Aromatization

Q.

The catalyst used for conversion of ethene to ethane is commonly __________.

Q. Identify the product 'P' in the given oxidation reaction:
$(C{H}_3{)}_{3}H+[O]\stackrel{KMn{O}_4}{⟶}P$

1. $(C{H}_3{)}_{3}COH$
2. $H_{2}O$ and $C{O}_2$
3. $C{H}_{3}C{H}_{2}C{H}_{2}CHO$
4. $C{H}_{3}C{H}_{2}C{H}_{2}C{H}_{2}OH$

Q. The final product of complete oxidation of hydrocarbons is

1. Acid
2. Aldehyde
3. $H_{2}O+C{O}_2$
4. Dihydric alcohol

Q. Which of the following is oxidised by $KMn{O}_4$?

1. Isobutane
2. Neopentane
3. Pentane
4. Methane

Q. Which acts both an oxidizing as well as reducing agent?

1. $HN{O}_3$
2. $HN{O}_2$
3. $H_{2}S{O}_4$
4. $HCl$

Q. An organic compound ‘A’ on reaction with $N{H}_3$ followed by heating gives compound B. Which on further strong heating gives compound $C\left(C_8{H}_{5}N{O}_2\right)$. Compound C on sequential reaction with ethanolic KOH, alkyl chloride and hydrolysis with alkali gives a primary amine. The compound A is :

Q. Grignard reagent is prepared by the reaction between:

1. zinc and alkyne
2. zinc and alkyl halide
3. magnesium and alkane
4. magnesium and alkyl halide

Q. Name the compounds formed when methane burns in :

(a) Sufficient air Give a balanced equation

Q.

Name the product formed on the complete combustion of hydrocarbons.

Q. 12 ml of a gaseous mixture of an alkane and an alkene (containing same number of carbon atoms) require exactly 285 ml of air (containing $20\%$ by volume of $O_2$ and rest $N_2$) for complete combustion at room temperature. After combustion when the gaseous mixture is passed through a KOH solution, it shows a volume contraction of 36 ml. Find the true statement(s) in the following options:

1. The alkane is propane
2. The alkene is butene
3. Mole fraction of $C{O}_2$ in the final gaseous mixture is $\frac{3}{22}$
4. Liquid water formed is 42 ml