List four substances which are good absorbers of sound.

Good absorbers of heat are

Good reflector of sound:

List three categories of substances which are ensured greater diffusion due to large surface/volume ratio of the cells.

Which of the following law states that "good absorbers of heat are good emitters"

List any four uses of auxins.

List any four uses of auxins.

Which food substance is absorbed, without digestion-

A substance used to absorb arsenic impurity

Which of the following substances are absorbed by passive transport ?

From the list given below select the correct substance which is most suitable to the statements given : [oxygen, diamond, zinc, graphite, gold] (a) A metal which is brittle (b) A non-metal which is a good conductor of electricity. (c) The hardest naturally occurring substance. (cl) The most ductile metal. (e) A gaseous non-metal.