The Prussian blue colour obtained during the test of nitrogen by Lassaigne's test is due to the formation of-

1.	Fe4[Fe(CN)6]3	2.	Na3[Fe(CN)6]
3.	Fe(CN)3	4.	Na4[Fe(CN)5NOS]

Find the method used for the preparation of soda extract.

1. Fusing sodium carbonate with the organic compound mixture, followed by extraction with water

2. Dissolving NaHCO₃ and the organic compound mixture in dilute HCl

3. Boiling Na₂CO₃ and the organic compound mixture with dilute HCl

4. Boiling Na₂CO₃ and a mixture of hydrocarbons in distilled water

The most stable carbocation among the following is:

1.		2.
3.		4.

The arrangement in decreasing order of stability of $\stackrel{\bullet }{C}$H₃, $\stackrel{\bullet }{C_2}$H₅,(CH₃)₂$\stackrel{\bullet }{C}$H and (CH₃)₃ $\stackrel{\bullet }{C}$ free radicals is-

1. $\stackrel{\bullet }{C}$H₃ > $\stackrel{\bullet }{C_2}$H₅ > (CH₃)₂$\stackrel{\bullet }{C}$H > (CH₃)₃ $\stackrel{\bullet }{C}$  

2. (CH₃)₃ $\stackrel{\bullet }{C}$ > (CH₃)₂$\stackrel{\bullet }{C}$H > $\stackrel{\bullet }{C_2}$H₅ > $\stackrel{\bullet }{C}$H₃

3. $\stackrel{\bullet }{C_2}$H₅ > $\stackrel{\bullet }{C}$H₃ > (CH₃)₂$\stackrel{\bullet }{C}$H > (CH₃)₃ $\stackrel{\bullet }{C}$

4. (CH₃)₃ $\stackrel{\bullet }{C}$ > (CH₃)₂$\stackrel{\bullet }{C}$H >  $\stackrel{\bullet }{C}$H₃  >$\stackrel{\bullet }{{\mathrm{\hspace{0.17em}C}}_2}$H₅ 

The species that contains only three pairs of electrons among the following is: 

Arrange H, CH₃, C₂H₅, and C₃H₇ in order of increasing positive inductive effect:

1. H < CH₃ < C₂H₅ < C₃H₇

2. H> CH₃ <C₂H₅ > C₃H₇

3. H < C₂H₅ < CH₃ <C₃H₇

4. None of the above

Which of the following statements accurately describes the stability of allyl and propyl carbocations?

1. Allyl carbocation (CH₂=CH-CH₂⁺) is more stable than propyl carbocation.

2. Propyl carbocation is more stable than allyl carbocation.

3. Both are equally stable.

4. None of the above.

What is the relationship between the two given molecular structures?

Geometrical isomerism is caused by-

1. Restricted rotation around C=C bond.

2. The presence of one asymmetric carbon atom.

3. The different groups attached to the same functional group.

4. None of the above.

A total number of structural isomeric aldehydes and ketones that can exist with
the molecular formula C₅H₁₀O are :
1. 5
2. 8
3. 6
4. 7