Improvement in Food Resources — Science STD 9 — Question

What should be added to a Celsius scale reading so as to obtain the corresponding Kelvin scale reading?

Worm castings in the vermicompost have nutrients that are 97% utilizable by the crop plants.

What is the SI unit of retardation?

A substance has neither a fixed shape nor a fixed volume. State whether it is a solid, a liquid or a gas.

Name the particles used by Rutherford in his experiment on the discovery of nucleus. Also state the charge on these particles.

Which of the following are not compounds?
Chlorine gas, Potassium chloride, Iron powder, Iron sulphide, Aluminium foil, Iodine vapour, Graphite, Carbon monoxide, Sulphur powder, Diamond.

Name two diseases caused by:

Infectious agents in polluted water.

What remains constant in uniform circular motion?

Write the molecular formulae for the following compounds.
Mercury (II) chloride.

Classify each of the following, as a physical or a chemical change. Give reasons:
Churning of milk cream to get butter.