Soaps were originally made from___________ .

The saponification of a fat or oil is done using _______________ solution for hot process.

Gypsum is added to the cement for_______.

Phenol is ______.

Natural adhesives are made from ________.

_________ gas causes tears in our eyes while cutting onions.

Water, coconut oil and __________ are necessary for soap preparation.

____________ is called as farmer’s best friend.

___________ fertilizer is ecofriendly.

_________ is an example for natural adhesive.

What are the three main constituents of soap?

What are the two different types of molecules found in the soap?

Mention any three physical properties of phenol.

Explain the uses of plaster of paris.

Why gypsum is used in cement production?

How are detergents manufactured?

Concentrated phenol is used as a disinfectant.

Gypsum is largely used in medical industries.

Plaster of Paris is obtained from heating gypsum.

Adhesives are the substances used to separate the components.

NPK are the primary nutrients for plants.

Why earthworm is called as farmer’s friend?

Explain the process of manufacturing cement.

What are uses of Gypsum?

Ravi is a farmer; he rears many cattle in his farm. His field has many bio wastes. Advise Ravi how to change this bio waste to compost by using vermi - composting techniques. Explain the benefits of vermi castings.