0.2 g of an organic compound on complete combustion produces 0.44 g of CO₂. The percentage of carbon is -

1. 50%

2. 60%

3. 70%

4. 80%

The IUPAC name of the above mentioned compound is-

1. 3-Ket-2-methylhex-4-enal

2. 5-Formylhex-2-en-3-one

3. 5-Methyl-4-oxohex-2-en-5-al

4. 3-Keto-2-methylhex-4-enal

The IUPAC name of the above-mentioned compound is - 

1. (N-Bromo)-3-methyl-2-oxobutanamide

2. (N-Bromo)-2-oxo-4-methylbutanamide

3. (N-Bromo)-1,2-dioxo-3-methylbutanamine carboxamide

4. (N-Bromo)-1-oxo-2-methylpropane

The colour of the solution that gets formed by mixing sodium nitroprusside to an alkaline solution of sulfide ions, is-

In Kjeldahl's method, the nitrogen present is estimated as-

1. N₂ 

2. NH₃

3. NO₂ 

4 None of the above

In Kjeldahl's method of estimation of nitrogen, K₂SO₄ acts as:

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

Soda extract is prepared by-

1. Fusing soda and mixture of hydrocarbons, and then extracted with water

2. Dissolving NaHCO₃ and mixture of hydrocarbons in dil. HCl

3. Boiling Na₂CO₃ and mixture of hydrocarbons in dil. HCl

4. Boiling Na₂CO₃ and 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  >$\stackrel{\bullet }{{\mathrm{ C}}_2}$H₅