Chemistry

The number of electrons lost to form a positive ion or the number of electrons gained to form negative ion by an element while forming a compound is called the oxidation number of that element.

Brine is a high concentration solution of NaCl.

If 1 liter of solution has 0.1 mole solute then it is called decimolar solution. Decimolar solution means the molarity of solution is M/10 or 0.1 M. That is, 0.1 mole of solute is dissolved in 1 L of solution. Since, 1 L=1/1000 m3, therefore it can be said, 0.1 mole of solute is dissolved … Read more

The combination of proton and neutron number in the atom nucleus is called nucleon number.

The chemical reaction which generates heat is called an exothermic reaction.

The important elements of the environment, soil, and water get severely contaminated when pesticides are used excessively. Again, excessive use of pesticides lessens the fertility of the soil and causes pollution. Besides, pesticides pollute water by getting mixed in water and reaching rivers and ponds.

Artificial polymer produced from different chemical compounds is called plastic.

Chemical substance containing carbon, nitrogen, phosphorus etc. elements, which act as nutrient for soil is called chemical fertilizer.