Among the following reactions, the incomplete combustion of methane is:

1.	\(2 {CH}_4+{O}_2 \xrightarrow[]{\mathrm{Cu/523 \ K/100 \ atm}} 2 {CH}_3 {OH}\)
2.	\({CH}_4+{O}_2 \xrightarrow[]{{Mo_{2}O_{3}}} {HCHO}+{H}_2 {O}\)
3.	\(CH_4 + O_2 → C + 2H_2O\)
4.	\(CH_4 + 2O_2 → CO_2 + 2H_2O\)

Arrange the following alkyl halides in decreasing order of the rate of $\mathrm{\beta }$-elimination reaction with alcoholic KOH.

A.
B.	CH3-CH2-Br
C.	CH3-CH2-CH2-Br

1. A > B > C

2. C > B > A

3. B > C > A

4. A > C > B

Which of the following is a free radical substitution reaction?

1. Benzene with Br₂/AlCl₃

2. Acetylene with HBr

3. Methane with Br₂/hv

4. Propene with HBr/(C₆H₅COO)₂

Match the reagent from Column I which on reaction with CH₃-CH=CH₂ gives the same product given in Column II as per the codes given below

Codes:

The correct order of decreasing reactivity of the following compounds:

Chlorobenzene, 2,4-Dinitrochlorobenzene, and p-Nitrochlorobenzene

with an electrophile (E⁺)  is :

Decreasing order of acidic behavior of benzene, n-hexane, and ethyne is:

1. Hexane > Ethyne > Benzene

2. Benzene > Hexane > Ethyne

3. Ethyne > Benzene > Hexane

4. Benzene > Ethyne > Hexene

The products formed after ozonolysis of Pent-2-ene are:

Mark the correct order of reactivity towards the electrophilic aromatic substitution reaction.

Which of the following is/are aromatic structure(s)?

a.		b.
c.		d.

The dihedral angle of the least stable conformer of ethane is: