Ions are formed from neutral atoms by-

1. Loss of electrons

2. Gain of electrons

3. Sharing of electrons

4. Loss and gain of electrons

Most covalent compound among the following is :

The correct order of covalent bond character among
LiCl, BeCl₂, BCl₃ and CCl₄, is:

1. LiCl < BeCl₂ > BCl₃ > CCl₄

2. LiCl > BeCl₂ < BCl₃ < CCl₄

3. LiCl < BeCl₂ < BCl₃ < CCl₄

4. LiCl > BeCl₂ > BCl₃ > CCl₄

Which follows octet rule-

1. FeCl₂

2. AgCl

3. CaCl₂

4. CuCl

The type of bonds present in N₂O₅ are-

1. Only covalent

2. Only ionic

3. Ionic and covalent

4. Covalent and coordinate

Which is not true according to VBT-

1. A covalent bond is formed by the overlapping of orbitals with unpaired electrons of opposite spins.

2. A covalent bond is formed by the overlapping of orbitals with unpaired electrons of same spin.

3. The greater the extent of overlapping the stronger is the bond.

4. Overlapping takes place only in the direction of maximum electron density of the orbital.

The molecule having a high dipole moment among the following is-

1. H₂S

2. BF₃

3. CO₂

4. CCl₄

Allyl cyanide; C₃H₅CN has-

1. 9 sigma bonds and 4 pi bonds

2. 9 sigma bonds, 3 pi bonds and 1 lone pairs

3. 8 sigma bonds and 5 pi bonds

4. 8 sigma bonds, 3 pi bonds and 4 non-bonding electrons.

The hybridization of carbon atoms in C-C single bond of HC≡C-CH=CH₂ is-

1. $s{p}^3-s{p}^3$

2. $s{p}^2-sp$

3. $sp-sp$

4. $s{p}^3-sp$

C-C bond in C₂H₆ undergoes heterolytic fission, the hybridisation of carbon is/are-

1. $s{p}^2$

2. $s{p}^3$

3. $s{p}^2, s{p}^3$

4. $sp, s{p}^2$