Structure of the Atom — Science STD 9 — Question

When the frequency of the sound is increased, the wavelength __________. (Increases, Decreases, Remains constant)

Milk is a ________ solution but vinegar is a ________ solution.

The value of g on the earth is about ______ of that on the moon.

The term protoplasm was coined by _________. (J.E. Purkinje, Robert Hooke, Schleiden)

The smell of perfume gradually spreads across a room due to _________.

Brine is a ___________ whereas alcohol is a ___________.

In a chemical reaction, the sum of the masses of the reactants and products remains unchanged. This is called ______. (Law of Conservation of Mass, Law of Constant Proportion, Law of Multiple Proportions)

In fluids (liquids and gases), pressure acts in ______ directions, and pressure ______ as the depth increases.