Structure of Amines & Optical Activity

Q. Hypervalent species among the following is 1. BF3 2.CO2 3.SiF4 4.XeF6

Q. an aromatic compound like toluene free radical (free radical is the methyl part) can exhibit resonance to form an anti aromatic compound so will toluene free radical exhibit resonance or not?

Q.

The compound C₅H₁₃N is optically active and reacts with HONO to give C₅H₁₁OH. The compound is

1. N - Methyl butanamine
2. 2 - Amino pentane
3. 1 - Amino pentane
4. N, N - Dimethyl propanamine

Q. Is milliequivalent is equal to 10-3 of gram equivalent? In which cases we use milliequivalent ? And when no. of moles is equal to milliequivalents ?

Q.

In acetylene molecule (HC ≡ CH) the carbon atoms are:

1. sp, sp hybridized

2. sp³, sp³ hybridized

3. sp, sp³ hybridized

4. sp, sp² hybridized

Q.

The hybridisation of Carbon in ethylene is:

1. sp

2. sp²

3. sp³

4. sp³d

Q. BF3 acts as lewis acid while CCl4 can not do so. Why?

Q.

Which statement is true regarding the following structure?

1. It is a chiral molecule

2. It exists in two resovable optically active forms

3. Both a) and b)

4. Neither a) nor b).

Q. How many p-orbitals participate in the hybridization of nitrogen in pyrrole?

Q. Which of the following hydr ide have significantcovalent character) LiH 2) BeH 3) MgH, 4All