The incorrect curved-arrow notation that shows the formation of reactive intermediates in the following compound is-

1.
2.
3.
4.	All of the above

Consider the following molecule.

(a) H₃C-H, H₃C-Br

(b) H₃C-NH₂, H₃C-OH

(c) H₃C-OH, H₃C-SH

The bond which is more polar in the given pairs of molecules is-

Consider the following compound:
 
Carbon with minimum impact of negative inductive effect of Br is -

1. C₁
2. C₂
3. C₃
4. All have same inductive effect

 

The correct resonance structures of CH₃COO^- among the following are-
 

1.
2.
3.
4.

Consider the possible resonating structures of CH₂=CH–CHO is as follows:


The correct sequence of stability is-

1. II > I > III
2. III > I > II
3. I > III > II
4. I > II > III

Consider the resonance structure of CH₃COOCH₃  as follows:



The correct statement among the following is-

The correct order of stability of following carbocation is-

1. b > a > c
2. a > c > b
3. a > b > c
4. c > b > a

${}_{\mathrm{}}\stackrel{}{}{}_{\mathrm{}}\stackrel{}{}{}_{\mathrm{}}$

On complete combustion, 0.246 g of an organic compound gave 0.198g of carbon dioxide and 0.1014g of water.
The percentage composition of carbon and hydrogen in the compound  are respectively-

1. 21.95 %; 4.58 %
2. 33.46 %; 3.14 %
3. 42.15 %; 2.61 %
4. 25.24 %; 3.98 %

In Dumas’ method for estimation of nitrogen, 0.3g of an organic compound gave 50mL of nitrogen collected at 300K temperature and 715mm pressure. The percentage composition of nitrogen in the compound is-

(Aqueous tension at 300K=15 mm)

1. 21.43%

2. 25.13%

3. 19.46%

4. 17.46%