our environment — Science STD 10 — Question

Pepsin is an enzyme that can act only in ….. medium. (basic, acidic, phenolic)

For a light ray passing through the prism, the angle between the incident ray and the emergent ray is known as the............... . (diffraction, angle of deviation, tyndall)

During photosynthesis, ………. is evolved as by-product. (carbon dioxide, ozone gas, oxygen)

Magnification produced by a spherical mirror is positive. So, the type of image is .............. . (real & inverted, erect and virtual, none)

The diameter of the human eyeball is approximately ______________ cm. (2.3, 1.5, 3.0)

The molecules of soap are …………. salts of long chain carboxylic acids. (sodium.potassium, Lithium, silicon)

The wall of the arteries are thick and _________.(Elastic, Rigid, Fragile)

_______ SI unit of magnetic field. (coulomb, ampere, Tesla)

Hydropower plants convert the ...... of falling water into electricity. (kinefic energy, potential energy, gravitation)