Metallic Bond

Q.

Among the alkaline earth metals, the element having the lowest melting point is:

1. Be

2. Mg

3. Ca

4. Ba

Q. Arrange in decreasing order of boiling point.

$Si{H}_4,Ge{H}_4,Sn{H}_4,C{H}_4$

1. $C{H}_4>Si{H}_4>Ge{H}_4>Sn{H}_4$
2. $Sn{H}_4>Ge{H}_4>Si{H}_4>C{H}_4$
3. $Si{H}_4>Ge{H}_4>Sn{H}_4>C{H}_4$
4. $Ge{H}_4>Sn{H}_4>Si{H}_4>C{H}_4$

Q. The correct order of melting point will be:

1. $Be>Li$
2. $Be<Li$
3. $Be=Li$
4. Can not be predicted

Q. The correct order of boiling point of $K,Ca,Sc$ is:

1. $K>Ca>Sc$
2. $Ca>K>Sc$
3. $Sc>Ca>K$
4. $K>Sc>Ca$

Q. The correct order of melting point will be:

1. $Be>Li$
2. $Be<Li$
3. $Be=Li$
4. Can not be predicted

Q. Which of the following statement is incorrect regarding band theory?

1. For conductors, no energy gap is there between conduction band and valence band
2. For semiconductors, small energy gap is there between conduction band and valence band
3. For insulators, large energy gap is there between conduction band and valence band
4. None of these