Question

Complete the following sentences:
(a) Metals are ............. conductors of heat, while gases are ............ conductors of heat.
(b) Water is a ............ conductor of heat, while silver is a ................ conductor of heat.
(c) Silver is ............... conductor of heat than iron.

• A. (a) good, bad
  (b) very poor, good
  (c) a better
• B. (a) good, bad
  (b) very good, good
  (c) a better
• C. (a) bad, good
  (b) very poor, good
  (c) a better
• D. (a) good, bad
  (b) very poor, bad
  (c) a better

Answer 1

The correct option is A (a) good, bad

(b) very poor, good
(c) a better

(a) Metals are good conductors of heat, while gases are poor conductors of heat.

The metal has a loose-packed metal lattice which gives the metal ease to transfer the heat from one atom to the other. Also, the free-electron availability of the metal atom makes it efficient to transfer heat and makes it a good conductor of heat.

Non-metals are not less dense and so they don't have enough free electrons to pass heat efficiently. In nonmetals, electrons are held tightly, And no free electrons are allowed to move freely.

(b) Very poor, good.

(c) Better