What is common to the places known as Aliyar, Isapur and

_____ is the movement of chemicals in the upper layers of soil into lower layers or into groundwater by being dissolved in water.

Which of the following is a synthetic polymer?

Which element gives hardness to stainless steel?

Red light is used for signals because it has –

The product of the equivalent weight and valency of an element equals its ______.

The percentage of nitrogen in urea is :

Which gas is used to convert vegetable oils into solid fats?

Which type of bond is formed by the sharing of electrons?

What is the maximum value of deforming force up to which a material shows elastic property and above which the material loses it?

A mixture of carbon monoxide and hydrogen is known as ______