An organic compound ${\mathrm{C}}_4{\mathrm{H}}_6$​ on ozonolysis gives HCHO, CH₃CHO and CO₂ . The compound will be:

(1) ${\mathrm{H}}_2\mathrm{O}=\mathrm{CH}-\mathrm{CH}={\mathrm{CH}}_2$

(2) ${\mathrm{CH}}_3-\mathrm{CH}=\mathrm{C}={\mathrm{CH}}_2$​

(3) $$${\mathrm{CH}}_3-\mathrm{C}\equiv \mathrm{C}-{\mathrm{CH}}_3$

(4) 

An unsaturated hydrocarbon on complete hydrogenation gives 1-isopropyl-3 methylcyclohexane, after ozonolysis it gives one mole of formaldehyde, one mole of acetone and one mole of 2,4-Dioxohexanedial. The possible structure\s of the hydrocarbon may be

1.  

2.  

3.  

4. 

Which one of the following reactions is not possible?

1. CH₃COONa + HCI → CH₃COOH + NaCI

2. CH₃–SO₃H + → CH₃SONa + 

3.  + PhONa → PhOH + 

4. + NaNH₂→  + NH₃ 

Observe the following sequence of reactions.

The product R is:

1.
2.
3.
4.

'X' is :

(1)
(2)
(3)	Both
(4)	None of these

Which of the following is a correct statement regarding the relative acidic character of cyclopropane and propane?

1. Cyclopropane is more acidic than propane

2. Propane is more acidic than cyclopropane

3. Both are equally acidic

4. Bothe are neutral

No . of products and No. of fractions are respectively

(1) 6, 5

(2) 6, 4

(3) 5, 4

(4) 6, 3

Consider the following reaction

1.
2.
3.
4.

In the following series of reactions the major products P and S are respectively.

$\stackrel{{\mathrm{Br}}_2/\mathrm{hv}}{\to }\left(P\right)\stackrel{tBu{O}^{⊝}}{\to }\left(Q\right)\underset{\underset{}{\left(ii\right)Th{O}_2,∆/\left(iii\right)alc.KOH}}{\overset{\left(i\right)HOBr/H^{+}}{\to }}\left(R\right)\underset{\underset{}{\left(ii\right)Th{O}_2,∆/\left(iii\right)alc.KOH\mathit{,}\mathit{∆}}}{\overset{\left(i\right)HOBr/H^{+}}{\to }}\left(S\right)$

1. 

2. 

3. 

4. 

The most appropriate major product of the followning sequence of reactions would be

(1)
(2)
(3)
(4)