Metals and Non-Metals — Science STD 10 — Question

An electric lamp is labelled 12V, 36W. This indicates that it should be used with a 12V supply. What other information does the label provide?

Name a carbon containing molecule which has two double bonds.

The scientist who classified elements on the basis of atomic number.

What is the genotype of.

1. Dwarf plants, and
2. Tall plants, whose parental cross always produces tall offspring?

When potassium nitrate is heated, it decomposes into potassium nitrite and oxygen. Write a balanced equation for this reaction and add the state symbols of the reactants and products.

Which are the various ways that help us to relieve stress?

What percentage of the solar energy is trapped and utilised by the plants?

Which produces more energy: nuclear fusion or nuclear fission?

Name the following:
Organisms that cannot prepare their own food.