Which of the following have lower density than others?
a) water
b) iron
c) gases
Metals have ability to allow heat to flow through it. What is this property?
a) electrical conductivity
b) mobility
c) thermal conductivity
d) ductility
Which of the following is/are the good conductor/s of heat?
a) iron
b) copper
c) wood
d) both a and b
Why wood is non-conductor of heat?
a) it has high melting point
b) it is non-metal
c) it is malleable and sonorous
d) all of these
Metals have ability to allow electricity through it. What is this property?
a) electrical conductivity
b) mobility
c) thermal conductivity
d) ductility
Which of the following is/are the good conductor/s of electricity?
a) iron
b) copper
c) wood
d) both a and b
