Oxidation of Alkenes

Q. 30. Addition of HBr to 2-methyl-1-propene in the presence of hydrogen peroxide produces (1) 1-Bromobutane (2) 2-Bromopropane (3) 2-Bromo-2-methylpropane (4) 1-Bromo-2-methylpropane

Q.

Ethyne reacts with water in presence of Mercuric sulphate and dilute sulphuric acid to give

1. Ethene

2. Ethanal

3. Ethane

4. Ethanone

Q.

When 2-butyne is passed through red hot iron tube, the product formed is:

1. 1, 2, 3, 4, 5, 6-Hexamethylbenzene

2. Benzene

3. Ethyl benzene

4. 1, 2, 4- Trimethylbenzene

Q. Can nitrogen form 4 bonds.

Q.

The propene reacts with HBr to form

1. Ethane

2. Hexane

3. 2-bromo propane

4. 1-bromo-propane

Q.

Alkanes having tertiary H atom can be oxidized to alcohols in presence of:

1. Ni

2. Mo₂O₃

3. Cu

4. KMnO₄

Q.

Chemical name of the insecticide gammexene is

1. DDT

2. Chloral

3. Benzene hexachloride

4. Hexachloroethane

Q. Dilute aqueous $KMn{O}_4$, at room temperature reacts with R -CH =CH -R to give

1. R – CHO
2. R – COOH
3. RCHOH – CHOHR
4. $C{O}_2+H_{2}O$

Q.
On vigorous oxidation by alkaline permanganate solution $(C{H}_3{)}_{2}C=C{H}_{2}CHO$ gives:

1. a) $(C{H}_3{)}_2-\stackrel{OH}{\stackrel{|}{C}}-\stackrel{OH}{\stackrel{|}{CH}}-C{H}_{2}C{H}_3$
2. 
   
   b) ${}_{\underset{C{H}_3}{╱}}^{\stackrel{C{H}_3}{╲}}CO+\underset{COOH}{\stackrel{C{H}_{2}COOH}{|}}$
3. 
   
   c) ${}_{\underset{C{H}_3}{╱}}^{\stackrel{C{H}_3}{╲}}CHOH+C{H}_{3}C{H}_{2}C{H}_{2}OH$
4. 
   
   d) ${}_{\underset{C{H}_3}{╱}}^{\stackrel{C{H}_3}{╲}}CO+C{H}_{3}C{H}_{2}CHO$

Q. Explain with numbering how the total number of 60 degree bonds in white P4 is 12.

Q. 99 The hydrolysis constant for OCl is 3.0 107 then dissociation constant (Ka ) for HOCl is :- (1) 3.33 109 (2) 3.33 107 (3) 3.33 108 (4) 3.33 106

Q. WRITE THE BOND LINE FORMULA OF H-C≡ C-CH_2-\underset\vert CH-CH_3 OH

Q.

Addition of dihydrogen to propyne forms:

1. Carbocation

2. Ethanal

3. Carbanion

4. Propene

Q.

Select the Correct statement :

1. In the Chlorination of n-butane , 2-Chlorobutane is formed faster than 1-Chlorobutane

2. Bromine is less reactive towards alkanes in general than Chlorine but Bromine is more selective in the site of attack when it does react.

3. Reactivity towards alkanes is F₂ > Cl₂ > Br₂ > I₂

4. None of the above

Q.

Location of double bond in unsaturated hydrocarbon can be detected by

1. Ozonolysis reaction

2. Bayer's reagent

3. Br₂ in CCl₄

4. Tollen's reagent

Q.

Alkynes on reduction form trans alkenes in presence of:

1. Pd/C

2. Na/Liquid NH₃

3. Alc. KOH

4. Conc.H₂SO₄

Q. How many of the following can retard the decomposition of concentrated H202? Ethanol, Acetic acid, Ethylene glycol, Benzene, Sulphuric acid, Phosphoric acid

Q.

Regarding benzene some statements are given below

A) Benzene is an aromatic hydrocarbon

B) Benzene undergoes substitution reactions more easily than addition

reactions

C) Resonance energy of benzene is 150.48 kcal/mol

1. A, C and D

2. A, B and D

3. A, B, C and D

4. A and B

Q. Baeyer’s reagent is used for detection of

1. Amines
2. Glucose
3. Unsaturated bond
4. Alcohol

Q.

Which product is obtained when liquid CH₃COO^-K⁺ is electrolysed?

1. Ethane

2. Ethene

3. Methane

4. Butane

Q.

Dipole moment is shown by

1. 1, 4-dichloro benzene

2. Cis-1, 2-dichloro ethane

3. Trans-1, 2-dichloro, 2-pentene

4. Trans-1, 2-dichloro ether

Q.

$C{H}_{3}C\equiv CC{H}_3\underset{\left(ii\right)H_{2}O/Zn}{\overset{\left(i\right)X}{\to }}C{H}_3-C-C-C{H}_3$

$||||$

$OO$

X in the above reaction is

1. KMnO₄

2. HNO₃

3. O₂

4. O₃

Q. Which of the following compounds possesses theC - H bond with the lowest bond dissociationenergy?(1) Toluene(3) n-pentane(2) Benzene(4) 2, 2-dimethylpropane

Q.

The products obtained when 2 - methyl propene is oxidized with acidic potassium permanganate is

1. $(C{H}_3{)}_{2}C=O,H-CHO$

2. $(C{H}_3{)}_{2}C=O,H_{2}O,C{O}_2$

3. $C{H}_{3}COOH,H-CHO$

4. $C{H}_{3}COOH,H_{2}O,C{O}_2$

Q. the kcvalue for the reaction SO₂(g) + 1/2 O₂ (g)-------SO₃ (g) is 72.5 . what is the value of kc for 2SO_​3(g)--------2SO₂(g) +O₂(g) ?

Q. 10. 1, 1 dimethyl cyclopentane and 1, 2 dimethyl cyclopentane Are they chain isomers?

Q. $C{H}_3-\underset{C{H}_3}{\underset{|}{C}}=CH-C{H}_3\stackrel{KMn{O}_4/H^{+}}{\to }$ product in this reaction

1. $C{H}_3-\stackrel{OH}{\stackrel{|}{\underset{C{H}_3}{\underset{|}{C}}}}-\stackrel{OH}{\stackrel{|}{CH}}-C{H}_3$
2. $C{H}_{3}CHO+C{H}_{3}CHO$
3. $2C{H}_{3}COOh$
4. $C{H}_{3}COC{H}_3+C{H}_{3}COOH$

Q. Which of the following reactions will give optically inactive alcohol(s)?

1. 
2. 
3. 
4. 

Q.

1. 

2. 

3. Both a and b

4. Neither a or b

Q. what is the difference between equillibrium constant and reaction quotient.Why do we need reaction quotient when we already have equillibrium constant??