A number is first increased by 30% and then decreased by

Formula of ‘Quick Lime’ is __________

Which of the following glass absorbs ultraviolet rays which are harmful for the eyes.

How many protons are present in the nucleus of an oxygen atom?

Ultra-purification of metals is achieved using:

Which gas is commonly used to fill balloons?

Itai-Itai disease is caused by exposure to which metal?

Which element is known as the 'King of Chemicals.

What are antibiotics?

Oil and water can form a stable dispersion with the help of a substance commonly called a(n):

How many electrons are involved in the oxidation by KMnO4 in basic medium