Metals and Non-Metals — Science STD 10 — Question

Name the scientist who discovered that sunlight consists of seven colours.

The following questions are about the nuclear reactor of a power plant.
Which isotope of uranium produces the energy in the fuel rods?

State the physical conditions of reactants in which the reaction will not take place.

How is energy introduced into the ecosystem?

Mendel said that the characteristics or traits of organisms are carried from one generation to the next by internal factors which occur in pairs. What is the modern name for these factors?

What type of chemical reaction is responsible for causing rancidity?

What colour would the universal indicator show in an aqueous solution of sugar? Why?

Name the following:
An enzyme secreted by gastric glands in stomach which acts on proteins.

Electrons are responsible for conduction in a conductor. The speed of electron is not very high. Then, how the bulb is on immediately even through the switch and bulb are far away from
each other in a household circuit?

Name one metal which is stored in kerosene oil.