Similarity and Differences of Hydrogen with Halogens

Q.

In a metallic substance, the metal ions are held together by a sea of electrons, freely roaming between all the ions as shown in the figure given below. Where do you think this sea of electrons has been accumulated from?

1. All the atoms of the metal
2. Only half of all the atoms of the metal
3. Only one fourth of all the atoms of the metal
4. Not the atoms of the metal but from an outside source

Q.

Heavy water is-

1. Water at 0⁰c

2. D₂O

3. Water obtained after a number of distillations

4. Water containing Fe, Cr, Mn

Q.

Hydrogen resembles halogens in many aspects but which is the most important aspect:-

1. It's tendency to lose an electron and form a cation

2. It's tendency to accept an electron and form a stable configuration

3. Small size of hydrogen

4. Low negative electron gain enthalpy

Q. What is HOMO and LUMO transition?

Q.

Properties of Hydrogen resembles from which of the following elements

1. Sodium

2. Aluminium

3. Chlorine

4. Fluorine

Q.

SF6 is known but SH6 is not. Compound of O with fluorine is known as fuorides not oxides. Explain.