MP, BP and Electrical Conductivity

Q. Which of the following compounds are poor conductors of electricity?

1. Distilled water
2. HCl in water
3. Pure $C{H}_{3}COOH$
4. $H_{2}S{O}_4$ in water

Q. What is the primary requirement for a compound to be a good conductor of electricity?

1. Presence of free electrons
2. Presence of free ions
3. Compound should have covalent bonds
4. Neutral atoms

Q. Diamond is not good conductor of electricity because

1. its structure is very compact.
2. it is not soluble in water.
3. it has no free electrons.
4. it is very hard.

Q. Among the following substances, has free electrons to conduct electricity.

1. Carbon monoxide
2. Graphite
3. Coal
4. Diamond

Q. What is the primary requirement for a compound to be a good conductor of electricity?

1. Presence of free electrons
2. Presence of free ions
3. Compound should have covalent bonds
4. Neutral atoms

Q. Question 2
Which of the following statements are usually correct for carbon compounds? These
(i) Are good conductors of electricity
(ii) Are poor conductor of electricity
(iii) Have strong forces of attraction between their molecules
(iv) Do not have strong forces of attraction between their molecules

(a) (i) and (iii)
(b) (ii) and (iii)
(c) (i) and (iv)
(d) (ii) and (iv)

Q.

Two non-metals combine with each other by the sharing of electrons to form a compound X.
(a) What type of chemical bond is present in X?
(b) State whether X will have a high melting point or low melting point.
(c) Will it be a good conductor of electricity or not?
(d) Will it dissolve in an organic solvent or not?

Q.

You can buy solid air fresheners in shops. Do you think these substances are ionic or covalent? Why?

Q.

The solution of one of the following compounds will not conduct electricity. This compound is:
(a) $NaCl$

(b) $CC{l}_4$

(c) $MgC{l}_2$

(d) $CaC{l}_2$

Q.

An element A has 4 valence electrons in its atom whereas element B has only one valence electrons its atom. The compound formed by A and B does not conduct electricity. What is the nature of chemical bond in the compound formed ? Give its electron dot structure.