Which of the following is optically active _________

(a)

2 – methyl pentane

(b)

citric acid

(c)

Glycerol

(d)

none of these

The compound that will react most readily with gaseous bromine has the formula (NEET)_____________

(a)

C₃H₆

(b)

C₂H₂

(c)

C₄H₁₀

(d)

C₂H₄

The major product formed when 2 – bromo – 2 – methyl butane is refluxed with ethanolic KOH is ___________

(a)

2 – methylbut – 2 – ene

(b)

2 – methyl butan – 1 – ol

(c)

2 – methyl but – 1 – ene

(d)

2 – methyl butan – 2 – ol

Some meta-directing substituents in aromatic substitution are given. Which one is most deactivating?

(a)

– COOH

(b)

– NO₂

(c)

– C ≡ N

(d)

– SO₃H

An alkane is obtained by decarboxylation of sodium propionate. Same alkane can be prepared by __________

(a)

Catalytic hydrogenation of propene

(b)

action of sodium metal on iodomethane

(c)

reduction of 1 – chloro propane

(d)

reduction of bromomethane

Sodalime is the mixture of_______

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NaOH + CaO

The potential energy difference between the staggered and eclipsed conformation of ethane is_________

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12.5 kJ/mol

Addition of hydrohalides to alkene is an example for________

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Electrophilic addition

Benzene contains_____ σ bonds and π bonds

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12,3

Alkane

(1)

1

Alkyne

(2)

C_nH_2n-2

C₄H₁₀

(3)

Juice containers

C₃H₄

(4)

C_nH_2n+2

HDPE

(5)

2

How is propyne prepared from an alkyene dihalide?

Describe the mechanism of Nitration of benzene.

What happens when isobutylene is treated with acidified potassium permanganate?

Describe the conformers of n - butane.

Explain Markow nikoff's rule with suitable example.

Write the structures of folowing alkanes.
1) 2, 3 – Dimethyl – 6 – (2 – methyl propyl) decane
2) 5 – (2 – Ethyl butyl) – 3, 3 – dimethyldecane
3) 5 – (1, 2 – Dimethyl propyl) – 2 – methylnonane.

How will you prepare propane from a sodium salt of fatty acid?

Listout the uses of alkanes.

Write a brief note on polymerisation of alkenes.

State Huckel's rule of aromaticity and explain it interms of cyclopentadiene, cycloxtateraene and cyclopropenylcation.

How to write the possible isomers of C₅H₁₂?

Identify the compound A, B, C and D in the following series of reactions

How are alkynes prepared from the following?
(i) Alkenes
(ii) Gem dihalides
(iii) Potassium maleate
(iv) Calcium carbide