The Fundamental Unit of Life — Science STD 9 — Question

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

A heterogeneous mixture of liquid and solid is separated by ________. (Centrifugation, Filtration, Sublimation)

_______ epithelium occurs in the lining of renal tubules and ducts of salivary glands. (Cuboidal, Columnar, Squamous)

The anode rays obtained from hydrogen gas consist of particles called __________. (Protons, Electrons, Neutrons)

The valency of nitrogen in N₂ molecule is ________. (3, 2, 4)

Miscible liquids are separated by ________. (Fractional distillation, Filtration, Decantation)

The particle which is formed by the loss of electrons by an atom is called _________. (Cation, Anion, Neutron)

________ are forms of complex tissue. (Xylem, Parenchyma, Epidermis)

Cork cells possess __________ on their walls that makes them impervious to gases and water. (Suberin, Lignin, Pectin)

The gases of air can be separated by fractional distillation because they have different ________. (Boiling points, Melting points, Densities)